Thank you very much, Jorgen. Let me make my question clearer: I want to calculate dstress, but I dont understand the expression (W*Sigma(t)-Sigma(t)*...

thank you, Jorgen.:)

Then you can try Intel Visual Fortran 9.x, which I am sure is compatible with Abaqus 6.8.1

Thank you, Jorgen, very much. You mean I can make use of the equation mentioned above to obtain an approximate result of time rate of change of the de...