I am experimenting with different damage models to determine which one is best for my PhD simulations. The two models I have my eyes on are: GTN and Shear Damage models. I want to include the combined effect of voids nucleation and shear bands localization on the mechanical performance.
I saw papers using VUMAT subroutine. However, I feel that writing a subroutine is complicated since it is not within my area of expertise.
What do you suggest?