# Solid Mechanics Application Yield Criteria

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 Revision as of 17:35, 23 March 2016 (view source)Cpuigbo (Talk | contribs) (Created page with "== Definition of the class == The yield criterion defines the elastic region, the yield surface (where the plasticity occurs) and the impossible region for the stress state func...") Revision as of 17:36, 23 March 2016 (view source)Cpuigbo (Talk | contribs) Newer edit → Line 29: Line 29: {| class="wikitable" width="100%" style="text-align:left; background:#d0d9dd; border:0px solid #e1eaee; font-size:100%; -moz-border-radius-topleft:0px; -moz-border-radius-bottomleft:0px; padding:0px 0px 0px 0px;" valign="top" {| class="wikitable" width="100%" style="text-align:left; background:#d0d9dd; border:0px solid #e1eaee; font-size:100%; -moz-border-radius-topleft:0px; -moz-border-radius-bottomleft:0px; padding:0px 0px 0px 0px;" valign="top" − !Strategy + !Yield Criteria |-style="background:#F1FAFF;" |-style="background:#F1FAFF;" | MisesHuberYieldCriterion(...) | MisesHuberYieldCriterion(...)

## Definition of the class

The yield criterion defines the elastic region, the yield surface (where the plasticity occurs) and the impossible region for the stress state function.

The yield criterion needs to know the hardening law considered, which is passed in the constructor.

The yield criterion class main methods are:

Used commonly in the Flow rule:

• CalculateYieldCondition(...)
• CalculateStateFunction(...)
• CalculateDeltaStateFunction(...)

Used to compute the energy dissipation:

• CalculatePlasticDissipation(...)
• CalculateDeltaPlasticDissipation(...)

Used when IMPLEX is active:

• CalculateImplexPlasticDissipation(...)
• CalculateImplexDeltaPlasticDissipation(...)

## List of yield criteria

Yield Criteria
MisesHuberYieldCriterion(...)
SimoJuYieldCriterion(...)