Falancs User En

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LMS FALANCS User

Manual

Part of the

LMS F L NCS

Documentation


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F-ii LMS FALANCS User Manual

Copyright Notice

Copyright © 1998-2002 by LMS Deutschland GmbH. All rights reserved.

No part of this publication may be reproduced, stored in a retrieval system, or transmit-ted, in any form or by any means, electronically, mechanicallly, by photocopying, re-

cording or otherwise, without the written permission of LMS Deutschland GmbH, Lux-emburger Straße 7, D-67657 Kaiserslautern, Germany.

Registered Trademarks

TecWare, LMS TecWare FatiCount, LMS TecWare AutoAnalyze, LMS TecWare RainE-dit, LMS TecWare RainExtra, LMS TecWare MultiRain, LMS TecWare CombiTrack,LMS TecWare RP-Filter, LMS FALANCS LifeStat, LMS TecWare GIDAS, LMS FAL- ANCS, LMS FALANCS/FEM, LMS FALANCS/FSE and LMS TecWare TimeEdit areregistered trademarks of LMS International NV.

ANSYS is a registered trademark of ANSYS Inc.

I-DEAS and I-DEAS Master Series are registered trademarks of Structural Dynamics

Research Corporation.

NASTRAN is a registered trademark of the National Aeronautics and Space Administra-tion.

PATRAN and MSC/NASTRAN are registered trademarks of MacNeal-Schwendler Cor-poration.

Pro/MECHANICA is a registered trademark of Parametric Technology Corporation.

CATIA is a trademark of Dassault Systèmes.

Open Software Foundation, OSF, OSF/Motif and Motif are trademarks of The OpenSoftware Foundation, Inc.

UNIX is a registered trademark of Novell Inc.; licensed exclusively through X/OpenCompany, Ltd.

DEC, VAX, VMS are registered trademarks of Compaq Computer.

HP and HP 9000 are registered trademarks of Hewlett.Packard Company.

SGI and IRIX are registered trademarks of Silicon Graphics Inc..

SUN and Solaris are registered trademarks of Sun Microsystems Inc..

All other product names mentioned in this document are trademarks or registeredtrademarks of their respective manufacturers.

Preliminary Notice

LMS Deutschland GmbH aims to deliver software of high quality which conforms to thespecifications agreed with licensees, but cannot guarantee that all features will perform

exactly as described. Those who use the program do so on the understanding that theresults from analysis software are dependent on the inputs. In any case, the programshould be used in accordance with the instructions contained in the documentation andother information provided with the program supplied by LMS Deutschland GmbH. LMSDeutschland GmbH does not warrant that any specific feature will produce specific re-sults, and does not accept liability for any losses, direct, consequential or otherwise, re-sulting from the use of the program.

Authoring notes

Prof. M.E. Barkey, Ph.D., University of Alabama: author

Dr. Michael Hack, LMS Deutschland GmbH: author

Dr. Michael Speckert, LMS Deutschland GmbH: author

Dr. Frank Zingsheim, LMS Deutschland GmbH, author

Gabi Schäfer, LMS Deutschland GmbH, author and editor


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LMS FALANCS features and benefits F-iii

LMS FALANCS features and benefits

Features Import of FEM results from all popular packages; loads

from kinematic simulations, test environments.

Calculates fatigue-life using stress-life and strain-life ap-

proaches.

Supports both uniaxial and multiaxial loading and calcu-

lates response for local multiaxial stress states using critical

plane approaches and local plasticity models.

Provides dedicated approaches for both seam welds and spotwelds.

Modal superposition to handle situations in which the low-

est natural frequency of the component is close to the load-

ing frequency.

Automatic node-elimination and clustering.

Displays results in your FEM post-processor as damage con-

tours.

Supports multiple platforms and parallel processing.

Benefits

Helps the design team to find critical locations and time to

failure without guesswork.

Identifies potential fatigue problems and evaluates the fa-

tigue performance between design changes before hard

prototyping.

Advanced yet proven technology– validated by test.

Open solver that works with most FEM packages – no need

to learn new post-processor.

Easy to use for occasional user, yet sophisticated enough to

handle the most advanced applications.

Handles industrial-size tasks with 1,000,000+ nodes and

100+loads.


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Speed of calculation enables practical design troubleshoot-

ing.

Allows test and analytical departments to work together.


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Overview of the LMS FALANCS documentation F-v

Overview of the LMS FALANCS

documentation

The documentation of the LMS FALANCS fatigue analysis tool

is split in several manuals:

Remark: Some of the manuals are available as printable Adobe

pdf files and/or as a online html version, only.

LMS FALANCS User Manual (this manual)

The LMS FALANCS User Manual describes the fatigue

analysis tool LMS FALANCS developed by LMS Deutsch-

land GmbH. This users manual is addressed to new LMS

FALANCS users as well as to persons who already have

worked with former versions of LMS FALANCS . It is in-

tended to explain the basic steps as well as to give detailed

information on the user interaction.

LMS FALANCS Theory Manual

The objective of the theory manual is to present and define

the fatigue analysis approaches and methods that are avail-

able in LMS FALANCS . The reader is assumed to have

some prior background with basic fatigue analysis methods.

For readers interested in an in-depth discussion about fa-

tigue analysis, there are several introductory and advanced

texts on fatigue analysis listed in the reference section in

addition to citations to relevant literature.

LMS FALANCS Examples & Verification

The intention of the Examples & Verification manual is to

assist the user in the first steps with LMS FALANCS . It

guides the user from standardized fatigue tests to complex

analysis runs.

Each example explains particular fatigue analysis tasks and

describes the necessary steps in detail.

The verification parts explain in detail how the individual

results are calculated by hand. It is clear that those verifi-


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F-vi LMS FALANCS User Manual

cation parts are only available for examples with simple

loads.


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Getting started F-vii

Getting started

The LMS FALANCS User Manual describes the fatigue analysis

tool LMS FALANCS developed by LMS Deutschland GmbH. It

guides the user from standardized fatigue tests to complex

analysis runs.

This users manual is addressed to new LMS FALANCS users

as well as to persons who already have worked with former

versions of LMS FALANCS . It is intended to explain the basic

steps as well as to give detailed information on the user inter-action.

The manual describes the capabilities of a full LMS FALANCS

installation. Some of the features may be not available in your

installation. See the part about licensing options in Part 1.

Part 1 Purpose of LMS FALANCS and related tools

gives an introduction to LMS FALANCS and fatigue analy-

sis.

Part 2 First Steps

helps the user who already has worked with fatigue analy-

sis tools how to perform his requests with LMS FALANCS .

Part 3 Reference – Graphical User Interface

explains the graphical user interface of LMS FALANCS in

detail including the error and information messages.

Part 4 Reference – Batch Mode Interface

gives detailed information about the batch mode and the

batch command files of LMS FALANCS .

Part 5 Reference – General Settings

describes the contents of the configuration files and explains

the use of some additional programs provided by the LMS

FALANCS installation.


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F-viii LMS FALANCS User Manual

Part 6 Reference Interfaces to Finite Element Tools

helps the user of LMS FALANCS/FEM in the use of his fi-

nite element tool in connection to LMS FALANCS .

Part 7 Databases

gives detailed information on the configuration of databases

in LMS FALANCS and the used database formats..

