Hi, We have been implementing a model into ABAQUS by VUMAT. In the user subroutine I printed out all of the components of the updated stress tensor, StressNew(K,i) i is from 1 to 6. I can also use the .ODB output file to plot the stress components , like s11, s22, s33, s12. From  what I understand both StressNew tensor from VUMAT and S tensor from ODB file are Cauchy stresses. But the problem is that these two set of values don't match each other. especially for s12 and StressNew(k,4). So my question is what is s12 in the output file of ABAQUS Explicit. Is it Cauchy stress, second Piola-Kirchhoff stress or something else.Thanks,