Hi
I'm trying to model the dynamic response of a foam submitted to an impact.
The behavior of the foam depends of the strain rate, law 35 seems dedicated to such behavior.
In the Radioss theory manual, the expression of dP/dt is specified. First, does that represent the variation of the pressure versus the time?
If I set C2=C3=0, the material is no more viscoelastic but elastic, however the Young modulus still depend on the strain rate?
Lastly, how is the strain rate computed? I know it's the maximum of the strain rate tensor, but how is the tensor computed?
Thanks
Please answer