Hello everyone,

I am using Abaqus simulating rubber-like material with Neo-Hookean model. As shown in the figure below, the result obtained from Abaqus/CAE is different from the others. User subroutine UMAT refers to mhncdo3gsh_umat.f in Abaqus Verification Guide. Why does this happen.

Boundary Condition:    Nodes  1, 2, 3, 4         U1=U2=U3=0

Load:   Nodes  5, 6, 7, 8​​​​​​​        Cload=100N