Massive Negative Contact Energy + Element Unstability?
Alright guys, this issue has been plaguing me for a long time now. This issue re-appears randomly under certain conditions, I think it is related to penetrator diameter vs armor laminate thickness.
As you can see, our energy becomes insanely negative for contact energy and then everything loses control from there. The elements of the laminate deteriorate and erode themselves far away from the impact area.
The laminate ELFORM = 2, Hourglass ID 2 and 6 were tried, same issue, Element size at center is ~0.0001m, material is a UHMWPE using MAT_003 and *CONTACT_AUTOMATIC_SURFACE_TO_SURFACE_TIEBREAK as the epoxy between the 1mm layers.
The strangest thing is, everything works on most models and I have calibrated the numerical model of it. Yet something is going wrong, and I am not sure what.
Anyone ever see this before?