Nonlinear Static Deformation Analysis
I'm modelling a thin part made from a hyperelastic material.
With Tet elements, it crashes when I reduce the element size or increase the displacement, so I believe that it should be modelled in shell elements.
But, with shell elements, as shown in the figure, it only runs if I change the material to Isotropic. With the Superelastic material I get:
FATAL ERROR T2027: NON-COMPATIBLE MATERIAL
I'm looking at a high strain on a material that gets a lot stiffer at high strains, so an Isotropic material is going to give unrealistic results. Any suggestions please?
Hi @roger_coxNUKZV . Welcome to the Inventor Nastran forum.
The thickness of shell elements does not change in a nonlinear analysis. (This is probably why the hyperelastic material model is not supported.)
Since the part is not that thin (10 mm thick for a 60 mm "diameter" tube) and a hyperelastic material is required, you should use a solid model for the analysis.
John
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