A problem about user material in Radioss

TIANWANG

Hi everyone

A few days ago I received samples(start and engine files) of Mooney-Rivlin model from here and I am grateful to it. Now I am facing problems when I want to test it.

In Hypermesh I set a beam with 10*10*50, fix one end and exert displacement of 5 on the other end. Then I apply this hyperelastic material after compiling it into lib. Now the radioss log shows like this

And the results turned out that the beam didn't stretch but immediately squashed like this

Could anyone could help me to figure it out?

I will appreciate it.

Starter, Engine, hm files are attached

Material parameter:

/MAT/USER01/1
material1

RHO_I

            6E-7

NUE

            0.49

C10 = Mu_1/2 C01 = Mu_1/(-2)C10 C01

            0.01               0.005

test.hm

LECMUSER01.f.txt

LUSER01.f.txt

Please delete .txt after downloading since the webpage did not allow me to directly upload fortran file.

TIANWANG

Question solved.

It seems like that I didn't set the property well. After rearranging it, it works well.