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Acrylic material allows parts to go through each other

Question asked by Alan Thomason on Jan 15, 2015
Latest reply on Jan 19, 2015 by Jared Conway

This is just one of those things I've learned to live with, but I was wondering if there was a reason why it is possible to have two parts sharing the same space in a Motion study using a contact in which the default material is left at Acrylic (see attachment). If enough impact velocity exists, I have had the parts go through one another.  I usually then change this to Dry Steel.  Turning off the Material selection also produces the correct behavior.  Nylon seems to be somewhere in between.  This is supposed to be a rigid body analysis, an attribute of which is that the deformation of the material is ignored.  So, what gives?   (pun intended).

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