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Sample Course Notes

Getting Started with LS-DYNA

Getting Started with LS-DYNA Implicit

Getting Started with LS-DYNA FSI

Getting Started with LS-DYNA Blast & Penetration

Workshop Descriptions

Workshop Getting Started with LS-DYNA

Workshop Getting Started with LS-DYNA Implicit

Workshop Getting Started with LS-DYNA FSI

Workshop LS-DYNA Blast & Penetration

WORKSHOP DESCRIPTION

Some of the courses have mandatory workshops. The workshop is included in the course. Taking the course would be equivalent to physically taken the course at LSTC since they are taught by the same instructor. Each workshop is described by the instructor and time will be given to perform each workshop by the instructor or independently by the students. The students can talk to the instructor online or using phone or VOIP (the workshop course is very interactive with the instructor) at any time they desire. At the end of the workshop course the instructor provides all the solutions to the workshops in a pdf file. Some of the courses the workshop will be conducted by the instructor in a life manner.

LS-DYNA FSI

This course will allow LS-DYNA users to get started on using LSDYNA for Fluid Structure Interaction (FSI) problems. The most important elements to start using LS-DYNA for such problems will be presented.

Introduction

1. When to use Eulerian and ALE
2. Sample applications

Eulerian capabilities

1. Euler and ALE element library
2. Boundary conditions
3. Equations of state

Basic concepts of arbitrary Langrange-Euler (ALE)

1. When to use ALE
2. Advantages of ALE formulation

Basic concepts of Multi-Material

1. When to use multi-material
2. Advantages of multi-material formulation

Basic concepts of fluid/structure coupling

1. Different coupling methodologies
2. When to use them

Modeling techniques

1. Mesh design
2. Problem initialization
3. Post-processing

COURSE DESCRIPTIONS

Intro LS-DYNA

This course will allow first time LS-DYNA users to get started with minimal effort. The most important elements to start using LS-DYNA successfully will be presented in the 16 hours with about 8 hours of workshop.

  • Chapter-0 : Introduction – LS-DYNA Manager
  • Chapter-1 : Introduction to LS-PrePost
  • Chapter-2 : Minimum Requirement to Run LS-DYNA
  • Chapter-3 : Choosing Elements
  • Chapter-4 : Choosing a Material Model
  • Chapter-5 : Applying Loads
  • Chapter-6 : Initial Conditions
  • Chapter-7 : Boundary Conditions
  • Chapter-8 : Defining Contact
  • Chapter-9 : Output Control and Databases
  • Chapter-10 : Critical Time Step
  • Chapter-11 : Hourglassing
  • Chapter-12 : Connecting Parts
  • Chapter-13 : Damping
  • Chapter-14 : How To Tell If Your FE Model Is Correct
  • Chapter-15 : Summary
  • Chapter-16 : Other Courses & References

LS-DYNA Implicit

1. Implicit versus Explicit
2. Equilibrium, Nonlinearity, and Linearization
3. Activating the Implicit Solver
4. Material Models and Element Types
5. Contact for Implicit
6. Eigenvalue Analysis
7. Dynamic Analysis using Modal Results

8. Additional Implicit Features

  • Explicit-Implicit Switch
  • Buckling Analysis
  • Control Implicit Termination
  • Inertia Relief
  • Consistent Mass
  • Condensation10. Implicit in MPP

9. Springback
10. Implicit in MPP
11. Linear Equation Solver
12. Practical Guidelines
13. Trouble Shooting and Ways to Battle Divergence
14. Summary

Fracture, Damage, and Failure in LS-DYNA

Course Outline

Introduction and Historical Review

  • Brittle Failure
  • Ductile Failure

Introduction and Fundamental Theoretical Concepts

  • Failure Theories
  • Damage Models
  • Fracture Mechanics

Element Erosion Advantages & Short Comings
Current LSDYNA Capabilities to Model Failure and Damage
Current LSDYNA Capabilities to Model Fracture
Fracture in Lagrangian, Eulerian, SPH, XFEM, EFG, and DEM Methods
LSDYNA Fracture Capabilities Verification examples
MAT_ADD_EROSION and the GISSMO Model
Material Models with Failure

  • Isotropic Materials
  • Hyperelastic Materials
  • Composite Materials
  • Geotech Materials

Modeling Delamination and Debonding in LSDYNA

  • Cohesive Elements
  • Tied Contact with Failure

Summary and Concluding Remark