Tensile Test Validation

Hello all,

I was recently messing with the tutorials in the non linear analysis chapter and this post references to the TUTORIAL: RD-3500.

For better understanding, here is a quick resume: It is about a non linear simulation of a tensile test plate with anisentropic material property. It is modeled as PShell with a Thickness of 1.7mm. So far so good.

Now here comes the part where it gets strange. The tutorial says: You can model this tensile test with only a quarter of the elements. So I went on and did that analysis and all went well. I was asking myself at the end of the test: What if I want to model this in Solidthinking, would it not be better to run it with all the elements. So I translated the elements (duplicate, reflect) and equivilanced it. I set the boundary conditions as I would expect it to be in a tensile test machine. One end I was holding with all DOFs fixed, the other was moving with the given velocity. It looks like this in my model:

I then went on and ran the simulation: It did not break.... and that I can not explain. If it is correct to calculate my simulation with only a quarter, it should be the same if done with all the elements. I then went on and checked if my model breaks at all, and that concludes in:

Quarter: T=10s Break

Full: T=15s Break

The only thing different are the boundary conditions. But I can not see my mistake. Hope you guys know any solution for that.
I was running it all on HW11. I am getting HW12 soon but any tips on how to easily get an animated version of my result file in Solidthinking would be great. Did some experiments with it but keeps crashing on lager *.h3d files.

Have a nice weekend.

Merula