Part 8 Seam Weld Databases

describes the provided seam weld catalogues.

Part 9 Installation

gives hints on the installation of LMS FALANCS

Part 10 Frequently Asked Questions

answers some of the most commonly ask questions.

Part 11 LMS FALANCS for Microsoft Windows

describes the peculiarities of the Microsoft Windows version

of LMS FALANCS .

Appendix: File Formats

Here some ASCII data formats are described in detail.

Appendix: Data Representations of Stress-Life Curves

and Dang Van Data

gives detailed information on the relations between the dif-

ferent data representations.

Appendix: Windows in LMS FALANCS

describes the windows used inLMS FALANCS

in detail

Appendix: References, Glossary, Index

contains references on further readings on fatigue and

welding, a glossary and the index of the LMS FALANCS

User Manual and the LMS FALANCS Theory Manual .


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Table of Contents F-xiii

Table of Contents

LMS FALANCS features and benefits ..................................... F-iii

Overview of the LMS FALANCS documentation ......................F-v

Getting started.......................................................................... F-vii

Table of Contents .................. .................................................... F-ix

Table of Illustrations ............................................................... F-xix

Part 1 Purpose of LMS FALANCS and related tools F-1

Virtual Prototyping for Durability........................................... F-3

3 steps for durability processing ................................................ F-3

LMS FALANCS : basic product and optional parts,

licensing.......................................................................................... F-5

Interactive and batch mode ....................................................... F-7

Related LMS FALANCS tools.....................................................F-9

LMS FALANCS LifeStat............................................................ F-9

Related LMS TecWare tools .....................................................F-11

LMS TecWare MultiRain ......................................................... F-11

LMS TecWare Time Edit and TimeView................................. F-13

LMS TecWare RainView .......................................................... F-14

Part 2 First Steps F-17

Introduction to LMS FALANCS...............................................F-19

Starting LMS FALANCS ......................................................... F-19

Exiting LMS FALANCS ........................................................... F-21

Concepts of the Graphical User Interface ............................... F-22

Geometry Work Sheet............................................................... F-24

Common Analysis Steps ............................................................F-27

Parameter Databases ............................................................... F-27

Database selection .................................................................... F-28


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File selection.............................................................................. F-29

Channel selection...................................................................... F-29

A standard Non-FEM stress life analysis.............................. F-31

Collecting Input Data for Non-FEM Analyses........................ F-32Starting and Modifying the GWS for a non-FEM stress-

life analysis................................................................................ F-40

Starting an analysis from the Geometry Work Sheet ............ F-49

Interpreting results for the Non-FEM stress approach .... F-53

A standard Non-FEM strain life analysis.............................. F-57

Interpreting results for the Non-FEM strain approach.... F-61

Basic concepts of FEM-based analysis ..................................F-65

FEM concepts: element sets, node vs. element stresses......... F-65

A standard FEM-based stress life analysis........................... F-67

Collecting Input Data for FEM-based Analyses ..................... F-68

Starting and Modifying the GWS for a FEM-based stress-

life Analysis............................................................................... F-75

Starting a FEM-based Analysis............................................... F-77

A standard FEM-based Strain-life Analysis .........................F-79

Interpreting results for the FEM-based analysis................ F-81

Estimating Cyclic Material Properties..................................F-83

Which data needs to be used for which process ................. F-85

Stress-life Approach.................................................................. F-86

Strain-life Approach ................................................................. F-87

Part 3 Reference – Graphical User Interface F-89

Overview.......................................................................................F-91

Menus.............................................................................................F-93

Overview.................................................................................... F-93

Menu: File ................................................................................. F-95

Menu: Stress-life Approach...................................................... F-98

Menu: Strain-life Approach.................................................... F-103

Menu: Tools ............................................................................. F-108


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Table of Contents F-xv

Menu: Configuration............................................................... F-113

Menu:Help............................................................................... F-114

Common Operations ................................................................F-117

Selection Windows in LMS FALANCS.................................. F-118Working with Databases ........................................................ F-131

Operations on Data Sets......................................................... F-132

Viewing Load Channels.......................................................... F-154

Fatigue Analysis with the windows "Geometry Work

Sheet" and "Geometry Cell" ................................................... F-157

Monitoring Analysis Progress with Computation Status .... F-170

Printing Datasheets or Graphs.............................................. F-177

Management of Non-FEM Results ........................................F-183Loading Non-FEM Results..................................................... F-186

Saving Non-FEM Results....................................................... F-187

Removing Non-FEM Results from the Result

Management............................................................................ F-188

Exporting the List of Non-FEM Results................................ F-189

Management of FEM Results .................................................F-193

Viewing Results.........................................................................F-197

Viewing Non-FEM Results..................................................... F-198

Viewing FEM Results............................................................. F-214

LMS FALANCS Methods .........................................................F-221

Local Time Series (LTS) ......................................................... F-222

LTS Tensor Analysis............................................................... F-224

Transient Analysis.................................................................. F-225

History Reduction ................................................................... F-226

Data Sheets.................................................................................F-231

The Data Sheet for Stress-Life Curves and Dang Van

Data ..............................................................................................F-233

The Data Sheet ....................................................................... F-235

Window "Define Stress-life Data Sheet" ............................... F-236

The Data Sheet for Solution Parameters............................F-251

Window "Define Solution Parameter Set"............................. F-252

The Data Sheet for Material Data.........................................F-273

The Window "Define Material Data Sheet" .......................... F-274


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The Data Sheet for Method Parameters .............................F-283

Window "Define Method parameter"..................................... F-285

Error and Information Messages..........................................F-305

LMS FALANCS Main Program and Graphical UserInterface .................................................................................. F-306

Geometry Work Sheet and Cell.............................................. F-309

Non FEM methods.................................................................. F-314

FEM based analysis................................................................ F-317

Licensing problems ................................................................. F-319

Process communication problems.......................................... F-320

Part 4 Reference—Batch Mode Interface F-321

Starting a Batch Process.........................................................F-323

Start from the command line ................................................. F-323

Start from the Geometry Work Sheet.................................... F-324

Generating Batch Command Files .......................................F-327

Using the Geometry Work Sheet File menu ......................... F-327

Converting Geometry Worksheets to a Batch Command

File ........................................................................................... F-327

Write a new or edit an old Batch command File................... F-328

The Batch Command File ....................................................... F-329

Path Specification ................................................................... F-329

Job Section [Job]................................................................... F-330

Task Section [Tasks] ........................................................... F-332

Method Parameter Section [MethodParam]....................... F-333

SN-Curve section [SNCurve] ............................................... F-346

Material Section [Material] .............................................. F-356

Solution Parameter Section [SolParam]................................ F-366

Element Sets Section [ElementSets]................................. F-385

Channel Definition Section [Channels].............................. F-387

Test Schedule Definition Section [TSD] ............................... F-391

Calibration Section [Calibration] .................................... F-392

Load Case section [LoadCases]........................................... F-393

SigmaE section [SigmaE] .................................................... F-396

Le section [Le] ...................................................................... F-397


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Table of Contents F-xvii

Differences between Interactive and Batch

Processing...................................................................................F-398

The database handling for the references only version........ F-398

The database handling for the full version. .......................... F-399

Lack of job control ................................................................... F-399

