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Hello,
Does anyone know how plasticity is formulated in optistruct?
Reagrds!
Hi Raphael,
Is there a particular aspect that concerns you?
There are a few changes depending on if your model is running Small Displacements/Deformations or Large Displacements/Deformations. Up to around 5 to 10% you could work with small deformations. But more than that, you should consider Large Deformations theory (by using LGDISP).
Below a few slides from the OptiStruct NL training material.
4
Additionally, this is how equivalent plastic strain is calculated.
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