No problem Min-Chun.
While you investigate the model, it is worth checking that the generated set includes all the nodes at the one end of the specimen. Also, try applying a velocity (instead of displacement) boundary condition by changing VAD from 2 to zero in the *BOUNDARY_PRESCRIBED_MOTION_SET card and providing a velocity curve to the model. I usually get better luck with velocity BCs for tensile test simulations.
You are navigating away from the AIS Discovery experience