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HyperWorks Solvers 2017.1 Release Notes HyperWorks Solvers is a collection of finite element and multibody dynamics solvers for structural, fluid-dynamics and systems simulation. These solvers can be employed for simulation driven design as well as design optimization. OptiStruct Design and optimization software using finite elements and multibody dynamics RADIOSS Finite element solver for linear and nonlinear problems MotionSolve Multibody dynamics solver AcuSolve General purpose finite element computational fluid dynamics (CFD) solver HyperXtrude Solver Finite element based solver for simulating metal extrusion, polymer extrusion, friction stir welding, billet forging, and resin transfer molding processes

HyperWorks Release Notes - Altair · HyperWorks Solvers 2017.1 Release Notes HyperWorks Solvers is a collection of finite element and multibody dynamics solvers for structural, fluid-dynamics

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Page 1: HyperWorks Release Notes - Altair · HyperWorks Solvers 2017.1 Release Notes HyperWorks Solvers is a collection of finite element and multibody dynamics solvers for structural, fluid-dynamics

HyperWorks Solvers 2017.1 Release Notes

HyperWorks Solvers is a collection of finite element and multibody dynamics solvers for structural,

fluid-dynamics and systems simulation. These solvers can be employed for simulation driven design as

well as design optimization.

OptiStruct Design and optimization software using finite elements and multibody dynamics

RADIOSS Finite element solver for linear and nonlinear problems

MotionSolve Multibody dynamics solver

AcuSolve General purpose finite element computational fluid dynamics (CFD) solver

HyperXtrude

Solver

Finite element based solver for simulating metal extrusion, polymer extrusion,

friction stir welding, billet forging, and resin transfer molding processes

Page 2: HyperWorks Release Notes - Altair · HyperWorks Solvers 2017.1 Release Notes HyperWorks Solvers is a collection of finite element and multibody dynamics solvers for structural, fluid-dynamics

OptiStruct

Highlights

Altair OptiStruct is an industry proven, modern structural analysis solver for linear and non-linear

mechanical problems under static, dynamic, and thermal loads. It is the market-leading solution for

structural design and optimization. Based on finite-element and multibody dynamics technology, and

through advanced analysis and optimization algorithms, OptiStruct helps designers and engineers

rapidly develop innovative, lightweight and structurally efficient designs. OptiStruct is used by

thousands of companies worldwide to analyze and optimize structures and mechanical systems for

strength, durability, noise and vibrations, heat transfer, as well as impact.

Note: The OptiStruct 2017.1 Documentation is only available as a PDF document named

OptiStruct_2017.1_Documentation_Updates.pdf within the

<Altair_Home>\hwsolvers\optistruct\ folder in the installation.

The major items for the 2017.1 release are:

Joint elements support for a variety of situations

Advanced Restart for nonlinear analysis

Continuum shells

Random Response based Fatigue Optimization

Multi-Material Topology Optimization

Topology Restart with different mesh size or configuration

In this Release

Stiffness, Strength and Stability

Noise and Vibrations

Composites

Thermal Analysis

General Updates

Optimization

Solvers and Performance

Resolved Issues

Page 3: HyperWorks Release Notes - Altair · HyperWorks Solvers 2017.1 Release Notes HyperWorks Solvers is a collection of finite element and multibody dynamics solvers for structural, fluid-dynamics

Stiffness, Strength and Stability

Joint Element Support

Universal, Revolute, Ball, Axial, Cartesian, Cardan, In-plane, In-line, and Orient joints are supported

using the JOINTG bulk entry.

Additionally, joint motion (MOTNJG bulk data entry) are supported for the following JOINT types:

Axial, Cartesian, In-line, Cardan, Revolute.

Neuber Correction with Nonlinear Contact

Neuber correction is now available in nonlinear static analysis, which will allow the combination of

Nueber correction with nonlinear contact/gap analysis (including with PARAM,FASTCONT).

