If you are interested in things like simulation of shells that hit metal, plastic deformation, glass cracks, etc. I do not think that games will offer you much that is based on rigorous physics.
Such calculations are usually performed using finite element analysis packages such as ANSYS, NASTRAN, ABAQUS , etc. If you are a material scientist and you want more than an empirical answer, I would say that game engines will not have the fidelity you are looking for.
I downloaded the material deformation of the material that posted chaos. I am firmly in the FEA camp.
LS Dyna is another challenger you should check out. It has also been used for problems with non-linear effects.
duffymo
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