License needed for parallel batch jobs................................... F-399

Part 5 Reference – General Settings F-401

System Level and User Specific Settings............................F-403

Structure of a TecWare installation ...................................... F-403

The different locations for configuration files ....................... F-404The Syntax of the Configuration Files .................................. F-405

The most important settings.................................................. F-406

Settings Specific to LMS FALANCS : falancs.ini................F-407

Overview.................................................................................. F-408

Parameters directly influencing the fatigue analysis........... F-410

Parameters for spot weld calculation .................................... F-418

Database configuration........................................................... F-419

Parameter Section for LMS FALANCS Methods resultspecification............................................................................. F-422

LMS FALANCS Data Formats .............................................. F-429

Graphic Display Parameters.................................................. F-432

Parameters for multi processing controllers ......................... F-443

Parameters that should only be changed by system

administrators......................................................................... F-444

Parameters that should only be changed by your LMS

support person......................................................................... F-445

General TecWare Settings ......................................................F-447

Shell Scripts ...............................................................................F-449

The tecware shell script.......................................................... F-449

Logging LMS FALANCS operations ..................................... F-451

FEM related shell scripts ....................................................... F-454

Part 6 Reference—Interfaces to Finite Element Tools F-457

Overview on Supported Interfaces ......................................F-459


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NASTRAN....................................................................................F-461

Supported Versions, Analysis Types and Elements ............. F-461

Limitations and solutions....................................................... F-462

Sample-Load deck................................................................... F-462

Output written by LMS FALANCS ....................................... F-463

Procedures for post-processing............................................... F-465

Using the PATRAN Tool Menu.............................................. F-467

Modal Transient Analysis ...................................................... F-471

Spot Weld Analysis ................................................................. F-472

ANSYS..........................................................................................F-475


Output written byLMS FALANCS

....................................... F-476Spot Weld Analysis ................................................................. F-477

Procedures for post processing............................................... F-478

Generating element sets......................................................... F-480

I-DEAS .........................................................................................F-481


Limitations.............................................................................. F-482


Spot Weld Analysis ................................................................. F-484Generating element sets......................................................... F-485

Pro/MECHANICA......................................................................F-487


Limitations...........................................................................FF--488



ABAQUS ......................................................................................F-491


Sample input file..................................................................... F-492


Spot Weld Analysis ................................................................. F-495


CAT/FALANCS...........................................................................F-497


The CAT/FALANCS philosophy ............................................ F-498The CAT/FALANCS command window................................. F-499

Viewing Results ...................................................................... F-501


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Table of Contents F-xix

Generating Element Sets ....................................................... F-503

Part 7 Databases F-505

Shared or Private Databases .................................................F-507

The Database Configuration Tool ........................................F-509

Starting the DCT from LMS FALANCS ............................... F-510

Starting the DCT as stand alone program............................ F-511

The window "Database Configuration Tool" ......................... F-513

Syntax of Database Definition ............................................... F-518

Description of The Database Formats.................................F-525SN-Curves ............................................................................... F-526

Material Data.......................................................................... F-528

Method Parameter.................................................................. F-530

Solution Parameter................................................................. F-532

Part 8 Seam Weld Databases F-535

Seam Weld Database Types ....................................................F-537R1MS Materials Properties.................................................... F-538

Eurocode 3 ............................................................................... F-540

Structures and Detail Categories .........................................F-543

Non-welded details ................................................................. F-544

Welded build up sections........................................................ F-545

Transverse butt welds ............................................................ F-547

Welded attachments with non load carrying welds.............. F-549

Welded joints with load-carrying welds ................................ F-551

Hollow sections........................................................................ F-554

International Institute of Welding .......................................F-559

Structures and Fatigue Classes............................................. F-561

Part 9 Installation F-587

Installation Instructions.........................................................F-589

Operating Systems: Supported Versions ............................F-591


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UNIX Systems......................................................................... F-591

Microsoft Windows.................................................................. F-591

Installation of CAT/FALANCS ...............................................F-593

Installation.............................................................................. F-594

Special Features for FEM Postprocessors..........................F-595

ANSYS Post Processing Toolbar............................................ F-595

Installing the PATRAN Tool Menu ....................................... F-598

Predefined Directories for Temporary Storage and for

Input Files ..................................................................................F-601

LMS FALANCS Temporary Directory .................................. F-601

Predefined Directories for Input Data................................... F-602

Necessary Storage Space ........................................................F-603

Storage Space Needed for LMS FALANCS Software........... F-603

Temporary Storage Space Needed During LMS

FALANCS Execution.............................................................. F-603

Permanent Storage Needed for LMS FALANCS Results .... F-604

Prepare Batch Processing...................................................... F-605

Queuing outside of LMS FALANCS ...................................... F-606

Queuing from the graphical user interface........................... F-607

Part 10 Frequently Asked Questions F-609

What is the polarity (sign) of load channels?.....................F-611

There are different entries in the Rainflow matrix and

the corresponding Damage matrix. Is that possible? ......F-612

I increase the eL settings in my FEM analysis but the

damage gets smaller.................................................................F-613

I have made an ANSYS static analysis then performed

a fatigue calculation and can no longer find my static

stress results. Where are they?..............................................F-614

I get high stresses at the points where the loads are

applied. Does this have influence on the fatigue

analysis?......................................................................................F-615


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Table of Contents F-xxi

Part 11 LMS FALANCS for Microsoft Windows F-617

LMS FALANCS for Microsoft Windows ...............................F-619

Installation.............................................................................. F-619Starting LMS FALANCS ....................................................... F-619

Pathnames for databases ....................................................... F-619

Global and local configuration ............................................... F-620

Restrictions.............................................................................. F-620

Appendix: File Formats F-621

Directory names........................................................................F-623Unix ......................................................................................... F-623

Supported Data Formats ........................................................F-625

List of load data formats ........................................................ F-625

List of FEM result data formats ............................................ F-626

List of FEM set file formats ................................................... F-626

List of GWS file formats ......................................................... F-627

The Data Format ASCII for Time Series.............................F-629

ASCII File Format of Load-Notch Strain Curves..............F-631

The ASCII Data Format For Element Sets .........................F-633

Appendix: Data Representations of Stress-Life Curves and Dang

Van Data F-635

Data Representation of SN curves (Woehler type............F-637

Data Representation of Stress-Life Bastenaire Curves ..F-639

Data Representation of Dang Van Data..............................F-641

Appendix: Windows in LMS FALANCS F-643

Window "Computation status" ...............................................F-645

Window "Constant Amplitude Life-curve(s) / Stress-

strain curve(s)" ..........................................................................F-647


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Window "Creation of synthetic SN curves".........................F-651

Window "Damage Selection"...................................................F-655

Window "Estimation Based on Uniform Material Law"...F-659

Window "Exit LMS FALANCS " ...............................................F-661

Window "Geometry Cell" .........................................................F-663

Window "Geometry Work Sheet" ...........................................F-667

Window "History Reduction...................................................F-685

Window "Info".............................................................................F-689

Window "Job Setup Window...................................................F-691

Window "Load History Calibration" ..................................... F-693

Window "Load History Channel Information" ...................F-695

Window "Test Schedule Segments - Info" ............................F-697

Window "Options"......................................................................F-699

Window "result selection"........................................................F-703

Window "Setup information"..................................................F-707