Advanced Restart Functionality with Nonlinear Analysis

The following scenarios are currently supported for the nonlinear restart option using the RESTARTR

and RESTARTW I/O option entries.

Restart from the last point at which the initial run was interrupted (for example, due to a

power outage).

Restart from some point of a successful nonlinear analysis and append new nonlinear

subcases in continuation.

Restart from some point of a nonlinear analysis, truncate the nonlinear subcase at that

point and append new nonlinear subcases in continuation. This is supported by using the

TERMI option on the RESTARTR entry.

Restart from some point of a successful nonlinear analysis and append new linear

STATSUB(BUCKLING/PRELOAD/BRAKE) subcases. The linear

STATSUB(BUCKLING/PRELOAD/BRAKE) subcases should reference the ending nonlinear

subcase.

Continuous Sliding(CONSLI) Now Supports Node-to-Surface (N2S) Contact

Continuous Sliding(CONSLI) now supports Node-to-Surface (N2S) contact

MODCHG Support for CONM2, Shells and CBUSH Elements

MODCHG supports additional element types such as CONM2, shells and CBUSH elements.

CWELD Can Reference More Than 9 Elements

The CWELD patch can now extend to more than 9 elements.

MPCF Support for Intermediate Nonlinear Steps (NLOUT)

MPCFORCE output is now available for intermediate nonlinear steps (NLOUT)

Contact Search Distance (SRCHDIS) Including the Plate Thickness

Contact Search Distance(SRCHDIS) now considers the thickness of plate during searching.

Node Set in TIE

With node set specified (GSETID) on continuation line on TIE bulk entry, TIE contact is generated for

Page 4: HyperWorks Release Notes - Altair · HyperWorks Solvers 2017.1 Release Notes HyperWorks Solvers is a collection of finite element and multibody dynamics solvers for structural, fluid-dynamics

the specified node set regardless of SRCHDIS. If some grids are within SRCHDIS but if they are not

included in GSETID, then TIE contact won’t be generated for those grids.

Rotational Degrees Of Freedom to be Constrained in Large Displacement TIE and Contact

with Freeze for Node-to-Surface(N2S)

Rotational DOFs will be constrained in large displacement TIE and Contact with Freeze for Node-to-

Surface(N2S).

Page 5: HyperWorks Release Notes - Altair · HyperWorks Solvers 2017.1 Release Notes HyperWorks Solvers is a collection of finite element and multibody dynamics solvers for structural, fluid-dynamics

Noise and Vibrations

SOLUTION Option Support in PFGRID

The SOLUTION option is available on the PFGRID output request. This option allows the user to

select a set of frequencies with SET (bulk and case control set) to process and output the

participation. This is equivalent to the previously supported FREQUENCY option.

Rotation Output Available for RMS Displacement, Velocity, and Acceleration

Rotational component for RMS displacement, velocity, and acceleration is now available using the

ROTA option on each output request.

POWERFLOW Calculation with SECTION for Solid Elements

The SECTION Bulk Data Entry defines the cross-section of interest and the FLOW option on the

SECTION entry identifies the section for POWERFLOW calculations. The area and subsequent

calculations provides both powerflow and intensity output.

ERP Results Normalized by Total Panel Area

ERP results will be normalized by total area if PARAM,ERPAREA,YES is set. PARAM,ERPAREA is a new

parameter and NO is the default.

Page 6: HyperWorks Release Notes - Altair · HyperWorks Solvers 2017.1 Release Notes HyperWorks Solvers is a collection of finite element and multibody dynamics solvers for structural, fluid-dynamics

Composites

Continuum Shells

Continuum shells (solid shells) are available for linear analysis and nonlinear analysis (with small

and large displacement). The material types supported are MAT1 and MAT9(ORT).

Different Failure Criteria for Different Plies

The MATF bulk data supports various failure criteria and this will allow each ply to have its own

failure criteria.

Tensor Format Support in H3D file for CSTRESS and CSTRAIN Entries

TENSOR option is now available in CSTRESS/CSTRAIN output request in H3D file format. The default

is still the scalar format.

