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Separation between No Penetration contact surfaces

Question asked by Chris Fernald on Jun 24, 2013
Latest reply on Jun 26, 2013 by Chris Fernald

I am running an analysis on snap feature that deflects up a ramp as load is applied.  I would expect that the tendency for the snap feature to spring back would maintain constant contact on the ramp surface.  No penetration was applied to these touching surfaces, and a plot of contact pressure shows they are touching - so I suspect that the analysis is behaving.  However, the deflected model shows the two parts are gapped, even at a deformation scale of one.  I would expect them to be touching.  Any ideas as to why they separate?