Window "Stress-life Approach - Stress-life Curve(s)" .......F-709

Appendix: References, Glossary, Index F-713

References ..................................................................................F-715

General textbooks on fatigue ................................................. F-715

General references on fatigue ................................................ F-716

Fatigue of Welds ..................................................................... F-717

Glossary.......................................................................................F-719

LMS FALANCS - General Index ............................................F-731


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Table of Illustrations F-xxiii

Table of Illustrations

Fig. 1: Display of a rainflow matrix: "bubbles" and "3D solid

bars".......................................................................................F-15

Fig. 2: Display of a rainflow matrix: "3d lines" and "numbers"......F-16

Fig. 3: Starting LMS FALANCS on Microsoft Windows ................F-20

Fig. 4: The message window when exiting LMS FALANCS ..........F-21

Fig. 5: The Geometry Work Sheet (non-FEM stress-life

analysis).................................................................................F-40

Fig. 6: The window "Geometry Cell" (non-FEM stress-life

analysis).................................................................................F-41Fig. 7: Editing a task number in the GWS......................................F-42

Fig. 8: Editing a channel geometry in the GWS .............................F-43

Fig. 9: Editing a channel calibration in the GWS...........................F-43

Fig. 10: Changing a stress-life curve in the GWS.............................F-44

Fig. 11: The analysis in the window "Computation status" .............F-49

Fig. 12: The jobs in the window "Info"...............................................F-50

Fig. 13: The Geometry Work Sheet (FEM-based stress-life

analysis).................................................................................F-75

Fig. 14: The window "Geometry Cell" (FEM-based stress-lifeanalysis).................................................................................F-76

Fig. 15: LMS FALANCS main window..............................................F-93

Fig. 16: Window "LMS FALANCS File Menu"..................................F-95

Fig. 17: Menu Stress-life Approach ...................................................F-98

Fig. 18: Menu Strain-life Approach .................................................F-103

Fig. 19: Menu Tools ..........................................................................F-108

Fig. 20: Window "Starting FALANCS tool: ASCII fil file ->

FALANCS Element sets"....................................................F-108

Fig. 21: Window "Starting FALANCS tool: I-DEAS staticgroups -> FALANCS Element sets" ...................................F-109

Fig. 22: Window "Starting FALANCS tool: ABAQUS ->

FALANCS Element sets"....................................................F-109

Fig. 23: Window "Starting FALANCS tool: Time Series

NASTRAN bulk data" .........................................................F-110

Fig. 24: Window "Starting FALANCS tool: NASTRAN Punch

file Time Series ".............................................................F-110

Fig. 25: Window "Starting FALANCS tool: Time series ->

ABAQUS input" ..................................................................F-111Fig. 26: Window "Starting FALANCS tool: ABAQUS .fil

Time Series " .......................................................................F-111


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Fig. 27: Window "Starting FALANCS tool: IDEAS unv file

Time Series " .......................................................................F-112

Fig. 28: Window "Computation Status "..........................................F-112

Fig. 29: Menu Configuration............................................................F-113

Fig. 30: Menu Help...........................................................................F-114

Fig. 31: The window giving information on the LMS FALANCS

version .................................................................................F-115

Fig. 32: The file selection window (single file) ................................F-119

Fig. 33: The file selection window (several files) ............................F-120

Fig. 34: The Directory Selection window.........................................F-121

Fig. 35: Channel selection window ..................................................F-123

Fig. 36: The Lower list box in the window "Selection of load

cases" ...................................................................................F-124

Fig. 37: Database selection window.................................................F-127

Fig. 38: Database selection window.................................................F-133

Fig. 39: The menu item Method Parameters... after loading

a parameter set ...................................................................F-135

Fig. 40: The menu item Load Histories... in the Stress-life

Approach..............................................................................F-136

Fig. 41: The window "Load History Selection"................................F-137

Fig. 42: The menu item is ticked off. ...............................................F-137

Fig. 43: The menu item FEM: Load Cases... in the Stress-life

Approach..............................................................................F-138

Fig. 44: The window "Selection of load cases".................................F-139

Fig. 45: The selected load cases .......................................................F-140

Fig. 46: The load history channels are added .................................F-140

Fig. 47: The menu item is ticked off. ...............................................F-141

Fig. 48: The window "Test Schedule Segments" .............................F-142

Fig. 49: The menu item Test Schedule Segments... is ticked

off. ........................................................................................F-143

Fig. 50: The window "Selection of element sets".............................F-144

Fig. 51: The menu item FEM: Sets... is ticked off..........................F-145

Fig. 52: Defining a new data set ......................................................F-147

Fig. 53: Updating the data sheet of the SN-curve "Sample

Steel" in the database Default............................................F-150

Fig. 54: Viewing the data sheet of the SN-curve "Sample Steel"

in the database Default ......................................................F-153

Fig. 55: Start viewing load channels ...............................................F-154

Fig. 56: Viewing three time series ...................................................F-155

Fig. 57: Viewing a rainflow matrix..................................................F-156

Fig. 58: The GWS of a Non FEM - fatigue analysis ........................F-158

Fig. 59: The GWS of a Non FEM - tensor analysis .........................F-158


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Table of Illustrations F-xxv

Fig. 60: The GWS of a FEM - fatigue analysis................................F-159

Fig. 61: The GWS of FEM - local time series ..................................F-159

Fig. 62: The window "Geometry Cell" in the FEM approach .........F-169

Fig. 63: The window "Computation status".....................................F-170

Fig. 64: Information on jobs .............................................................F-171

Fig. 65: The window "Print" in Microsoft Windows........................F-177

Fig. 66: Window "Print" ...................................................................F-180

Fig. 67: Window "List of Printers"...................................................F-180

Fig. 68: Management of Non-FEM results......................................F-184

Fig. 69: list of results........................................................................F-184

Fig. 70: The window "Export(csv)..."................................................F-189

Fig. 71: The list of results in a result management window..........F-190

Fig. 72: The list of results exported into a csv-file (Excel)..............F-190Fig. 73: The window "Computation status" for a FEM-based

analysis................................................................................F-193

Fig. 74: The window "Info" for a FEM-based analysis....................F-194

Fig. 75: Selecting two Non-FEM result tasks for viewing..............F-198

Fig. 76: Displaying a Non-FEM result task ....................................F-199

Fig. 77: overlayed material property curves ...................................F-201

Fig. 78: cumulative load amplitude histograms..............................F-202

Fig. 79: variable amplitude life curves............................................F-203

Fig. 80: Design points of Non-FEM result tasks.............................F-204Fig. 81: List of life points .................................................................F-205

Fig. 82: Displaying weighted results of Non-FEM result tasks .....F-207

Fig. 83: Displaying the block version of Non-FEM result tasks.....F-208

Fig. 84: Displaying a Non-FEM result task as Rainflow-matrix ...F-209

Fig. 85: Displaying the damage matrix of a Non-FEM result

task ......................................................................................F-211

Fig. 86: Displaying the load-notch strain relations of Non-FEM

result tasks..........................................................................F-212

Fig. 87: Displaying the P constant amplitude life curves of Non-FEM result tasks ........................................................F-213

Fig. 88: Pressing Down adds the selected task to the lower list

box........................................................................................F-227

Fig. 89: The window "Damage selection" ........................................F-227

Fig. 90: Defining the damage reduction ..........................................F-228

