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Introduction to
Ansys LS-DYNA

Course Overview

This course cov­ers the ba­sic ca­pa­bil­i­ties of LS-DY­NA. De­tailed de­scrip­tions and re­quire­ments are giv­en for da­ta prepa­ra­tion with ex­am­ples. Pre- and post-pro­cess­ing us­ing LS-Pre­Post is al­so cov­ered. This course is rec­om­mend­ed for those who per­form non­lin­ear sta­t­ic and tran­sient sim­u­la­tions. At­ten­dees work­ing in near­ly all fields of en­gi­neer­ing will ben­e­fit. This course is a pre­req­ui­site for the ad­vanced cours­es cov­er­ing the multiphysics ca­pa­bil­i­ties which in­clude com­press­ible and in­com­press­ible flu­ids, the airbag par­ti­cle method, Ar­bi­trary Lagrangian­-Euler­ian (ALE) flu­ids, ther­mal, acoustics, vi­bro-acoustics, met­al form­ing, elec­tro­mag­net­ics, dis­crete el­e­ments, fail­ure, fre­quen­cy re­sponse method­ol­o­gy, and iso­ge­o­met­ric analy­sis.

Prerequisites

  • Basic knowledge of Finite Element Analysis and Engineering Concepts 

Teaching Method

Lectures and computer practical sessions to validate acquired knowledge.

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Learning Outcome

Following the completion of this course, you will be able to

  • Understand the keyword structure of LS-DYNA and edit keyword files
  • Choose the explicit solution method and employ mass scaling to affect the timestep
  • Understand and choose a variety of contact types and measure part interactions
  • Define common engineering materials to include nonlinear response and failure
  • Navigate result files and use LS-PrePost to verify and validate model behavior
  • Choose beam, shell and solid element formulations for speed and accuracy
  • Distinguish between an acceptable "Normal Termination" and incorrect results

Available Dates

Currently, no training dates available

Learning Options

Training materials for this course are available with a Ansys Learning Hub Subscription. If there is no active public schedule available, private training can be arranged. Please contact us.

Agenda

This is a 2-day classroom course covering both lectures and workshops. For virtual training, this course is covered over 5 x 2-hour sessions lectures only.

Virtual Classroom Session 1

  • Lecture 1: Introduction
  • Lecture 2: Explicit Theory

Virtual Classroom Session 2

  • Lecture 3: Solution Setup
  • Workshop: Keyword Editing
  • Workshop: Ball Impacting Plate
  • Lecture 4: Results and Postprocessing
  • Workshop: Postprocessing with LS-PrePost

Virtual Classroom Session 3

  • Lecture 5: Contact Modeling
  • Workshop: Tube Crush
  • Lecture 6: Material and Failure Modeling
  • Workshop: Tensile Test

Virtual Classroom Session 4

  • Lecture 7: Element Formulation and Hourglass Control
  • Workshop: Element Form/HG Control
  • Lecture 8: Restart

Virtual Classroom Session 5

  • Lecture 9: Debugging and Guidelines
  • Workshop: Closing Exercise
Live Classroom Topics Covered

Day 1

  • Lecture 1: Introduction
  • Lecture 2: Explicit Theory
  • Lecture 3: Solution Setup
    • Workshop: Keyword Editing
    • Workshop: Ball Impacting Plate
  • Lecture 4: Results and Postprocessing
    • Workshop: Postprocessing with LS-PrePost

Day 2

  • Lecture 5: Contact Modeling
    • Workshop: Tube Crush
  • Lecture 6: Material and Failure Modeling
    • Workshop: Tensile Test
  • Lecture 7: Element Formulation and Hourglass Control
    • Workshop: Element Form/HG Control
  • Lecture 8: Restart
  • Lecture 9: Debugging and Guidelines
    • Workshop: Closing Exercise
  • Course Outline
  • History
  • Finite Element Simulation
  • Sample LS-DYNA Conference Presentations
  • Sample Simulations
  • FE Analysis (pre-processors, solvers, post-processors)
  • Detailed Example
  • LS-DYNA Input Deck
  • Using LS-PrePost
  • Details of Post-Processing
  • 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 Shells
  • 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
  • Selectively-Reduced Integration
  • Hourglass Phenomenon
  • Contact and Slide Surfaces
  • Friction
  • Damping
  • Restart
  • Quasi-Static Simulations
  • Why static analysis with explicit code
  • Mass Scaling