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Ansys Learning Forum › Forums › Discuss Simulation › General Mechanical › Convergence Issues in Hyperelastic Material – Non linear Structural Analysis › Reply To: Convergence Issues in Hyperelastic Material – Non linear Structural Analysis

July 18, 2023 at 9:02 pm
peteroznewman
Subscriber

These are linear hex elements with Full Integration and Keyop(6)=1 for mixed u-P formulation.

Note that this is a quarter model: half the thickness with a symmetry plane at the midsurface and the top half of the sheet with a symmetry plane at the center of the notch slit. The reaction force is half that of a full model due to a model having only half the thickness.

One problem with Hex elements is they can develop an Hourglass deformation mode.  The following 3 slides show it being initiated.

Here is the link to the ANSYS 2023R1 archive. https://jmp.sh/zMLYOn8J