Fig. 91: Defining the result directory ..............................................F-228

Fig. 92: The window "Define Stress-life Data Sheet" .....................F-236

Fig. 93: The area General Data for SN-Curves in the

window "Define Stress-life Data Sheet".............................F-239

Fig. 94: The window "Define Solution Parameter Set" in the

Stress-life Approach............................................................F-252


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F-xxvi LMS FALANCS User Manual

Fig. 95: The area Element in the window "Define Solution

Parameter Set"....................................................................F-253

Fig. 96: The area Strain-life Approach in the window

"Define Solution Parameter Set"........................................F-254

Fig. 97: The area Stress-life Approach in the window"Define Solution Parameter Set"........................................F-257

Fig. 98: The area Spot welds in the window "Define Solution

Parameter Set"....................................................................F-260

Fig. 99: The area General in the window "Define Solution

Parameter Set"....................................................................F-262

Fig. 100: The area Design Point in the window "Define

Solution Parameter Set" .....................................................F-264

Fig. 101: The area Computed Points in the window "Define

Solution Parameter Set" .....................................................F-266

Fig. 102: The area FEM/LTS: Local Stress State in the

window "Define Solution Parameter Set" ..........................F-268

Fig. 103: The window "Define Material Data Sheet"........................F-274

Fig. 104: The area Element in the window "Define Material

Data Sheet" .........................................................................F-275

Fig. 105: The area Manson-Coffin-Morrow Relation in the

window "Define Material Data Sheet" ...............................F-276

Fig. 106: The area Static Failure Data in the window "Define

Material Data Sheet" ..........................................................F-277

Fig. 107: The area Endurance Limit in the window "Define


Fig. 108: The area Ramberg-Osgood Relation in the window

"Define Material Data Sheet".............................................F-279

Fig. 109: The area Measurement in the window "Define


Fig. 110: The area Multiaxial material model (Jiang) in the

window "Define Material Data Sheet" ...............................F-281

Fig. 111: The panel General in the window "Define Method

parameters".........................................................................F-285Fig. 112: The panel NP FEM in the window "Define Method

parameters".........................................................................F-288

Fig. 113: The panel FEM Results in the window "Define

Method parameters" ...........................................................F-291

Fig. 114: The panel RP Filter in the window "Define Method

parameters".........................................................................F-296

Fig. 115: The panel Hot Spots in the window "Define Method

parameters".........................................................................F-298

Fig. 116: The panel LTS in the window "Define Methodparameters".........................................................................F-300

Fig. 117: Window "Job Setup Window" .............................................F-324


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Table of Illustrations F-xxvii

Fig. 118: Links to the description of supported elements.................F-461

Fig. 119: The PATRAN 75 Stress Result Menu................................F-465

Fig. 120: The PATRAN 75 Plot Option submenu..............................F-466

Fig. 121: PATRAN Tool Menu ...........................................................F-467

Fig. 122: PATRAN Tool Menu: Groups Wizard ................................F-467

Fig. 123: PATRAN Tool Menu: Properties Wizard ...........................F-468

Fig. 124: PATRAN Tool Menu: Materials Wizard ............................F-469


Fig. 126 ANSYS Toolbar ...................................................................F-478




Fig. 130: Links to the description of supported elements.................F-497Fig. 131: The CAT/FALANCS command window .............................F-499

Fig. 132: The images available in CAT/FALANCS...........................F-502

Fig. 133: Database directory does not exist ......................................F-510

Fig. 134: Error message when starting the DCT stand alone

without parameter ..............................................................F-511

Fig. 135: The window "Database Configuration Tool"......................F-513

Fig. 136: Define names of databases used in listings .......................F-524


Fig. 138: FULL FILE SPECIFICATION of a path name underUNIX....................................................................................F-623

Fig. 139: The simple Dang Van approach .........................................F-641

Fig. 140: The multiple points Dang Van definition ..........................F-642

Fig. 141: Window "Computation Status"...........................................F-645

Fig. 142: Window "Constant Amplitude Life-curve(s) / Stress-

strain curve(s) .....................................................................F-647

Fig. 143: Window "Creation of synthetic SN curves"........................F-651

Fig. 144: Window "Damage Selection" ..............................................F-655

Fig. 145: Window "Estimation Based on Uniform Material Law" ...F-659

Fig. 146: Window: Exit Confirmation................................................F-661

Fig. 147: Window "Geometry Cell Non FEM" ...................................F-663

Fig. 148: Window "Geometry Cell FEM"...........................................F-663

Fig. 149: Window "Geometry Work Sheet Non FEM" ......................F-667

Fig. 150: Window "Geometry Work Sheet FEM" ..............................F-668

Fig. 151: The menu File in the window "Geometry Work Sheet"....F-668

Fig. 152: The menu Initialize in the window "Geometry Work

Sheet"...................................................................................F-669

Fig. 153: The window "Parameter Definition" ..................................F-669

Fig. 154: The window "Taskname initialization"..............................F-670


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F-xxviii LMS FALANCS User Manual

Fig. 155: Window "Strain gage rosettes" ...........................................F-670

Fig. 156: The menu Edit in the window "Geometry Work Sheet" ...F-672

Fig. 157: The menu Check in the window "Geometry Work

Sheet"...................................................................................F-674

Fig. 158: The menu Navigate in the window "Geometry WorkSheet"...................................................................................F-675

Fig. 159: The menu Select in the window "Geometry Work

Sheet"...................................................................................F-676

Fig. 160: The menu OptionsTable Layout in the window

"Geometry Work Sheet" ......................................................F-678

Fig. 161: The menu OptionsGeometry Cell Window in the

window "Geometry Work Sheet" ........................................F-678

Fig. 162: The menu OptionsCheck for Duplicates in the

window "Geometry Work Sheet" ........................................F-679Fig. 163: The menu OptionsEdit Orientation in the

window "Geometry Work Sheet" ........................................F-679

Fig. 164: The icon bar in the window "Geometry Work Sheet"........F-680

Fig. 165: The table field in the window "Geometry Work Sheet

Non FEM"............................................................................F-682

Fig. 166: The table field in the window "Geometry Work Sheet

FEM"....................................................................................F-683

Fig. 167: The window "history reduction" .........................................F-685

Fig. 168: list of results........................................................................F-686Fig. 169: The window "Info"...............................................................F-689

Fig. 170: Window "Job Setup Window" .............................................F-691

Fig. 171: Window "Load History Calibration"...................................F-693

Fig. 172: Window "Load History Channel Information"...................F-695

Fig. 173: The window "Test Schedule Segment- Info" ......................F-697

Fig. 174: Panel "General"...................................................................F-699

Fig. 175: Panel "FEM"........................................................................F-701

Fig. 176: Window "result selection " ..................................................F-703

Fig. 177: Window "Setup information"..............................................F-707

Fig. 178: Window "Stress-life Curve(s)" ............................................F-709


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Purpose of LMS FALANCS and related tools F-1

Part 1

Purpose of LMS FALANCS andrelated tools


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F-2 LMS FALANCS User Manual - Purpose of LMS FALANCS and related tools


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Virtual Prototyping for Durability F-3

Virtual Prototyping for DurabilityThis chapter describes the three steps for durability processingexpected by LMS FALANCS .

