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How to analyze energy data from drop test simulation

Question asked by Christian Blank on Feb 24, 2015
Latest reply on Mar 10, 2015 by Jared Conway

I am working on a project to figure out the energy absorption of a material. The drop test analysis is what was recommended to me and I am having some trouble interpreting the energy density strain plot. The values give both negative and positive values and there doesn't seem to be any pattern to it. I'll attach a jpg for reference.