Introduction to LS-DYNA

Objective

Learn how to run LS-DYNA to solve engineering problems. Detailed descriptions are given of the data required to run LS-DYNA analysis. Examples are used to illustrate the points made in the lectures.

Audience

This course is recommended for engineers who want to use LS-DYNA to perform nonlinear static and dynamic impact simulations. Engineers working in the aerospace, automotive, and civil, manufacturing, packaging industries and government organizations will benefit from this course. This course is useful for engineers and researchers who are working in the area of deformation and strength of isotropic, composite, and most common materials as well as those who are working on biomechanics problems.

Notes

Intro to LS-DYNA Instructors: Depending on dates will be either Dr. Ala (Al) Tabiei Or Professor John Reid. Lectures begin daily at 9:00 a.m. and run until 5:00 p.m., except for the last day when the course concludes at 12:00 p.m. The classroom machines are PCs running Linux (CA) or Windows (MI).

For information on the classes contact class@lstc.com

Contents

  • Course Outline
  • History
  • Finite Element Simulation
    • Sample LS-DYNA Conference Presentations
    • Sample Simulations
  • FE Analysis (preprocessors, solver, postprocessors)
  • Details of an Example (Tube Collapse)
    • LS-DYNA Deck
    • Using LS-POST
    • Details of Postprocessing
  • Detailed Capabilities-Keyword Format
  • Material Nonlinearity
  • Running LS-DYNA
    • Execution and Output Files
      • ASCII
      • Binary
  • Output Control
  • FE Modeling Techniques
    • Engineering a FEA Model
    • Element Selection
      • Discrete (formulation of elastic and nonlinear elastic spring)
      • Beam
      • Shell (description of the various shell formulations)
      • Solid (description of the various solid formulations)
      • Thick Shell
    • Boundary, and Initial Conditions, Symmetry
    • Modeling for Physical Phenomenon
    • Ad-Hoc Guidelines
    • How to Tell if your Results are Correct
      • Error, debugging, and other useful information (d3hsp)
  • Time Integration
    • The Equations of Motion
      • Implicit
      • Explicit
  • Explicit Time Integration
    • Time Step Calculation
  • Reduce–Selective Integration
  • Hourglass Phenomenon
  • Contact and Slide Surfaces
    • Friction
  • Damping
  • Restart
  • Quasi-Static Simulations
    • Why Static Analysis With Explicit Code
      • Mass Scaling