CAD: COMSOL - Nonlinear Structural Materials Module

CAD: COMSOL - Nonlinear Structural Materials Module
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The Nonlinear Structural Materials Module augments the mechanical capabilities of the Structural Mechanics and MEMS Modules by adding nonlinear material models, including large strain plastic deformation capabilities. When the mechanical stress in a structure becomes large, certain nonlinearities in the material properties force the user to abandon linear material models. This situation also occurs in some operating conditions, such as high temperature. The module adds elastoplastic, viscoplastic, creep, and hyperelastic material models. User-defined material models based on strain-invariants, flow rules, and creep laws can easily be created directly in the user interface with the built-in constitutive laws as a starting point. Material models can be combined as well as include multiphysics effects. The included tutorial models illustrate this by showcasing combined creep and elastoplasticity, thermally induced creep and viscoplasticity, fluid-structure interaction, and elastic waves.

In this classic benchmark, a circular bar is subjected to a uniaxial tensile test resulting in large deformations. The bar experiences large scale plasticity and necking in its central cross section. This simulation is made possible by the large strain plasticity option available in the Nonlinear Structural Materials Module and the new and very powerful Double Dogleg solver.

Note: To use any of the COMSOL Modules, a COMSOL Multiphysics Base License pass is required. All module software is included with the COMSOL Multiphysics download file, which means you need to download only once.

Licensing Requirements or Restrictions

  • Access is authorized within the geographic boundaries of Canada only.
  • Use of this design tool is restricted to university research only.
  • Faculty with a Professor Research Subscription receive access that allows you, your students, and your research staff to access COMSOL software.
  • Five concurrent use instances per tool from the subscriber’s research team, up to the limits of the available licenses in the shared pool.
  • Access for one year 
  • Acceptance of the vendor licenses terms, including the Academic Addendum, on first use.

For more information, contact the Licensing Administrator at or call 613-530-4787.

Acknowledging CMC

If your research benefits from products and services provided by CMC Microsystems, please acknowledge this support in any publications about your work. For more information, please visit Acknowledge CMC.