# Mullins effect

 The Mullins effect model: is intended for modeling stress softening of filled rubber elastomers under quasi-static cyclic loading, a phenomenon referred to in the literature as Mullins effect; provides an extension to the well-known isotropic hyperelastic models; is based on the theory of incompressible isotropic elasticity modified by the addition of a single variable, referred to as the damage variable; assumes that only the deviatoric part of the material response is associated with damage; is intended for modeling material response in situations where different parts of the model undergo different levels of damage resulting in a different material response; is applied to the long-term modulus when combined with viscoelasticity; and cannot be used with hysteresis. Abaqus provides a similar capability that can be applied to elastomeric foams (see Energy dissipation in elastomeric foams). The following topics are discussed:
 Related Topics About the material library Combining material behaviors Elastic behavior Hyperelastic behavior of rubberlike materials Anisotropic hyperelastic behavior Permanent set in rubberlike materials Energy dissipation in elastomeric foams In Other Guides *HYPERELASTIC *MULLINS EFFECT *PLASTIC *UNIAXIAL TEST DATA *BIAXIAL TEST DATA *PLANAR TEST DATA Mullins effect

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