User login

Navigation

You are here

Deformation gradient change in Abaqus

Help needed!! in Abaqus

I have UMAT written to update stress and material tangent components for a user defined material model. I need stretch ratio as an input for my material model. For this I am using deformation gradient from UMAT. Problem is, when there is constant strain (strain rate = 0), for example when material stretched to 100% strain (rubber) and then held at that strain for certain time to see stress relaxation, the deformation gradient should give the same value of 100% strain, but to my surprise this is changing. Can any one help me with this.   

 

Subscribe to Comments for "Deformation gradient change in Abaqus"

Recent comments

More comments

Syndicate

Subscribe to Syndicate