COMSOL 6.3 - Solid Mechanics Material Properties

Solid Mechanics Material Properties

These material property groups appear for material models in solid mechanics. Most of these properties are used by the Structural Mechanics Module. The property groups of the external material are of a special type that depends on the selected interface type and are not individually documented.

Table 9-24: Solid Mechanics Materials.
Property Group and Property	Name/Variable	SI Unit
Linear Elastic Material
Anisotropic
Elasticity matrix	D	Pa
Loss factor for elasticity matrix D	eta_D	1
Anisotropic, Voigt Notation
Elasticity matrix, Voigt notation	DV0	Pa
Loss factor for elasticity matrix D, Voigt notation	eta_DVo	1
Bulk Modulus and Shear Modulus
Bulk modulus	K	N/m2
Shear modulus	G	N/m2
Compliance
Compliance matrix	Dinv_iso (6-by-6 matrix)	1/Pa
Loss factor for compliance matrix	eta_Dinv_iso (6-by-6 matrix)	1
Compliance, Voigt notation
Compliance matrix, Voigt notation	DinvVo_iso (6-by-6 matrix)	1/Pa
Loss factor for compliance matrix, Voigt notation	eta_DinvVo_iso (6-by-6 matrix)	1
Cubic
Elasticity constant C11	c11	Pa
Elasticity constant C12	c12	Pa
Elasticity constant C44	c44	Pa
Cubic (3 Constants)
Elasticity constant matrix components, Voigt notation	{c3cub1, c3cub2, c3cub3}	Pa
Effective flexibility matrices
Extensional flexibility matrix	Da_iso (3-by-3 matrix)	s2/kg
Bending-extensional flexibility matrix	Db_iso (3-by-3 matrix)	s2/(kg·m)
Bending flexibility matrix	Dd_iso (3-by-3 matrix)	s2/(kg·m2)
Shear flexibility matrix	Das_iso (2-by-2 matrix)	s2/kg
Effective stiffness matrices
Extensional stiffness matrix	DA_iso (3-by-3 matrix)	N/m
Bending-extensional stiffness matrix	DB_iso (3-by-3 matrix)	N
Bending stiffness matrix	DD_iso (3-by-3 matrix)	N·m
Shear stiffness matrix	DAs_iso (2-by-2 matrix)	N/m
Translational inertia	I0	kg/m2
Rotational-translational inertia matrix	I1_iso (3-by-3 matrix)	kg/m
Rotational inertia matrix	I2_iso (3-by-3 matrix)	kg
Loss factor for stiffness matrix DA	eta_DA_iso (3-by-3 matrix)	1
Loss factor for stiffness matrix DB	eta_DB_iso (3-by-3 matrix)	1
Loss factor for stiffness matrix DD	eta_DD_iso (3-by-3 matrix)	1
Loss factor for stiffness matrix DAs	eta_DA_iso (2-by-2 matrix)	1
Hexagonal (5 constants)
Elasticity matrix components, Voigt notation	{c5hex1, c5hex2, c5hex3, c5hex4, c5hex5}	Pa
General stress-strain relation
Second Piola–Kirchhoff stress	S_iso (3-by-3 matrix)	N/m2
Lamé Parameters
Lamé parameter λ	lambLame	N/m2
Lamé parameter μ	muLame	N/m2
Orthorhombic (9 constants)
Elasticity matrix components, Voigt notation	{c9ort1, …, c9ort9}	Pa
Orthotropic
Young’s modulus	Evector	Pa
Poisson’s ratio	nuvector	1
Shear modulus	Gvector	N/m2
Loss factor for orthotropic Young’s modulus	eta_Evector	1
Loss factor for orthotropic shear modulus	eta_Gvector	1
Orthotropic, Voigt Notation
Shear modulus, Voigt notation	GvectorVo	N/m2
Loss factor for orthotropic shear modulus, Voigt notation	eta_GvectorVo	1
Pressure-Wave and Shear-Wave Speeds
Pressure-wave speed	cp	m/s
Shear-wave speed	cs	m/s
Tetragonal (6 constants)
Elasticity matrix components, Voigt notation	{c6tet1, …, c6tet6}	Pa
Tetragonal (7 constants)
Elasticity matrix components, Voigt notation	{c7tet1, …, c7tet7}	Pa
Trigonal (6 constants)
Elasticity matrix components, Voigt notation	{c6tri1, …, c6tri6}	Pa
Trigonal (7 constants)
Elasticity matrix components, Voigt notation	{c7tri1, …, c7tri7}	Pa
Young’s Modulus and Poisson’s Ratio
Young’s modulus	E	Pa
Poisson’s ratio	nu	1
Young’s Modulus and Shear Modulus
Young’s modulus	E	Pa
Shear modulus	G	N/m2
Linear Viscoelastic Material
Long-term shear modulus	Gv	N/m2
Bulk modulus	K	N/m2
Poroelastic Material
Biot–Willis coefficient	alphaB	1
Porosity	epsilon	1
Permeability	kappa	m2
Safety
Isotropic strength parameters
Tensile strength	sigmat	Pa
Compressive strength	sigmac	Pa
Biaxial compressive strength	sigmabc	Pa
Isotropic ultimate strains
Ultimate tensile strain	epsilont	1
Ultimate compressive strain	epsilonc	1
Transversely Isotropic
Young’s modulus	Evect	Pa
Poisson’s ratio	nuvect	Pa
Shear modulus	Gvect	Pa
orthotropic strength parameters, Voigt notation
Tensile strengths	sigmats	Pa
Compressive strengths	sigmacs	Pa
Shear strengths	sigmass	Pa
orthotropic ultimate strains, Voigt notation
Ultimate tensile strains	epsilonts	1
Ultimate compressive strains	epsiloncs	1
Ultimate shear strains	gammass	1
Anisotropic strength parameters, Voigt notation
Second rank tensor, Voigt notation	F_s	1/Pa
Fourth rank tensor, Voigt notation	F_f	m2·s4/kg2
Wire material
Elastic wire
Axial stiffness	k_A	N
Mass per reference length	F_f	kg/m

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The Structural Mechanics Module User’s Guide and Table 9-27

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The Structural Mechanics Module User’s Guide and Table 9-25

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The Fatigue Module User’s Guide and Table 9-26