Mr. Andreas Kourtras, thank you for your answer!
Could you please clarify a few moments?:
- Does UMAT subroutine require any special design/commands to use with SPG or I can use the same UMAT for FEM elements and SPG particles in the same model?
- How can I implement user-defined failure criteria for SPG in this case? I have special constitutive model with Failure criterion in 3D stress domain. Therefore MAT_ADD_EROSION is not suitable, right? Is it possible to implement failure criterion inside UMAT for SPG particles?
Thank you in advance!