Why don't SHELL181 mid-surface results reflect plastic stress-strain curve? Due to
transverse shear the mid-surface equivalent stress is higher than the top or bottom surface
and the value being reported is far beyond the yield stress.
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Development explained that SHELL181 treats the transverse shear linearly. Plasticity is not considered. If transverse shear needs to be modeled with plasticity a 3d element is required. Possibly a 3d submodel could be used. It is somewhat rare in thin shells for the transverse shear to be the dominant stress. |
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