Hi, 

I am running a static analysis on a structural support system (comprised of shell elements), in which I am ramping up the load with time. I have provided a non linear material curve to the shells.

The model is working fine when I am providing 40mm web thickness to the plates, but it crashes way before first yield in case I am using 30mm web thickness. 

I have tried to modify the mesh and also tried to reduce the minimum time increment but it hasn't helped. Could someone please help me in resolving this issue. 

Thanks, 

Himanshu