uanisohyper_inv and uhyper

[IceBreakerSours]

I want to add stretch dependency to the Neo Hookean strain energy density potential (implemented in UHYPER). Is it possible to "export" the stretch (square root of I4) from UANISOHYPER_INV to UHYPER? How?

http://www.eng-tips.com/faqs.cfm?fid=376

http://www.eng-tips.com/faqs.cfm?fid=1083

 

[MechIrl]

Would it not be easier to implement the neo-hookian model in the UANISOHYPER_INV routine? I think you might have problems getting Abaqus to call both UHYPER and UANISOHYPER_INV for the same integration point, unless you overlay elements or something.

 

[IceBreakerSours]

..implement the neo-hookian model in the UANISOHYPER_INV routine?

Yes, MechIrl. I thought of it right after posting the question and am implementing it as we 'speak'.

Thank you.

http://www.eng-tips.com/faqs.cfm?fid=376

http://www.eng-tips.com/faqs.cfm?fid=1083