Integrate nonlinearities into your analyses with Altair Optistruct™

While remaining in the static field, this training developed by our engineers will provide answers on the impact of nonlinear materials and contact with friction on your mechanical systems. The best practices of convergence will be discussed.


Engineers working with OptiStruct or having in-depth knowledge on a similar solver (Nastran, Abaqus, Ansys). 'Introduction to linear analysis with OptiStruct' training is a recommended prerequisite for this seminar.

Training objectives

  • Know and understand the different nonlinearities
  • Understand the maps necessary for their modelling
  • Know how to generate nonlinear analysis data, analyse it, and correct it
  • Post-process nonlinear results

Training description


  • Convergence methods
  • Sources of nonlinearities in OptiStruct
  • Management of the calculation process and output increments
  • Scalable loading

Nonlinearity of materials

  • Definition
  • Elasto-plastic material
  • Hyper-elastic materials
  • Data generation in HyperMesh

Geometric nonlinearity

  • Definition
  • Large displacements
  • Large deformations
  • Large contact slips
  • Following forces

Nonlinearity of contact

  • Definition and data generation in HyperMesh
  • Different formulations and parameterisations
  • Post-processing and specific results
  • Fast contact
  • Thermal behaviour

Buckling calculation

Post-processing with HyperView/HyperGraph

  • Contours display
  • Information extraction

General information

  • Chaining of load case
  • Activation / deactivation of parts and contacts
  • Screw pre-tension (1D and 3D)
  • Recommendations and tips


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