3 steps for durability processing

LMS FALANCS supports the engineer during the virtualprototyping process by indicating the critical parts in the struc-ture with respect to durability, so that fatigue analysis can betaken into account in early stages of development.

This helps to shorten the durability development process byavoiding physical tests during the design phase.

Step 1: From external loads to internal forcesTo be able to perform a fatigue analysis on virtual components,it is necessary to know the forces that will act on the compo-nents.

This means, that as a first step in virtual prototyping for dura-bility internal forces acting on the components have to calcu-lated from given external loads (e.g. spindle forces).

At this point nonlinear effects in geometry and elements suchas dampers and springs have to be considered.

For this first step a multi body simulation of a dynamic finiteelement analysis (FEA) has to be performed.

Step 2: From internal forces to local stress tensor histories

The forces acting on the component lead to local pseudo stresstensor histories that are based on the theory of elasticity. Inthis step two cases have to be identified:


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The loading frequency lies below the lowest natural fre-quency:

Use quasi static superposition.

The loading frequency lies above the lowest natural fre-quency:

Use modal superposition.

Step 3: From stress tensor histories to damage

Fatigue damage is caused by initiation and the growth of shortcracks in the structure. But the given application determines

the individual damage model to be used.LMS FALANCS supports the following approaches/fatiguemodels

Stress-life approach for long life (high-cycle fatigue)

Strain-life approach for shorter life (low-cycle fatigue)

Seam weld analysis

Spot weld analysis


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LMS FALANCS: basic product and optional parts, licensing F-5

LMS FALANCS

: basic product andoptional parts, licensing

LMS FALANCS and related LMS products for virtualprototyping serve the engineer in different places and for dif-ferent purposes. Therefore you may decide which parts youneed and want to license.

In this manual the basic component and all the options of LMS FALANCS are described.

Please refer to your local LMS office for individual options wecan offer you and the pricing of the different modules.


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Interactive and batch mode F-7

Interactive and batch modeThe calculation times for non-FEM or proportional analysisruns are short. In these cases, it is most convenient to use LMS FALANCS interactively by starting the analysis and immedi-ately analyzing the results. However, the non-proportionalFEM analysis runs for large structures may take some timeand require more computational resources. Hence these runs

may be put in batch queues and the results may be analyzedafter completion.

LMS FALANCS offers batch processing from the commandline, e.g. for standard analysis runs. But the batch process mayalso be initiated from an interactive LMS FALANCS run. Thismeans you can define your analysis using the graphical userinterface just the same way as in the interactive analysis. Theonly difference is that the analysis job is not started immedi-ately but instead is queued as a batch process. The queuing

process may be customized to your local computing facilities.


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Related LMS FALANCS tools F-9

Related LMS FALANCS toolsThis chapter contains general information on the tool LMS FALANCS LifeStat.

LMS FALANCS LifeStat

LMS FALANCS LifeStat is a program to administrate, presentand evaluate data, which are documented within the scope of durability tests.

The data types supported by the LMS FALANCS LifeStat in-clude

Fatigue-life data

Stress-life data

strain-life material data.

For the different data types several selection methods areavailable in LMS FALANCS LifeStat. E. g., stress-life data isused to calculate SN-Curves.

With the LMS FALANCS LifeStat the data and the calculateddistributions and the SN-Curves can be displayed graphicallyas 2D diagrams. The data can be revised and printed with the

linked program LMS GIDAS .SN-Curves, calculated with LMS FALANCS LifeStat can beexported directly into the LMS FALANCS data base. The SN-Curves can be used in the "stress-life approach” for fatigue-lifedata in LMS FALANCS .


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Related LMS TecWare tools F-11

Related LMS TecWare toolsThis chapter gives general inforation on the LMS TecWaretools used in LMS FALANCS .

LMS TecWare MultiRain

LMS TecWare MultiRain provides methods for analysis andsynthesis of multiaxial, non-proportional load histories usingrainflow methods, which account for the phasing between loadchannels to maintain proper crack initiation locations and fa-tigue life in complex structures.

The methods provided in LMS TecWare MultiRain are basedon the unique rainflow counting. This method, which is themost accurate data reduction method available for durabilityload data analysis, has been extended to account for the phas-ing between load channels by monitoring cycles not just for theload channels itself, but also for linear combinations of the loadchannels (“rainflow projections”) - effectively monitoring “loca-tions on a virtual component”.


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Based on this approach, rainflow counting methods for up to 6input channels are available in LMS TecWare MultiRain. Themultiaxial rainflow matrices can be used for analysis, moni-toring and comparison of multiaxial loading events. Interactive

visual analysis of the load data is made possible with overviewdisplays - the unique LMS “Load Influence Sphere”™ or a barchart display - and a drill down capability showing rainflowmatrices for any linear combination of the load channels aswell as range-pair and level crossing displays and damage dis-tribution by load level.

LMS TecWare MultiRain Extension allows extrapolation, su-perposition and reconstruction of multiaxial rainflow matrices.Based on short measurements, the corresponding rainflow ma-trices can be extrapolated to more repetitions of the sameevent. Different sets of multiaxial rainflow matrices can becombined (superposition) and the resulting matrices can be

used for reconstructing representative time histories for multi-axial fatigue testing.


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LMS TecWare Time Edit and TimeView

LMS TecWare TimeEdit is a tool for viewing and editing time

series. LMS TecWare TimeView is a restricted version of LMS TecWare TimeEdit. In LMS FALANCS the tools are used tovisualize load history channels when loading them (see theparagraph Viewing Load Channels).

You may scale the axis using the mouse or enter the scaling inwindows.

You may page though the data or scroll through it.

The colors, line thickness, line type, maker type and the size of

the markers may be changed.

If you updated your Kernel to the LMS TecWare Kernel , you get the tool LMSTecWare TimeEdit that enables you to not only view but also to alter theloads.

For further information on LMS TecWare TimeEdit andTimeView see the paragraph LMS TecWare TimeEdit in themanual LMS TecWare - Volume II . You may view this chapterin the online-help or in the pdf-version. The online-help isopened by selecting the menu item HelpOverview in theLMS FALANCS main window "LMS FALANCS" and choosingthe corresponding entry. The pdf-version is located in the sub-directory manual of your LMS TecWare installation directoryand is named tecware_volume_2_en.pdf.


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LMS TecWare RainView

LMS TecWare RainView is a restricted version of LMS

TecWare RainEdit for displaying rainflow matrices. In LMS FALANCS it is used to view single input rainflow matrices andto visualize the result of a Non-FEM analysis as rainflow ma-trix in the window "RAINFLOW Matrix"(see the paragraphsViewing Load Channels and Rainflow-Matrix ).

There are a variety of features for displaying rainflow matricesincluding

zooming

scrolling display of residue

several marker types

3D-display

The rainflow matrix is surrounded by two sets of axes with dif-ferent scales. The left and the upper axis are scaled accordingto the number of bins. The right and the lower axis are scaledaccording to the physical units of your data. The unit is also

displayed next to these axes, if it was stored together with yourdata.

The available display modes of rainflow matrix elements are asfollows:

Squares

Bubbles of different sizes in color or b/w

3D solid bars in color or b/w

3D grid bars in color or b/w 3D lines in color or b/w

numbers.

You can also have the residue displayed. It is displayed bymeans of asterisks at the corresponding positions.


