Plasticity formulation in optistruct?

Raphael Lima

Hello,

Does anyone know how plasticity is formulated in optistruct?

Reagrds!

Adriano_Koga

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.