Modeling & Meshing

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  3. Why does a shell model, supported at the surface, bend the wrong way when subjected to gravity?

Why does a shell model, supported at the surface, bend the wrong way when subjected to gravity?

Tagged: 11, beams-and-shells, Mechanical APDL (f. ANSYS), modeling-and-meshing, structural-mechanics
    • March 17, 2023 at 9:00 am
      FAQFAQ
      Participant

      The default SHELL181 applies inertial forces at the nodes without the associated moment. Ignoring rotational inertia could cause hour-glassing with this formulation. Setting KEYOPT(3)=2 corrects the problem. This behavior has been documented in the limitations section for SHELL181 element documentation.

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