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Material Nonlinearity

Hello Everyone,


Is there a way to setup a nonlinear elastic orthotropic material in Femap with NX Nastran?

I'm modeling an orthotropic material where E1 and E2 are both stress dependent.


Thanks for the help!

Accepted by topic author questions
‎01-25-2017 10:39 AM

Re: Material Nonlinearity

This a limitation of Nastran nonlinear materials. See the note below from the NX Nastran Basic Nonlinear Handbook:


In NX Nastran, you can perform nonlinear elastic material analyses using isotropic materials. To
define the material properties for a nonlinear elastic analysis, use the MAT1 bulk data entry in
conjunction with the MATS1 and TABLES1 entries to define the stress-dependent material properties.
On the MATS1 entry, when you’re creating a nonlinear elastic material, use field 4 to set the TYPE
option to NLELAST.






Re: Material Nonlinearity

Hi Joe,


Thank you for answering my question so quickly. I am aware of the capability of nonlinear elastic properties for isotropic materials but I was looking for the same in orthotropic materials. I suppose an approximation with an isotropic material will have to do. Thanks again for the reply.