Inconsistency in Theory manual 6.0 and 6.2 - Multiplicative plasticity

Ratul Das Mechanics of Materials

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Dear Community and Moderators,

I am seeking clarification on the flow rule for finite plastic strain with multiplicative decomposition. In COMSOL 6.0 documentation, the flow rule is:

and in COMSOL 6.2 documentation, the flow rule is:

I am confused about which one COMSOL actually uses. Or are they equivalent? Any help will be useful, thank you. Please see the attached screenshots as well.

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Ratul Das


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