Hi, I am trying to use Johnson Cook model for predicting equivalent flow stress. Just to check its validity at extremities, I input ductility as plastic strain, but I don't see it output stress close to ultimate tensile strength. I used ductility over 1 millisecond to calculate plastic strain rate. All other parameters like A, B, C, n - I am using as given in standard available literature. Is it not necessary for equivalent flow stress to match with ultimate tensile strength at plastic strain matching with ductility?
Thanks,
Geoff
Thanks,
Geoff
