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


1 Reply Last Post 2 déc. 2025, 10:57 UTC−5
Jeff Hiller COMSOL Employee

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Posted: 24 minutes ago 2 déc. 2025, 10:57 UTC−5

Hello Ratul,

There was a typo in the 6.0 documentation, which was corrected by version 6.2.

Best regards,

Jeff

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Jeff Hiller
Hello Ratul, There was a typo in the 6.0 documentation, which was corrected by version 6.2. Best regards, Jeff

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