Material behaviour is implemented to subroutine umat47v. It is a vectorized subroutine for x64 bit computers. For reference see: Kõrgesaar, M., Romanoff, J., 2014. Influence of mesh size, stress triaxiality and damage induced softening on ductile fracture of large-scale shell structures. Mar. Struct. 38, 1–17. doi:10.1016/j.marstruc.2014.05.001
Körgesaar, M. (Creator), Romanoff, J. (Creator) (2 jouluk. 2015). Element size and stress state dependent failure criterion implementation to LS-DYNA. Aalto University. dyn21_UMAT_KR2015(.zip). 10.24342/fe8af9bd-98da-4c3f-b6bb-3ba3f34a2b45