Selecting the Physics Models and Materials

Select physics models to set up a static linear analysis and specify the beam material.

The physics models define the primary variables of the simulation and which mathematical formulation is used to generate the solution. In this simulation, the structure displacement and the internal stress distribution are computed using the linear Sparse Direct Solver, that is enabled when you select the Solid Stress model.
注As the Solid Stress model has specific mesh requirements, you are advised to select the physics models before you set up the mesh operations. Following this workflow prevents you from selecting incompatible meshers.
  1. Create a physics continuum and rename it to Beam Physics.
  2. For the physics continuum, Beam Physics, select the following models:
    Group box Model
    Space Three Dimensional
    Time Steady
    Material Solid
    Optional Models Solid Stress
    Material Law Models (selected automatically)
Select an appropriate material for the beam from the Simcenter STAR-CCM+ material library:
  1. Right-click the Beam Physics > Models > Solid > Al node and select Replace with...
  2. In the Replace Material dialog, expand the Material Databases > Standard > Solids node and select UNSS44600 (Ferretic Stainless Steel).
Define the material law that approximates the behavior of the material. In this tutorial, you assume that the material is isotropic linear elastic:
  1. Expand the Continua > Beam Physics > Models > Material Law Models > Material Laws node.
    Simcenter STAR-CCM+ automatically adds a material law node and assigns it to the solid material defined in the physics continuum.

  2. Rename the Material Laws > Default Material Law node to Isotropic Linear Elastic.
  3. For the Isotropic Linear Elastic law node, select the following models:
    Group box Model
    Material Stiffness Models Linear Elasticity
    Material Strain Measures Linear Strain (Small Strain) (selected automatically)
    Linear Elastic Material Models Isotropic Linear Elasticity