Hello everyone,
I am curretly working on predicting the failure in thin loaded plates. The plates are impacted by a hemispherical rigid cylinders at a low speed (4.53 m/s <--> Free fall from 1.05 meter) and are perforated experimentally at their center.
I tried to simulate failure with ls-dyna on a shell based model ( the sheet is very thin : 1 mm thickness Vs 130 x 130 mm ), but it seems that the failure strain measured on the tensile tests is underestimated ( the curves after the begining if necking are false).
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