Page 7: HyperWorks Release Notes - Altair · HyperWorks Solvers 2017.1 Release Notes HyperWorks Solvers is a collection of finite element and multibody dynamics solvers for structural, fluid-dynamics

Thermal Analysis

Thermal Contact with FREEZE Considers the Actual Contact Opening

Thermal contact with FREEZE considers the actual contact opening based on the geometry. This is

supported for steady state and the transient thermal analysis.

Page 8: HyperWorks Release Notes - Altair · HyperWorks Solvers 2017.1 Release Notes HyperWorks Solvers is a collection of finite element and multibody dynamics solvers for structural, fluid-dynamics

General Updates

GPSTRAIN for Solids/Shells are Available in mnf Output

GPSTRAIN for solids/shells are available in mnf output

SET Based Definition of FORCE/MOMENT/TEMP/PLOAD1/PLOAD2

SET of GRID/ELEMENT can be referenced by FORCE/MOMENT/TEMP/PLOAD1/PLOAD2 instead of

listing one GRID/ELEMENT IDs for those entries.

PARAM,MAXRATIO Available to Detect Modeling Issues (Unconnected Structure)

This feature is to detect the singularity of the model by checking the ratio of diagonal of original

matrix with factor matrix. If the ratio is higher than the value specified on PARAM,MAXRATIO,

OptiStruct will error out.

ESE Calculation in DMIG During the Residual Run (Static and Normal Mode Analysis)

Strain Energy will be calculated for DMIG in residual run for static and normal mode analysis. This is

only possible when the stress and strain are both requested during DMIG generation run.

OUTPUT,MASSPROP Activated by Check-Run

Mass/Inertia output with OUTPUT,MASSPROP is now available with a check-run.

Enhancement on Grid Replication Format

Following new syntax is supported for Grid Replication format.

GRID,901001,,,,,-1

=,*1,,,,,=

=100

This is to generate 100 grids, starting from 901001 with increment of 1.

Subcase-based Punch Files with POST TOFILE

POST TOFILE supports PUNCH file, which also allows the multiple set of PUNCH files from the same

subcase (using REPCASE).

BUFFSIZE Default Changes to 65537 in PARAM, SYSSETTING

BUFFSIZE default changes to 65537 in PARAM, SYSSETTING

Mass and Inertia Output from RBODY

Mass and Inertia from RBODY is now available in the .rbody.info file.

Exclude CMASS1/2/3/4 from PARAM,GRDPNT Output

GRID POINT WEIGHT GENERATOR output with PARAM,GRDPNT will not include the contribution from

CMASS1/2/3/4 based on the new PARAM,GRDPNTCM,YES/NO. YES is the default.

Page 9: HyperWorks Release Notes - Altair · HyperWorks Solvers 2017.1 Release Notes HyperWorks Solvers is a collection of finite element and multibody dynamics solvers for structural, fluid-dynamics

Optimization

Topology Restart with Different Mesh or Configuration

Restart job with different mesh size or the configuration (remove or add some part) is allowed. To

use this feature, DOPTPRM,TOPDV should be added in original topology optimization run before the

restart. Additionally, DOPTPRM,TOPRST is required in the restart run.

Multiple-Material Topology Optimization

Multi-material topology optimization can find the optimum material layout and additionally can select

the optimum material from the set of materials provided by the user. MMAT continuation line is

added in DTPL to activate this feature. The different material IDs will be specified in MMAT

continuation line.

Loading as Design Variable (DVLREL1)

Scale factor and the component of vector for FORCE and MOMENT can be design variable thru

DVLREL1 entity.

Enhanced Reliability-based Optimization (RBDO) with Two-phase Approach

Two-phase approach based on sequential approximation is implemented and used as a core

algorithm for RBDO. With the two-phase approach, the first phase allows the optimization to quickly

approach the optimum design, and the second phase improves the accuracy of reliability

assessment. Some tests indicate that this two-phase approach in 2017.1 can assess and target the

reliability requirement with higher accuracy compared to the old method.

