Material Models
There are many material models available for structural analysis in COMSOL Multiphysics. In this section, the theory for all material models is presented. The material models available, and also some detailed aspects of them, depend on which licenses you have. The material models, grouped by families, are as follows:
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Linear Elastic Material
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Nonlinear Elastic Materials
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Ramberg–Osgood
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Power Law
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Bilinear Elastic
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Uniaxial Data
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Shear Data
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Hyperbolic Law
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Hardin–Drnevich
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Duncan–Chang
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Duncan–Selig
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Small Strain Overlay
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User Defined
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Linear Viscoelasticity
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The Maxwell Model
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The Generalized Maxwell Model
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The Kelvin–Voigt Model
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The Generalized Kelvin–Voigt Model
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Standard Linear Solid Model
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The Burgers Model
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Generalized Maxwell Model with Fractional Derivatives
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Generalized Kelvin–Voigt Model with Fractional Derivatives
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Standard Linear Solid Model with Fractional Derivatives
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Burgers Model with Fractional Derivatives
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User Defined
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Hyperelastic Materials
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Neo-Hookean
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St Venant–Kirchhoff
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Mooney–Rivlin, Two Parameters
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Mooney–Rivlin, Five Parameters
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Mooney–Rivlin, Nine Parameters
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Yeoh
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Ogden
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Storakers
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Varga
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Arruda–Boyce
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Gent
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van der Waals
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Blatz–Ko
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Gao
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Murnaghan
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Delfino
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Fung
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Extended Tube
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User Defined
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Mullins Effect
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Distributed Fiber Models
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Elastoplastic Materials
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The von Mises Criterion
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The Tresca Criterion
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Orthotropic Plasticity
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Porous Plasticity
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The Shima–Oyane Criterion
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The Gurson Criterion
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The Gurson–Tvergaard–Needleman Criterion
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The Fleck–Kuhn–McMeeking Criterion
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The FKM–GTN Criterion
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Capped Drucker–Prager
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Soil Plasticity
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The Mohr–Coulomb Criterion
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The Drucker–Prager Criterion
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The Matsuoka–Nakai Criterion
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The Lade–Duncan Criterion
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Failure Criteria for Concrete and Rocks
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The Bresler–Pister Yield Criterion
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The Willam–Warnke Criterion
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The Ottosen Criterion
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The Original Hoek–Brown Criterion
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The Generalized Hoek–Brown Criterion
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Damage Models
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Coupled Damage–Plasticity
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Elastoplastic Soil Models
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The Modified Cam-Clay Soil Model
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The Modified Structured Cam-Clay Soil Model
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The Extended Barcelona Basic Soil Model
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The Hardening Soil Model
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The Hardening Soil Small Strain Model
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Creep and Viscoplasticity
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Creep
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Viscoplasticity
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Creep and Viscoplasticity for Large Strains
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Inelastic Strain Rate
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Shape Memory Alloy
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Piezoelectricity
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Magnetomechanics
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Magnetostriction and Piezomagnetism
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Electrostriction
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Ferroelectroelasticity
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Rigid Material
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Safety Factor Evaluation
You can also add a material model which you have coded yourself and made available as a binary library file using an External Stress-Strain Relation.
In the COMSOL Multiphysics Reference Manual:
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Working with External Materials
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External Material