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Fig. 2: Display of a rainflow matrix: "3d lines" and "numbers"

If you updated your Kernel to the LMS TecWare Kernel , you get the tool LMSTecWare RainEdit that enables you to not only view but also to alter theloads

The part Visualization of Rainflow Matrices in the manualLMS TecWare - Volume II describes the window "RAINFLOW-Matrix" in detail. You may view this chapter in the online-helpor in the pdf-version. The online-help is opened by selecting themenu item HelpOverview in the LMS FALANCS mainwindow "LMS FALANCS" and choosing the corresponding en-try. The pdf-version is located in the subdirectory manual of your LMS TecWare installation directory and is namedtecware_volume_2_en.pdf.


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Part 2

First Steps

This part introduces the main concepts of the LMS FALANCS user interface.


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F-18 LMS FALANCS User Manual - First Steps


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Introduction to LMS FALANCS F-19

Introduction to LMS FALANCSThis chapter contains information on

starting and exiting LMS FALANCS

the Graphical User Interface and

the Geometry Work Sheet..

For a more detailed description of the user interface refer to

the Part 3 Reference – Graphical User Interface of this man-ual; for the background of fatigue refer to the LMS FALANCS Theory Manual and textbooks on this topic.

Starting LMS FALANCS

LMS FALANCS can be started in different ways: from the LMS TecWare Desktop by selecting the entry

FALANCS in the menu Modules.

from the command line by using the tecwareshell script byentering:tecware falancs

once an alias to the script or a path has been set to thetecware home directory (this is typically set during the in-stallation process). For a detailed description of the tecwareshell script see section Shell Scripts.

It is important to use the supplied shell script to start LMS FALANCS , since the program relies on a specific environ-ment to run in.

from Finite Element Tools by clicking on the LMS FAL- ANCS button in available finite element codes such as AN-SYSor postprocessors like MSC/PATRAN

from the CAT/FALANCS package by applying the StartFALANCS button.


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by batchfiles, which are discussed in detail in Part 4Reference—Batch Mode Interface, by entering

tecware falbatch []

on Microsoft Windows by pressing the Start button and se-lecting the menu entry ProgramsLMS TecWareLMSFALANCS:

Fig. 3: Starting LMS FALANCS on Microsoft Windows


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Exiting LMS FALANCS

You exit LMS FALANCS by selecting the menu item File

Exit and confirming your choice in the appearing message win-dow.

Fig. 4: The message window when exiting LMS FALANCS

Using the radio buttons you can decide what to do with thecreated temporary results:

Select the default value Remove temporary data, if youwant to delete all the result files that have been written

during the LMS FALANCS run. If you want to use the data outside of LMS FALANCS

choose the option Keep temporary data.

Remark: The temporary files are described in the section Parameter Sec- tion for LMS FALANCS Methods Result Specification in Part 5 Reference – General Settings of this manual. The directory where these files are writ-

ten to is displayed by choosing the Setup item in the Help menu (See theparagraph Menu item Help->Setup).

Select Yes on the message window to close all currently openedwindows of LMS FALANCS and exit the program, or select Noto return to the main window.


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Concepts of the Graphical User Interface

The Graphical User Interface (GUI) of LMS FALANCS is de-

signed to support various types of usersto perform a fatiguelife analysis. The main idea is to give a uniform and easy ac-cess to the necessary data. Material and analysis parametersare stored in databases such that it is possible to define themonce and just reuse them for an analysis.

The same type of GUI is provided for the stress-life and thestrain-life approach for both non-FEM and FEM analysis. Thedatabase entries can be used for both analysis types.

Different types of usage

The LMS FALANCS GUI is designed to support both the ex-pertand the non-expert user. The different approaches areshown in this section.

Perform the same analysis for different loads

In this case the complete analysis should be defined once andthe Geometry Work Sheet should be saved. To perform ananalysis with new loads, the user only has to

1. load the new load histories from the menu File

2. load this Geometry Work Sheet from the menu File and

3. replace the load channels by using the Geometry Cell.

Reuse material, solution and method parametersIn this case the LMS FALANCS main window supports theuser to choose all the necessary data.

1. follow the File menu:

load the necessary load histories and – for FEM analysis –the FEM result and set files. A bullet before the menu itemsindicates which selections are already done. For these fileselections the same GUI-window is used for all the selec-

tions.


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2. follow the menu of the approach to use for the analysis (i.e.stress-life approach or strain-life approach):

The parameter sets are selected by the database selectionwindows, and the load histories by the channel selection. Again, the bullets indicate which sets have already beenselected.

3. After all necessary data has been chosen, it is possible toopen a Geometry Work Sheet initialized with the selecteddata by selecting the menu item for the desired analysis.

Edit the Geometry Work Sheet using the Geometry Cell if necessary and start the fatigue analysis by selecting the OKor Apply button in the Geometry Work Sheet.

Perform a new analysis with different material andfatigue parameters

In this case, you have to follow the same steps as above but in-stead of reusing the same parameter sets, other database en-tries have to be selected or generated.

First check in the chapter Which data needs to be used for which process which parameters are necessary for a fatigueanalysis. After collecting the entries, select the according pa-rameter sets in the databases or create them following the in-structions in the chapter Operations on Databases in thismanual.


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Geometry Work Sheet

Selecting one of the menu items

Non-FEM: Fatigue Analysis Non-FEM: LTS Tensor Analysis

FEM: Fatigue Analysis

FEM: Local Time Series (LTS)

FEM: transient analysis

brings up the windows "Geometry Work Sheet" and "GeometryCell".

GWS for Non FEM Fatigue Analyses

For a non FEM fatigue analysis, the Geometry Cell containsone row listing the task, material data file name, solution pa-rameter set and load influence factor c for the analysis. The cfactor can be thought of as a stress concentration factor thatmultiplies the load sequence file after the offset and factorhave been applied. This can be modified by -clicking on the cell

and changing the values in the "Geometry Cell" window. Applying the factor and the to the load sequence in the window"Load History Calibration" can be thought of as converting aload sequence (that is proportional to elastic stress) with anyunits, into a nominal stress history with units of MPa. The cfactor is then the stress concentration factor that is used torelate the nominal stress history to the local stress history,which is then used in the fatigue analysis.

GWS for FEM Fatigue Analyses

The interface for an FEM fatigue analysis is quite similar. Inthis case the stresses induced by normalized loads are readfrom a result file written by an FEM analysis tool. The wholestructure can be analyzed for fatigue even if the structure con-tains several parts made of different materials, or is connectedby seam welds. The individual parts are put into element sets

and individual material parameters and solution parameterscan be applied.


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Starting an Analysis from the GWS

Select OK in the "Geometry Work Sheet" to start the fatigueanalysis. You will be asked if you would like to keep the geome-

try table field. You may find it useful to keep the geometry ta-ble field until you have viewed the results.

Saving GWS

Geometry work sheets can be saved and reused for similaranalysis runs.

See the paragraphs Perform the same analysis for different

loads and Perform a new analysis with different material and fatigue parameters for further information.


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Common Analysis Steps F-27

Common Analysis Steps Analyses are defined by a set of parameters and performed ona couple of load history channels. The according GeometryWork Sheets (GWS) may be saved for further usage andprinted for documentation. All analysis results may be savedand on Non-FEM results a history reduction may be per-formed.

