LS Dyna | JVKR ENGINEERING AND SOLUTIONS

LS Dyna

System Perspective

OS Platform Windows XP Professional (32 or 64 bit version) Or Windows 7 (Service Pack 1) or higher versions of windows.
Physical Memory 2 GB RAM (minimum)
Disk Space for Installation 5 GB free disk space
Resolution 1280×1024 pixels (DEDICATED VIDEO MEMORY IS REQUIRED for Better performance)
LS Dyna Software

AnSYS LS Dyna R 8.0

Student's Perspective

  • Concepts of 2D and 3D drawing.
  • Enthusiastic for converting one’s imagination in real time 3D model.
  • Theoretical FEA and FEM knowledge will be added advantage.

Course Content

Introduction: ANSYS LS-DYNA is the most commonly used explicit simulation program, capable of simulating the response of materials to short periods of severe loading. Its many elements, contact formulations, material models and other controls can be used to simulate complex models with control over all the details of the problem.

ANSYS LS-DYNA has a vast array of capabilities to simulate extreme deformation problems using its explicit solver. Engineers can tackle simulations involving material failure and look at how the failure progresses through a part or through a system. Models with large amounts of parts or surfaces interacting with each other are also easily handled, and the interactions and load passing between complex behaviors are modeled accurately

Course Description

  • 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 Post processing

# Detailed Capabilities-Keyword Format

# Material Nonlinearity

  • Execution and Output Files
  • ASCII
  • Binary
  • 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)
  • 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

Course Outcomes

Upon completion of the Course, the student will be able to describe the functional capabilities and general usage of:

  • Build and represent the physical structure of the model including basic meshing, shell thickness definition, and element definition
  • Define nonlinear material definition
  • Define constraints, boundary conditions, and initial conditions
  • Define contacts
  • Be introduced to the concept of time step for explicit time integration (“conditionally stable”)
  • Define output measurements
  • Post process the model

Advantages

Dummy models used in crash simulations that are developed by dummy manufacturers, are generally developed for LS-DYNA. Faster ROI, due to fewer physical prototypes and test setups

LS-DYNA handles transient dynamic problems which include nonlinearities resulting from

    • Contacts
    • Large deformation
    • Nonlinear material behavior

Example applications that are considered transient and dynamic include, but are not limited to

    • Crash
    • Ballistics
    • Stamping
    • Highly nonlinear quasi-static events

Additional Benefit: Hands on Experience and demo includes industry based real time problems.