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Non-Linear Implicit Analysis in Ansys LS-DYNA

Course Overview

LS-DYNA is the market leader for explicit finite element program that is used to perform large deformation analysis. LS-DYNA has its own implicit solver that is capable of solving complex non-linear structural problems. This course will introduce users to theoretical and practical background of LS-DYNA’s implicit capabilities. This course is suited for users that have knowledge and experience from using LS-DYNA or for users who have extensive experience of other implicit solvers.

Prerequisites

  • Knowl­edge of Ansys LS-DY­NA.

Teaching Method

Lectures with hands-on workshop problems.

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Learning Outcome

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

  • Benefit from utilizing existing LS-DYNA model in the group, thereby eliminating the need to convert the model to different programming language to solve implicitly.
  • Potentially save in software costs per year.

 Available Dates

Currently, no training dates available

Learning Options

Training materials for this course are available with an 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

  • Introduction
  • Reality vs. Simulation
  • Implicit vs. Explicit

Virtual Classroom Session 2

  • Implicit in LS-DYNA
  • Overview of LS-DYNA Implicit Keywords
  • Importance of linear Solvers

Virtual Classroom Session 3

  • Convert Explicit to Implicit
  • Time step approaches
  • Solution explorer – GUI approach to convert Explicit to Implicit

Virtual Classroom Session 4

  • Newton methods
  • Integration schemes
  • Accuracy considerations
  • Constitutive models and boundary conditions

Virtual Classroom Session 5

  • Implicit contact – MORTAR CONTACT
  • Debugging, troubleshooting divergence
Topics Covered Live Classroom
  • Brief in­tro­duc­tion to LS-DYNA
  • Reality vs. Simulation
  • Implicit vs. Explicit
  • Implicit integration schemes
  • Linear solvers and their importance
  • Implicit specific keywords
  • Non­lin­ear im­plic­it sta­t­ic & dy­nam­ic analy­sis
  • Eigen­val­ue analy­sis: op­tions, mod­el­ing as­pects, in­ter­mit­tent out­put
  • El­e­ment types for lin­ear & non­lin­ear analy­sis
  • Ma­te­r­i­al mod­els for im­plic­it analy­ses
  • Con­tact types for im­plic­it: op­tions, tied con­tacts, slid­ing con­tacts with Mor­tar op­tion
  • Trou­bleshoot­ing con­ver­gence prob­lems
  • Tips & Tricks.
  • Fi­nal guide­lines with check­list of most im­por­tant set­tings for im­plic­it cal­cu­la­tions

Day 1
  • Introduction
  • Reality vs. Simulation
  • Implicit vs. Explicit
  • Implicit in LS-DYNA
  • Overview of LS-DYNA Implicit Keywords
  • Importance of linear Solvers
  • Convert Explicit to Implicit
  • Time step approaches
  • Solution explorer – GUI approach to convert Explicit to Implicit

Day 2

  • Newton methods
  • Integration schemes
  • Accuracy considerations
  • Constitutive models and boundary conditions
  • Implicit contact – MORTAR CONTACT
  • Debugging, troubleshooting divergence

 

 

 

 

 

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