Solid Mechanics Material Properties: Nonlinear Structural Materials Module

These material property groups for material models in solid mechanics using the Nonlinear Structural Materials Module (including their associated physical properties) can be added to models from the window.

Table 9-14: Hyperelastic and Elastoplastic Material Properties
Property Group and Property	Name/Variable	SI Unit
Elastoplastic material
Hardening function	sigmagh	Pa
Hill’s coefficients	Hillcoefficients	(m2·s4)/kg2
Initial tensile and shear yield stresses	ys	N/m2
Initial yield stress	sigmags	Pa
Isotropic tangent modulus	Et	Pa
Kinematic tangent modulus	Ek	Pa
Armstrong-Frederick
Kinematic hardening modulus	Ck	Pa
Kinematic hardening parameter	gammak	1
Chaboche
Kinematic hardening modulus	Ck0_cha	Pa
Ludwik
Strength coefficient	k_lud	Pa
Hardening exponent	n_lud	1
Swift
Reference strain	e0_swi	1
Hardening exponent	n_swi	1
Voce
Saturation flow stress	sigma_voc	Pa
Saturation exponent	beta_voc	1
Hockett-Sherby
Steady-state flow stress	sigma_hoc	Pa
Saturation coefficient	m_hoc	1
Saturation exponent	n_hoc	1
Creep
Norton
Creep rate coefficient	A_nor	1/s
Reference stress	sigRef_nor	Pa
Stress exponent	n_nor	1
Garofalo (hyperbolic sine)
Creep rate coefficient	A_gar	1/s
Reference stress	sigRef_gar	Pa
Stress exponent	n_gar	1
Nabarro-Herring
Volume diffusivity	D_nav	m2/s
Burgers vector	b_nav	m
Grain diameter	dg_nav	m
Coble
Ionic diffusivity	D_cob	m2/s
Burgers vector	b_cob	m
Grain diameter	dg_cob	m
Weertman
Diffusivity	D_wee	m2/s
Burgers vector	b_wee	m
Stress exponent	n_wee	1
Reference stress	sigRef_wee	Pa
Viscoplastic Material
Anand
Viscoplastic rate coefficient	A_ana	1/s
Activation energy	Q_ana	J/mol
Multiplier of stress	xi_ana	1
Stress sensitivity	m_ana	1
Deformation resistance saturation coefficient	s0_ana	Pa
Deformation resistance initial value	sa_init	Pa
Hardening constant	h0_ana	Pa
Hardening sensitivity	a_ana	1
Deformation resistance sensitivity	n_ana	1
Chaboche
Viscoplastic rate coefficient	A_cha	1/s
Reference stress	sigRef_cha	Pa
Stress exponent	n_cha	1
Prezyna
Viscoplastic rate coefficient	A_per	1/s
Reference stress	sigRef_per	Pa
Poroplastic material
Initial yield stress	sigmags	Pa
Shima-Oyane alpha parameter	alphaShima	1
Shima-Oyane gamma parameter	gammaShima	1
Shima-Oyane m parameter	mShima	1
Initial void volume fraction	f0	1
Critical void volume fraction	fc	1
Failure void volume fraction	ff	1
Tvergaard correction coefficient q1	q1GTN	1
Tvergaard correction coefficient q2	q2GTN	1
Tvergaard correction coefficient q3	q3GTN	1
Maximum void volume fraction	fmax	1
Nonlinear elastic material
Reference stress	sigRef	Pa
Reference strain	eRef	1
Stress exponent	n_stress	1
Reference shear strain	gammaRef	1
Strain exponent	n_strain	1
Bulk modulus in tension	Kt	Pa
Bulk modulus in compression	Kc	Pa
Ultimate deviatoric stress	q_ult	Pa
Ultimate strain	e_ult	1
Elastoplastic soil material
Cam-Clay
Swelling index	kappaSwelling	1
Compression index	lambdaComp	1
Void ratio at reference pressure	evoidref	1
Slope of critical state line	M	1
Structured Cam-Clay
Swelling index for structured clay	kappaSwellingS	1
Compression index for destructured clay	lambdaCompS	1
Void ratio at reference pressure for destructured clay	evoidrefS	1
Destructuring index for volumetric deformation	dvS	1
Destructuring index for shear deformation	dsS	1
Slope of critical state line	M	1
Additional void ratio at initial yielding	Deltaei	1
Initial structure strength	pbi	Pa
Plastic potential shape parameter	zetaS	1
Critical effective deviatoric plastic strain	epdevc	1
Barcelona Basic
Swelling index	kappaSwelling	1
Swelling index for changes in suction	kappaSwellings	1
Compression index at saturation	lambdaComp0	1
Weight parameter	wB	1
Soil stiffness parameter	mB	Pa
Plastic potential smoothing parameter	bB	1
Tension to suction ratio	kB	1
Void ratio at reference pressure and saturation	evoidref0	1
Initial yield value for suction	sy0	Pa
Hardening soil
Reference stiffness for primary loading	E50Ref	Pa
Reference stiffness for unloading and reloading	EurRef	Pa
Stress exponent	mH	1
Bulk modulus in compression	Kc	Pa
Void ratio at reference pressure	evoidref	1
Hyperelastic Materials
Arruda-Boyce
Macroscopic shear modulus	mu0	N/m2
Number of segments	Nseg	1
Blatz-Ko
Model parameters	phiBK	1
Model parameters	betaBK	1
Shear modulus	muBK	Pa
Gao
Model parameters	aG	Pa
Model parameters	nG	1
Gent
Macroscopic shear modulus	muG	Pa
Model parameters	jmG	1
Mooney-Rivlin
Model parameters	C01, C02, C03, C10, C11, C12, C20, C21, C30	Pa
Murnaghan	The Murnaghan node adds five model parameters. The model is based on strain invariants and is typically used in acoustoelasticity.
Murnaghan third-order elastic moduli	l	Pa
Murnaghan third-order elastic moduli	m	Pa
Murnaghan third-order elastic moduli	n	Pa
Lamé parameter λ	lambLame	Pa
Lamé parameter μ	muLame	Pa
Varga
Model parameters	c1VA	Pa
Model parameters	c2VA	Pa
Yeoh
Model parameters	c1YE	Pa
Model parameters	c2YE	Pa
Model parameters	c3YE	Pa