Copyright by A. Tabiei Training in€¦ · · 2011-11-25Copyright by A. Tabiei 2 About A. Tabiei ... LSDYNA Applications to Protective Structures, Blasts, Vehicle mines, and Home

Multi-Physics Simulation Engineering

Copyright by A. Tabiei

1

Training in

Blast and Penetration

Using LSDYNA

Course Notes Developed &

Presented by

Al Tabiei

[email protected]

MPSE

mailto:[email protected]



2

About A. Tabiei

Dr. Tabiei has been a consultant on the use of large scale finite element simulation for more than 20 years to more than 60 large and small companies and government labs in the US and abroad. He was the director of the Center of Excellence in DYNA3D Analysis at the University of Cincinnati (1997-2001). His primary work focus is in the area of multi-physics simulations, crash simulation, impact simulation, and material model development for isotropic and composite materials. Dr. Tabiei lectures nine different short courses to many government and industrial research centers and companies nationally and internationally on the use of LSDYNA for various applications. He also does code development for LSTC. He was consultant to the US government on the use of simulation for the design of weapons of mass destruction. He was also on a NASA team for the return to the moon program to investigate different landing scenarios (2006-2010). He has a BS in Mechanical Engineering, MS in Aeronautical Engineering from the Wichita State University, MS in Mathematics, and a PhD in Aerospace Engineering from the University of Cincinnati. Dr. Tabiei’s expertise is in the area of computational mechanics and numerical simulation.



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Previous Course Customers

1. The Army Research Lab, Aberdeen proving ground, USA

2. The Army Research Lab, Weapons and Material Directorate, USA

3. The Air-force Research Lab, Ammunition Directorate, Eglin Air-force Base, USA

4. BAE Systems, Santa Clara, USA

5. ETA Engineering, USA

6. US Army Corps of Engineering, Waterway Station, Vicksburg MS, USA

7. Alyotech corporation, Paris, France

8. TU Dleft Research Center, Dleft, the Netherland

9. Tubitak, Marmara Research Center, Istanbul, Turkey

10. 8th LSDYNA European Conference, Strasbourg, France



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SHORT COURSES TOUGHT BY

Al TABIEI

1. Intro LSDYNA (2 days or 3.5 days)

(Introduction to Explicit FE Simulation)

2. Advance Impact Course Using LSDYNA (2 days)

(Comprehensive Explicit FE options for crash and impact)

3. Material Modeling and User Defined Options (2.0 days)

(strain rate effect, plasticity, hyperelasticity, viscoelasticity, composites, etc.)

4. Implicit LSDYNA and Springback (2.0 days)

(Implicit FE Formulation and multi-step simulations)

5. Multi-Physics LSDYNA (2.5 days)

(Thermal-Structural)

(Fluid Structure Interaction)

(Fluid/structures/thermal Interaction, Acoustics)

6. Composite Materials (2.0 days)

7. Contact in LS-DYNAS (2.0 days)

8. LSYNA dummies (1.0 days)

9. LSDYNA Applications to Protective Structures, Blasts, Vehicle mines, and Home Land Security (2 days)

10 LSPREPOST (geometry and meshing, 2 days)



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ACKNOWELEDGMENTS

The author wishes to thank several people for valuable comments and discussions on the notes. Firstly, Dr. J. Hallquist’s LSDYNA code is a great help in constructing the lecture notes. Thanks also goes to the LSTC staff for their support and discussions specially Mr. Jim Day.

Dr. Ala (Al) Tabiei, Consultant

[email protected]

MPSE

4056 Granite Ct.

Mason, OH 45040

USA

These Notes are copyright by Tabiei’s Publishing Services. All rights are reserved.



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Outline

1-Introduction

– Introduction to Wave Propagation

Wave propagation in incompressible material

Wave propagation in compressible material

– Numerical Techniques to solve High energy problems

Lagrangian

Eulerian and ALE

SPH

EFG

– Sample applications

2-Blast & Penetration

– Blast Wave Simulations Techniques

– Applications:

Vehicles

Underwater Structures

Buildings with Windows



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Outline (continues)

3-Material Behavior Under Sever Loading

– Strain Rate Effect

– Material Models Library

– What is Available That Works for the Defense Problems

Isotropic

Composites

Soil

Concrete

4-Failure and Damage Modeling

– Fracture

– Damage

– Element Erosion

5-Hybrid-III Dummy Response to Blast

– Dummy models

– Dummy response to blast



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Outline (continues)

6-Blast Mitigation Structures

– Blast Mitigation Concepts

– Blast Mitigation Civil/Structures

– Seat Design for Blast Mitigation

7-Bomb Modeling

– Shape charges, EFP, & IED

– Bomb fragmentation modeling

8-Modeling Techniques

– Mesh design

– Problem initialization

– Post-processing

9-Impact Data Reduction and analysis

– Filtering the data

– Intermittent eigen value analysis

10-Workshop

– Several training workshop problems are presented



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Sample Applications

IED



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Sample Applications

Mine



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Sample Applications

Airplan impact



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Sample Applications

Blast on pressure vessels



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Sample Applications

Dam blast



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Sample Applications

Penetration fuse survavibility



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Sample Applications

Underwater blast



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Sample Applications

Body Armor



workshops

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Documents

Copyright by A. Tabiei Training in€¦ · · 2011-11-25Copyright by A. Tabiei 2 About A. Tabiei ... LSDYNA Applications to Protective Structures, Blasts, Vehicle mines, and Home