Mass Normalized Sensitivity Output

MASS/NOMASS option is added for OUTPUT,H3DTOPOL and OUTPUT,H3DGAUGE. This output is

effective only when the mass response is included in optimization problem.

Normalized Constraint Violation Plot in .hist.mvw File

This output will be triggered by OUTPUT,HGHIST,n (n =>32) and contains the plot for response

divided by its constraint bound.

Optimization with Curved Shells

Optimization with PARAM,CURVSHl2 is now supported.

Result Monitoring for Optimization Runs is Now Supported

Result Monitoring for optimization runs is now supported. The NLMON bulk data and subcase pair or

PARAM,NLMON can now be used for optimization.

More Significant Digits for Excel Sensitivity Output

The number of significant digits in Excel sensitivity output is extended to 8.

PUCK Failure Criteria as Optimization Response

PUCK failure criteria is now available for optimization. The PUCK, PUCK-T, PUCK-B, and PUCK-O

codes are now available on the CFAILURE response type for DRESP1 entry.

Page 10: HyperWorks Release Notes - Altair · HyperWorks Solvers 2017.1 Release Notes HyperWorks Solvers is a collection of finite element and multibody dynamics solvers for structural, fluid-dynamics

Most Recent Iteration’s Analysis Results for Optimization

CURRENT option is added in OUTPUT,H3D to request the H3D file for analysis in current optimization

iteration. This H3D file (filename_cur.h3d) will be updated for each iteration to contain the most

recent iteration results. This option has to be used together with BYITER as

OUTPUT,H3D,CURRENT,BYITER.

Single H3D File for OUTPUT,H3DTOPOL/H3DGAUGE

Only one H3D file will be generated for H3DTOPL/H3DGAUGE instead of one for each iteration.

Enhanced OUTPUT, H3DSENS Output Request

Two additional options BYITER and COMB are now available. H3DSENS, BYITER (default) indicates

that multiple *_dsa.#.h3d files are output for multiple iterations (#). H3DSENS, COMB indicates that

a single combined *_dsa.h3d file is output for all iterations.

HM.comp, HM.ent, and HM.conn Files from Topology Optimization is Now Available in TCL

Format

HM.comp, HM.ent, and HM.conn files from Topology optimization are now available in TCL format.

Random Response Based Fatigue Optimization

Random Response Based Fatigue optimization is available. SN fatigue is supported and the

Life/Damage is calculated and optimized for shells/solids, and spot welds(CBEAM/CBAR, CWELD).

DDM is supported with Random Response Based Fatigue optimization to enhance performance.

PEAKOUT Support for Density

DENSITY results for topology optimization is only output for loading frequencies found by PEAKOUT.

Optimization with MODCHG (only CONTACT) is Allowed

Optimization is now supported for models in which removing or reactivating contacts is done with

MODCHG entry.

PARAM, NLINISOL is Now Supported for Nonlinear Optimization Runs

In the optimization process involving nonlinear solutions, for subsequent optimization iterations, the

solution of nonlinear problem will start, when feasible, from converged nonlinear solution from the

previous optimization iteration (rather than repeating the entire incremental nonlinear process). This

can save computational time. This behavior is ON by default and activated only for non-path

dependent problems. PARAM,NLINISOL,NO will disable this mechanism so that the subsequent

optimization iteration always starts from the beginning of the nonlinear solution going through the

entire incremental process.

Page 11: HyperWorks Release Notes - Altair · HyperWorks Solvers 2017.1 Release Notes HyperWorks Solvers is a collection of finite element and multibody dynamics solvers for structural, fluid-dynamics

Solvers and Performance

PARDISO

New direct solver type, PARDISO, is available thru SOLVTYP bulk entry/subcase selector. PARDISO

could be more efficient than other supported solver for shell type of structure when many SMP cores

(-nt, -nproc script option) are specified. PARDISO is supported for linear and nonlinear static

analysis.

