We are attempting to use non-linear dynamic simulation tostudy the interaction of a piston hitting a bit/moil which isdriven into rock. Much like the way a paving breaker or rockdrillwould operate. So far, we have used simple springs to represent therock-bit interface. However, we know that the rock is irreversiblycrushed (like plastic deformation) with an unloading slope which is8-12X steeper than the loading slope. The springs do not adequatelysimulate this behavior.

Does anyone have a suggestion with how the behavior of rock couldbe modeled?SolidworksSimulation