LS-DYNA Tiebreak Surface to Surface
I need to connect the steel plate that shown attached to a solid element that sits on the top of this plate. The dimensions of the plate are 20 in x 10 in and subjected to a tension force of 100,000 Ib. I used Tiebreak Surface to Surface to provide this connection between the plate and the solid element. So, I selected the top surface of the plate as the slave segment and the bottom surface of the solid element as the master segment. The connection area is 200 in^2, so setting the shear stress failure (SFLS) less than 100,000 Ib/200 in^2 = 500 psi will cause a shear stress failure for the module. Furthermore, I don’t want my model to fail by normal stress so I neglected the normal stress failure (NFLS) by setting it to 1e+10 psi.
My question is, what did I miss? Because even if I set the SFLS to 1000 psi the model is still failing. In other words, the generated shear stress due to the 100,000 Ib tension force should not exceed 1000 psi so why it is failing?