NLOUT is Defined with DDM Enhancements

Lower memory/disk requirement with DDM for Nonlinear analysis when NLOUT is defined.

Disk Space Estimate in out File Now Includes MUMPS Requirement

Disk space estimate in out file now includes MUMPS requirement.

MPI Version of Complete 64 bit Version of OptiStruct is Available

MPI version of complete 64 bit version of OptiStruct is available. This is also activated using the -i64

run option.

DDM Enhancement with 64-bit OptiStruct

DDM can now handle more than 1 Billion non-zero stiffness terms if –i64 run option is used.

DDM Support for Nonlinear Transient Analysis

DDM is now supported for Nonlinear Transient Analysis.

min-core Option is No Longer Supported for MUMPS Runs

The min-core option is no longer supported for MUMPS runs.

Page 12: HyperWorks Release Notes - Altair · HyperWorks Solvers 2017.1 Release Notes HyperWorks Solvers is a collection of finite element and multibody dynamics solvers for structural, fluid-dynamics

Resolved Issues

The following issues have been resolved in OptiStruct 2017.1 Resolved Issues

PCONTHT with FREEZE generated incorrect conductivity in previous releases, this has now

been fixed.

Fluid eigenvector for Complex eigenvalue analysis with Acoustics could be incorrect if rigid

elements are in the model. This is now resolved.

Shape optimization run for buckling with nonlinear static subcase which includes contact/gap

would result in programming error. This has been fixed.

Resolved HWSolver GUI issue which leads to incorrect results for nonlinear analysis.

PFMODE(FLUID) with SPCD could produce incorrect results, which has now been fixed.

PEAKOUT Structural response was considered with DBA while calculating peak loading

frequencies.

CSTRESS/CSTRAIN for transient analysis was incorrect when SET is used for output. This has

been resolved.

Gauss point results output were not available with nonlinear transient. This is now available.

Zero sensitivity occurred for GE on CELAS4, this has now been fixed.

Inertia results on OUTPUT,MASSPROP could be incorrect for beam/bar elements. This has

since been fixed.

Corner plastic results could be incorrect with DDM mode. This has been resolved.

OUTPUT,FSTOSZ had an issue for PSHELL when the multiple DSIZE entries exist in input file.

This is now resolved.

Page 13: HyperWorks Release Notes - Altair · HyperWorks Solvers 2017.1 Release Notes HyperWorks Solvers is a collection of finite element and multibody dynamics solvers for structural, fluid-dynamics

MotionSolve

Highlights

MotionSolve is a state-of-the-art multibody solver available in HyperWorks. It has a complete set of

modeling elements and powerful numerical methods to support a full set of analysis methods. The

accuracy, speed and robustness of MotionSolve have been validated through extensive testing with

customer models and test data. MotionSolve also offers unmatched compatibility with ADAMS/Solver

input.

In version 2017.1, MotionSolve brings new capabilities, added functionalities to the existing capabilities

and improvements in performance.

MotionSolve Model as an FMU

With version 2017.1, you are now able to export your MotionSolve model into a Functional Mockup

Unit (FMU) which can then be imported into any 1D simulator environment (like sT/Activate) for co-

simulation. This capability enables you to:

Easily add multi-physics to your MBS model by including thermal, electrical and control

systems via a co-simulation environment like Activate, for example

Interface with MODELICA based components

Connect with other solvers that support the FMI standard

For more information, please refer to the User’s guide on FMI support.

Define Multiple MotionSolve Plants in solidThinking Activate

With version 2017.1, you are now able to add multiple MotionSolve models into your sT/Activate

model. This capability enables you to:

Co-simulate with more than one MotionSolve model in parallel within the Activate

environment

Each MotionSolve plant can leverage Activate’s component and Modelica library

Enhanced Performance for 2D Rigid Body Contact

Performance enhancements have been made for the contact detection when using 2D curves for

modeling rigid body contact in MotionSolve. With version 2017.1, you can expect to see significant

speedup in your simulation wall clock time. This speed up is most noticeable for models that have a

large number of contacts – up to 7 times.

