How to model non-linear orthotropic material in Optistruct Non-Linear Solver

ronk_1976

Hi Everyone, can someone help me regarding how to model non-linear orthotropic material in the optistruct non-linear solver?

I have 2 stress strain curves. One "stiffer" curve for in-plane behaviour, and one curve at approx 1/3rd of the stiffness, for out of plane behaviour.

In Optistruct itself the Mat9Orth only allows for linear material properties. I tried multiscale designer, but I wasn't able to figure out the unit-cell that could be representative, nor the way to use the inverse characterization to come to something useful.

Anybody who can help here?

Rajashri_Saha

Orthotropic material with plasticity is not yet supported in Optistruct as well as Multiscale designer.

Isotropic material supports plasticity which can be defined in MATS1 card.

ronk_1976

Thanks for the reply. That's a real pity.

I will have to research then if it's possible when switching to Radioss.

Kind regards