The selection of load histories, parameter sets, Geometry WorkSheets (GWS) and computed results is done in several selectionwindows. In the following general information on parameterdatabases and the various selection types in LMS FALANCS isgiven.

Parameter DatabasesIn LMS FALANCS the parameters that define an analysis areorganized in parameter databases.

LMS FALANCS delivers some default databases located in thesubdirectory \pdb of your TecWare installation directory. Ad-ditionally the user may create his own databases and savethem in any directory. He may use the parameter data sets of the default databases, modify existing parameter data sets and

define new parameter data sets.The solution parameters and the material parameters (resp.SN curves) are assigned to individual tasks, whereas themethod parameters are the same for a complete analysis run.

The parameters used may be stored and printed with the Ge-ometry Work Sheet to document the analysis.

There are three categories of parameter databases:

General global databases


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are defined in the file falancs.ini located in the subdirec-tory \data of your LMS TecWare installation directory.They are available for all LMS FALANCS users on yoursystem. Here you find the standard databases delivered byLMS Deutschland GmbH .

Global databases

are defined in the file falancs.ini located in the subdirec-tory \custom of your LMS TecWare installation directory.They are available for all LMS FALANCS users on yoursystem.

Local databases

are defined in your personal file falancs.ini located inyour local directory (as defined in the general global initiali-zation file tecware.ini located in the subdirectory \dataof your LMS TecWare installation directory). They areavailable for your access only.

See the Part 7 Databases for detailed information on databaseconfiguration

Database selection

The selection procedures of stress-life curves, material parame-ters, solution parameters and method parameters have a uni-form user interface.

The data set management is done from the database selection

windows loading existing data sets

creating new data sets

editing existing data sets

saving data sets

viewing the properties of a data set in a data sheet

displaying stress-live curves and material data graphically

deleting data sets


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Common Analysis Steps F-29

See the paragraphs Selection of Data from a Database andOperations on Data Sets for a detailed description of the data-base selection windows and the data set management.

File selection

The file selection is used for all operations that need to read orwrite to the file system. It has facilities to check the input for-mat of the load and the directory browser can handle standarddirectories that can be defined in the tecware.ini configura-

tion file. There exist versions for single file selection and mul-tiple file selection.

For each file type (i.e. load history files, FE result files, etc.)you can specify your favorite file format that is preselectedwhen entering the file selection window.

See the paragraph Selection Windows in LMS FALANCS for adetailed description of the file selection windows.

Channel selection

The channel selection, load case selection, test schedule seg-ment selection and element set selection have a uniform userinterface. Channels to select can also be previewed.

See the paragraph Selection Windows in LMS FALANCS for adetailed description of the channel selection windows.


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A standard Non-FEM stress life analysis F-31

A standard Non-FEMS

tress-

life Analysis

To perform a non-FEM stress-life analysis you

1. collect the input data

2. start the Geometry Work Sheet (GWS)

3. modify the GWS if necessary

4. start the calculation.

The following paragraphs describe these steps in detail for avery simple damage calculation. The used data is stored insubdirectories of your LMS TecWare installation directory:

data subdirectory

load histories \demo\general

stress-life curves \pdb\examples\snc

method parameter sets \pdb\examples\mparam

solution parameter sets \pdb\examples\sp_stress

Remark: This chapter describes only a very simple damage calculation. Seethe LMS FALANCS Examples & Verification Manual for additional and

more advanced example calculations.


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Collecting Input Data for Non-FEM Analyses

A non-FEM stress-life analysis requires the following input:

load history channels one or more stress-life curves

one method parameter set

one or more solution parameter sets

See the chapter Which data needs to be used for which proc - ess for a more detailed list.

The analysis is performed on all possible combinations (tasks)

of the loaded input channels, solution parameters and stress-life curves using the selected method parameter set.

How to load some load history channels

Load history channels are stored in load history files. Thus youhave to load a load history file before you may select one ormore of its channels. You may mix channels of time series andRainflow matrices.

You load a load history channel by performing the followingsteps:

1. Select the menu item FileOpen Load History Files inthe window "LMS FALANCS".

The file selection window "Load History File Selection" ap-pears.

2. Select:

File type RPC-III

Search in DEMO_General

File plate_high_frq.rsp


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3. Press Open

The file selection window is closed and the menu item File

Open Load History Files is ticked off.4. Select the menu item Stress-life ApproachLoad Histo-

ries in the window "LMS FALANCS"

The channel selection window "Load History Selection" ap-pears.

5. Select:

File plate_high_frq.rsp

Channel 001_ANTISYM


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6. Press OK

The channel selection window is closed and the menu item

Stress-life ApproachLoad Histories is ticked off.


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How to load a stress-life curve

You load a stress-life curve by performing the following steps:

1. Select the menu item Stress-life ApproachStress-lifeCurves in the window "LMS FALANCS"The database selection window "Selection of Stress-life DataSheets" appears.

2. Select:

Database Examples

SN Curve plate_example

3. Press OK

The database selection window is closed and the menu itemStress-life ApproachStress-life Curves is ticked off.


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How to load solution parameters

You load a solution parameter set by performing the followingsteps:

1. Select the menu item Stress-life ApproachSolutionParameters in the window "LMS FALANCS"

The database selection window "Selection of Solution Pa-rameter Sets" appears.

2. Select:

Database Examples

Solution parameter Default


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3. Press OK

The database selection window is closed and the menu itemStress-life ApproachSolution Parameters is tickedoff.


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How to load method parameters

You load a method parameter set by performing the followingsteps:

1. Select the menu item Stress-life ApproachMethod Pa-rameters in the window "LMS FALANCS"

The database selection window "Selection of Method Pa-rameter Sets" appears.

2. Select:

Database Examples

Method parameter Default


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3. press OK

The database selection window is closed and the menu itemStress-life ApproachMethod Parameters is ticked off.


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"Stress life Approach - Geometry Work Sheet" indicates theused approach.

Marking a table entry or the fourth column head fills the

according fields in the window "Geometry Cell":

Fig. 6: The window "Geometry Cell" (non-FEM stress-life analysis)

The method parameters are not listed in the window "Ge-ometry Cell" but the channel calibration and the Geometry

are given for each channel.

How to change entries in the GWS

To modify an entry in the GWS you

1. select the entry

The background color of the selected field changes to blackand the corresponding field in the window "Geometry Cell"

is filled accordingly and gets sensitive.2. perform the changes in the window "Geometry Cell"

by entering directly the new value in the sensitive textbox

(the background color of a sensitive text box is white)

or

by pressing the sensitive Search button near the field


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and selecting another data in the appearing selectionwindow (data sets and load histories) or setting new val-

ues in appearing parameter windows (e.g. for channelcalibration)

3. press Apply

The GWS is updated.

Remark: The currently selected method parameter is applied to all tasks of aGWS. It's name is not displayed in the GWS. You change the method pa-

rameter by selecting the menu item InitializeMethod parameter... and

selecting another data set in the appearing database selection window "Se-lection of Method Parameter Sets".

Examples for editing the GWS

Two examples for modifying GWS entries by editing the corre-sponding text boxes:

task number

old entry new entry

1 nonFEMstress1

Fig. 7: Editing a task number in the GWS

channel geometry

old entry new entry

1 2

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