Resolved Issues

NLFE bodies and compliant joints

Previously, MotionSolve failed to run if all the joints defined on an NLFE body were made compliant.

This is fixed with 2017.1 such that you may define any kind of joint on an NLFE body and

successfully simulate the model.

Defining JFLOAT marker on NLFE bodies

In MotionSolve, you cannot define the JFLOAT marker on a flexible body, such as the NLFE body.

Previously, if you did so, the solver would fail without an appropriate message. With 2017.1, an

appropriate error message has been added that can help you debug your model and remove any

JFLOAT markers defined on the NLFE body.

Page 14: HyperWorks Release Notes - Altair · HyperWorks Solvers 2017.1 Release Notes HyperWorks Solvers is a collection of finite element and multibody dynamics solvers for structural, fluid-dynamics

Difference in extrapolation results between FIESUB 810 and FIESUB 910

In 14.0.230, it was reported that extrapolation results between field subroutine FIESUB810 and

FIESUB910 are different when expected to be the same. This behavior has been modified with

2017.1 such that both subroutines produce the same extrapolation results.

Eigen modes not orthogonal

It was reported that the eigenmodes are not orthogonal using 14.0.230. This has been fixed in

2017.1. The eigenmodes calculated now are orthogonal.

PINVAL affects eigensolution

In 14.0.230, it was reported that use of the expression PINVAL affects the eigen solution. This has

been fixed in 2017.1, the use of PINVAL no longer changes the eigen solution.

KE function

The KE function that calculates the kinetic energy of a rigid or flexible body was scaled incorrectly.

The scaling has been corrected with 2017.1.

Page 15: HyperWorks Release Notes - Altair · HyperWorks Solvers 2017.1 Release Notes HyperWorks Solvers is a collection of finite element and multibody dynamics solvers for structural, fluid-dynamics

RADIOSS

Highlights

Airbags: fabric material LAW58 enhancements allow to reproduce accurately elastic hysteresis

in the tissue

Composites: output per ply

Tied contact: automatic kinematic/penalty switch for slave nodes subjected to other kinematic

conditions

Plastic strain rate formulation implemented for LAW36 (piecewise linear material) and LAW87

(BARLAT 2000)

FSI:

New output available in ANIM files (specific energy and artificial viscosity for LAW51, detonation

time for LAW5 and LAW51)

LAW51: several important fixes

Note: The RADIOSS 2017.1 Documentation is only available as a PDF document named

RADIOSS2017.1_Documentation_Updates.pdf within the <Altair_Home>\

2017.1\hwsolvers\radioss\ folder in the installation.

Airbags

New unloading test data input for /MAT/LAW58 (FABR_A): Unloading test data for direction 1 (warp)

direction 2 (weft) and shear can be input directly in LAW58 to better model the hysteresis behavior

during loading and unloading cycles.

Composites

Output for composites has been extended to improve usability:

Contour plots can be made by ply

Contour plots of damage from the /MAT/LAW25 internal failure model. Previously it was

only possible to plot damage defined with /FAIL.

Ply IDs are included in the engine output messages during the running of the simulation.

For example, if failure is reached in a given integration point, the ply_ID is also printed

Robustness improvements for the ply-xfem shell property: The delamination option activated by

/PROP/STACK, Plyxfem =2 is now more robust.

Materials and Failures

Plastic strain rate dependency option for /MAT/LAW36 (PLAS_TAB) and /MAT/LAW87

(BARLAT2000): A new flag was added to make the tabulated yield stress and plastic strain

functions correspond to either total strain rate or plastic strain rate.

Strain rate dependency for analytic Swift-Voce formulation in /MAT/LAW87 (BARLAT2000):

When using the analytic Swift-Voce formulation option, strain rates effect is taken into

account using input to the Cowper Symonds expression. The strain rate can be either total

strain rate or plastic strain rate.

Thermal information in User Subroutines: User subroutines can now utilize thermal

information from a RADIOSS analysis.

