Theory Manual Version 3.4
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Subsection 5.6.4: Reaction Kinetics and Thermodynamics Up Section 5.6: Reactive Damage Mechanics Subsubsection 5.6.5.1: Strain Energy Density

### 5.6.5 Constitutive Models

Constitutive models for the damage measure may be derived from energy-based potentials or strain measures. A summary of constitutive models currently implemented in FEBio is presented below.
Subsection 5.6.4: Reaction Kinetics and Thermodynamics Up Section 5.6: Reactive Damage Mechanics Subsubsection 5.6.5.1: Strain Energy Density