Skip to content
English
Contact support Access my support tickets
Not a customer ?
  • There are no suggestions because the search field is empty.

Advanced Simulation · Lesson 2: Control and plasticity

Force or displacement control, solution instabilities, bilinear von Mises plasticity.

Lesson goal

Get a difficult nonlinear study to converge and analyze a part that exceeds the yield strength.

▶

2 videos

✎

1 exercise

Advanced

↳

Prerequisite: Lesson 1

1. Watch the videos

Dassault Systèmes videos hosted on MySolidWorks: they open in a new tab and a free account is enough. Watch them in order.

Controlling Nonlinear SimulationVideo 1▶Controlling Nonlinear SimulationForce and displacement control methods, resolving instabilities and comparing results.↗ Metal PlasticityVideo 2▶Metal PlasticityBilinear von Mises plasticity model, effect of mesh quality and reading results over time.↗

2. Key takeaways

1

Force control imposes the load; it can become unstable when the structure loses stiffness.

2

Displacement control imposes a displacement and often succeeds where force control fails, provided you adapt the boundary conditions.

3

A stress beyond the yield strength in a linear study has no physical meaning: it is the signal to use a plasticity model.

4

The bilinear von Mises model describes the material with two slopes: elastic, then strain hardening.

Tip

In a yielded area, mesh quality directly affects the calculated stress: refine the critical area before drawing conclusions.

3. Do the exercise

On a steel bracket that exceeds the yield strength in linear static analysis:

  • note the maximum stress of the linear study
  • create a nonlinear study with a bilinear von Mises material
  • compare stresses and displacements at several points of the time curve
✓To check: In the nonlinear study, the maximum stress no longer far exceeds the yield strength: it follows the strain hardening slope of the material.

Stuck on the exercise or on a real part?

With Ohmycare, your dedicated engineer works through the topic with you in a 30-minute session, on your own files.

Book a session