Properties

Page 16: HyperWorks Release Notes - Altair · HyperWorks Solvers 2017.1 Release Notes HyperWorks Solvers is a collection of finite element and multibody dynamics solvers for structural, fluid-dynamics

Fully Integrated quad element for 2D analysis: A new fully integrated quad element was

implemented which avoids hourglass deformation in 2D analysis. See /ANALY for more details.

Connectors and Kinematic Conditions

Automatic switch of TYPE2 Tied contact from kinematic to penalty formulation: Two new

/INTER/TYPE2, Spotflag are available 27 and 28. These new options replace Spotflag= 26 since it

was found to over-constrained master segments shells. These new formulations will use the

kinematic formulation by default and switch to the penalty method used by Spotflag=25 when

incompatible kinematic conditions are detected. Spotflag=27 uses the kinematic Spotflag=0

formulation while Spotflag=28 uses the kinematic Spotflag=1 formulation.

Contacts

Darmstad friction law has been modified: In the following contacts /INTER/TYPE5, 7, 19,

20, 21, 24 the static friction coefficient, FRIC, was added to the friction calculation.

Contact segment deletion for /INTER/TYPE24: In cases of material failure, the contact

segment deletion option,Idel=2, was implemented for /INTER/TYPE24

Contact Interface TYPE19 Usability Improvements: Contact defined using a TYPE19

interface is now converted into a TYPE7 surface to surface symmetric contact (TYPE7 +

TYPE7sym) and a TYPE11 edge to edge contact. The output from all these contacts is

summed together and available in one time history /TH/INTER output.

I/O and Initial State

Simplified solid element integration point result output: /ANIM/BRICK/TENS/STRESS(or

STRAIN)/ALL can be used to request stress or strain values at all integration points of solid

elements

Parameters defined for entity ID: /PARAMETER can now be used to define parameters for

entity IDs in a model.

Messages

Missing /SUBSET are now warning messages: Instead of an error message, a warning message will

now be listed if the subset ID defined on /PART is missing.

FSI

New outputs are available:

/ANIM/ELEM/ENER : The specific energy (energy/mass) for /MAT/LAW51 is now output for

submaterial

/ANIM/ELEM/TDET : animation for detonation times available for JWL EOS in /MAT/LAW5

and /MAT/LAW51.

/ANIM/ELEM/QVIS : output artificial viscosities for /MAT/LAW51 submaterials.

Resolved Issues

Composites:

TETRA4 and TETRA10 elements with /PROP/TYPE6: definition of orthotropic axis was not

being used.

Page 17: HyperWorks Release Notes - Altair · HyperWorks Solvers 2017.1 Release Notes HyperWorks Solvers is a collection of finite element and multibody dynamics solvers for structural, fluid-dynamics

Materials and Failures:

/MAT/LAW42 or /MAT/LAW69 and /VISC/PRONY: Poisson effect was incorrect when using

shells.

When using /FAIL/CHANG, a time step reduction occurs during the failure phase.

Instability with LAW62 and viscosity for low Poisson numbers

/MAT/LAW38 time step calculation in starter output was incorrect

FAIL CHANG ENERGY HASHIN and TENSSTRAIN damage implementation for shells was

improved

In /MAT/LAW24 an issue with non zero dilatancy parameters was corrected

Properties:

/TETRA10 + small strain + Single Precision: large rigid body rotations are incorrect

Contacts

/INTER/TYPE24: Possible wrong orientation of contact forces in case of sliding and T or X

connection for shells

/INTER/TYPE24: Possible failure (NaN at the first cycle ) in SPMD mode on Linux platform

/INTER/TYPE19: possible wrong contact forces output in T01

I/O and Initial State

Starter gives an ERROR message referring to unexisting Function/Table ID

Run fails w/AMS in SMP if slave node of an RBE3 is not connected to the mesh

Run fails w/SPMD 48 domains (even with /DT/NODA)

