Creo Simulate > Modeling Structure and Thermal Problems > Properties > Background Information > Considerations for Using Properties
  
Considerations for Using Properties
Considerations for using properties include the following:
Using Orthotropic or Transversely Isotropic Material Properties — If you plan to use orthotropic or transversely isotropic material properties, you need to assign material orientation to your model. See About Material Orientation for more information.
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