How PEMAG is calculated in ABAQUS?

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How PEMAG is calculated in ABAQUS?

nshen43
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I'm wondering how PEMAG is calculated in ABAQUS. In theory, the equivalent plastic strain can be calculated based on the deviator tensor of plastic strain. In the documentation, the calculation is based on the double-dot product of ε^pl tensor. So, what is this ε^pl tensor? Just the PE components? Thank you very much!