.tmp file used to create ABF file are automatically removed

Corrected an issue with local coordinate system output of /TH/SHELL

Improvements and Optimization of /OUTP files

FSI

LAW51: Formulation update which fixes possible overestimated sound speed and artificial

viscosity values

LAW51: Fix for possible “NEGATIVE RHO ERROR” while using plastic submaterial

LAW51: Possible differences in numerical solution depending on threads number

LAW51: Fix possible SPMD issue with New Outlet (Iform=6)

LAW51: New outlet (Iform=6) now enabled with explosive submaterial

/ANIM/ELEM/QVIS : fix zero contour if used with LAW51

Miscellaneous

/XREF for solid elements not compatible with single precision

Page 18: HyperWorks Release Notes - Altair · HyperWorks Solvers 2017.1 Release Notes HyperWorks Solvers is a collection of finite element and multibody dynamics solvers for structural, fluid-dynamics

Message

Output an ERROR if Isolid=12 is used with Ismstr=10 due to incompatibilities

Page 19: HyperWorks Release Notes - Altair · HyperWorks Solvers 2017.1 Release Notes HyperWorks Solvers is a collection of finite element and multibody dynamics solvers for structural, fluid-dynamics

HyperXtrude Solver

Highlights

Altair HyperXtrude is a suite of finite element solvers for simulating metal extrusion, polymer

extrusion, metal rolling, friction stir welding, billet forging, and resin transfer molding processes. It

has process specific features for each of these processes and supported with an easy use interface for

setting up model data.

HyperXtrude for Metal Extrusion

Enhancements to Quenching Solver

The quenching solution module in the solver can simulate:

Spray cooling

Air nozzle cooling

Air fan cooling

Immersion quenching

Click2Extrude™ Metal 2017.2 features an easy to use interface that can setup spray cooling with

just few mouse clicks. In this context, many enhancements were made to the quenching solver, this

also includes grain size predictions. Click2Extrude is the only available interface for the solver. Even

though it supports only for spray cooling in 2017.2 version, users can manually setup other quench

types with this interface.

Enhancements to Bearing Friction Module

Bearing friction module is improved to increase the accuracy of nose prediction. This is mainly in the

context of hollow profiles.

Resolved Issues

There was an issue in parsing FEM decks and this issue has been resolved.

Solver is now enabled to use Solver Node licensing.

HyperXtrude for Resin Transfer Molding

Resolved Issues

Solvers had license issues on both Windows and Linux platforms. These have been resolved.

Solver is now enabled to use Solver Node licensing.

HyperXtrude for Billet Forging

Resolved Issues

Page 20: HyperWorks Release Notes - Altair · HyperWorks Solvers 2017.1 Release Notes HyperWorks Solvers is a collection of finite element and multibody dynamics solvers for structural, fluid-dynamics

Solvers had license issues on both Windows and Linux platforms. These have been resolved.

Solver is now enabled to use Solver Node licensing.

Page 21: HyperWorks Release Notes - Altair · HyperWorks Solvers 2017.1 Release Notes HyperWorks Solvers is a collection of finite element and multibody dynamics solvers for structural, fluid-dynamics

AcuSolve

Highlights

AcuSolve v2017.1 further improves Altair’s class leading solver technology. The current release

includes significant fundamental improvements to multiphase capabilities, enhancements to distributed

scripts and improved material modeling.

Improvements to Multiphase

In this intermediate release we continue to build upon our initial multiphase offering by significantly

improving stability and accuracy. While still considered to be a Beta feature multiphase in AcuSolve

is steadily improving to handle more industrial-level cases.

AcuTherm

Data can now be output per element from acuTherm by specifying the command line option –to

abaqus.

AcuProbe

Variable lists have been reorganized by type for better readability and navigation.

Notable Changes

Added support for Piecewise-Bilinear fluid properties.

acuLiftDrag script has been added to the distribution, available in the bin directory

Resolved Issues

Resolved a segmentation error with acuMeshSim involving mixed topology extrusion meshes and

mixed topology boundary layer meshes.