Strain rate effect on composite material (/MAT/COMPSH)

Hello everyone,

I would like to enrich the material card of a composite material with the effect of strain rate, using the parameter c, but I have the problem that both conditions of low strain rate and high strain rate are affected by this introduction. In particular, the curves of both specimens get higher.

In this particular material, the only experimental test with a significant difference between quasi static and high strain rate conditions is the tensile 45° test. For this reason I decided to introduce this effect defining the global reference strain rate and the parameter c12 (instead of the global one c).

The global reference strain rate is defined according to the strain rate of the quasi static FEM model, and I have evaluated this value with the time history request EPSD of shell elements.

Is there any other aspect I should take into account or any errors I made?

In case I can share materials to solve this issue,

Thanks in advance.