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Hyperelastic material modeling capability


Hello,
I have a question regarding hyperelastic material modeling capability in NX DESKTOP.
Does NX DESKTOP support MATHP for higher order hyperelastic material model? After
I compiled the input file with MATHP deck and submitted for solution, f06 file lists
that some entries of MATHP are not supported. Does that mean that I cannot use higher
order hyperelastic material model?
Thanks in advance for your help.
Regards,
Henrylou
2 REPLIES

Re: Hyperelastic material modeling capability


Hello Henry,
I assume that you inserted the MATHP cards by a manual edit since currently NX does
not have support hyperelastic materials. This is ok and you should still be able
to run and post process results.
I wonder what solution sequence you are using. NX Nastran only uses the MATHP for
nonlinear solutions 106 and 601. If you tried using for sol 101, then you might
get the error you are seeing.
If that is not the problem, would it be possible to post your MATHP input.
Mark



"henry" wrote:
>
>Hello,
>
>I have a question regarding hyperelastic material modeling capability in NX
>DESKTOP.
>Does NX DESKTOP support MATHP for higher order hyperelastic material model?
>After
>I compiled the input file with MATHP deck and submitted for solution, f06
>file lists
>that some entries of MATHP are not supported. Does that mean that I cannot
>use higher
>order hyperelastic material model?
>
>Thanks in advance for your help.
>
>Regards,
>
>Henrylou

Re: Hyperelastic material modeling capability


"henry" wrote:
>
>Hello,
>
>I have a question regarding hyperelastic material modeling capability in NX
>DESKTOP.
>Does NX DESKTOP support MATHP for higher order hyperelastic material model?
>After
>I compiled the input file with MATHP deck and submitted for solution, f06
>file lists
>that some entries of MATHP are not supported. Does that mean that I cannot
>use higher
>order hyperelastic material model?
>
>Thanks in advance for your help.
>
>Regards,
>
>Henrylou

Henry,
In the QRG for MATHP, Remark 1 for SOL 601/701 states:
"1. Only A10, A01, D1, A20, A11, A02, A30, A21, A12, A03, and RHO parameters are
considered for Mooney-Rivlin material model, i.e., NA¡Ü3, ND=1. TABi and TABD may
be used to obtain these parameters."
The message you are seeing in the .f06 is just a reminder of this. Hyperelastic
materials are valid for the solution subject to these restrictions.
Jim