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Training Course Descriptions

Obtaining a Converged Solution with Abaqus

Objective:

Obtaining converged solutions for highly nonlinear simulations can sometimes be challenging. Difficulties can arise, especially in simulations involving contact, complicated material models, and geometrically unstable behavior. Many years of practical experience in understanding and resolving convergence issues have been condensed into this course.

Using both workshops and practical examples in the lectures, you will learn:

  • How nonlinear problems are solved in Abaqus
  • How to develop Abaqus models that will converge
  • How to identify modeling errors that cause models to experience convergence difficulties
  • How to recognize when a problem is too difficult or too ill-posed to be solved effectively

Who should attend:

This course is recommended for engineers with experience using Abaqus/Standard.

Agenda (May vary with location)

Day 1Introduction to Nonlinear FEA
Workshop: Nonlinear Spring
Nonlinear FEA with Abaqus/Standard
Solution of Unstable Problems
Why Abaqus Fails to Find a Converged Solution
Workshop: Beam Lift-Off
Convergence Issues: Contact
Day 2Workshop: Element Selection
Convergence Issues: Element Behavior
Convergence Issues: Constraints and Loading
Convergence Issues: Material Behavior
Workshop: Limit Load Analysis
Workshop: Ball Impact

Many assembly processes involve highly nonlinear motions of the components. Obtaining a converged solution is challenging when components snap together, as occurs when the pipe is pushed into the plastic clip. The nodes shown in red havedifficulties resolving the changing contact conditions in the assembly. This seminar will explain the modeling techniques necessary to solve such challenging problems.

Course was last updated May 2007

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