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Ansys Learning Forum › Forums › Discuss Simulation › General Mechanical › Eqivalent plastic strain not corresponding to fomulas › Reply To: Eqivalent plastic strain not corresponding to fomulas

November 19, 2024 at 4:14 pm
Armin
Ansys Employee

Hello,

Please consider the following points:

Note that the values displayed are TRUE strains so you need to convert your engineering strain to true strain. You can also check the strain along the loading direction (major principal strain) rather than equivalent strain as the stress state deviates from uniaxial tension after some point (due to localization).

As you employ different plasticity parameters in your model, the tensile specimen localizes differently (as evident by the contour plots in your screenshots) and the strain is no longer uniform at lager strains. That explains the differences in strain magnitudes in the two cases you evaluated.