3D Design

3D Design

Geometrically nonlinear analysis

    • Long Song
      Subscriber

      Can a structure be divided into two parts, one part is for geometrically nonlinear analysis and another is for linear analysis at one load case in Ansys? 

    • peteroznewman
      Subscriber

       

      A structure can have some parts that have a linear elastic material, while other parts have a non-linear material such as a plastic or hyperelastic material model. Some parts can be set to have Rigid Body behavior so they are no longer Flexible.

      If the model has frictional contact, that is a nonlinear condition that requires iteration to solve, even if all the materials are linear.

       

    • Long Song
      Subscriber

      Thanks for your reply.

      Do you mean that it is impossible?  

    • peteroznewman
      Subscriber

      A geometrically nonlinear problem means the small angle assumption is voilated. Nodal locations will be updated during the solution and large rotations can occur. That must apply to all the nodes in the analysis and requires iterations to solve. I think what you ask is impossible within a single analysis.

       

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