STRAIN_RATE_SPIN

Question

I try to run a crash analysis containing rubber material.

The error below occurred during the simulation.

%F-P4260601-P4LZT14_STRAIN_RATE_SPIN, , ,

Element 4432313 is deformed excessively.

The element above belongs to rubber material.

It will be appreciated if somebody helps me to find a solution

Anil.Puthiya Veetil · Accepted Answer

Hi Lagae,

There are different methods used to control the negative volume effect. You can stiffen up the material at larger strain to avoid excessive deformation. Which material model are you using? There are other methods too.

You can reduce the time step scale factor (default is 0.9) . Some times this might not be enough to prevent numerical issues.

Also you can avoid using fully integrated solid (PSOLID- ISOP) which tend to be unstable while large deformation.

Apply appropriate hourglass control (DYNA) for solid elements.. You can also model the rubber using tet elements which will prevent the negative volume completely..

Also apply damping on solid elements (appropriate value). Don't over do the damping as this could affect your result values..

Hope this is helpful. If you still having issues, let me know..

Regards

Dr. Anil Veetil

STRAIN_RATE_SPIN

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