Which model to use to simulate microscale damage of epoxy and carbon fiber during impact?

Hi Jorgen,

I have been working on modeling microscale damage of CFRP upon impact. Now I want to incorporate epoxy damage and carbon fiber damage. Since this is a microscale model, which model will be appropriate for epoxy damage?

I was considering using epoxy stress strain curve to incorporate the initial deformation behavior followed by shear failure criterion. https://abaqus-docs.mit.edu/2017/English/SIMACAEMATRefMap/simamat-c-failuremodels.htm

This route has been used by one paper which as been attached here ( https://doi.org/10.1007/s00170-017-1110-7 ). However, I cannot find appropriate values to use for shear failure criterion.

Do you have any other suggestion for modeling epoxy damage under dynamic impacts. I am using Abaqus/explicit.