COMSOL 6.4 - Solid Mechanics Material Properties: Geomechanics Material Model

Solid Mechanics Material Properties: Geomechanics Material Model

These material property groups for material models in solid mechanics are used by the Geomechanics Module.

Table 9-28: Geomechanics Material property groups and Properties.
Property Group and Property	Name/Variable	SI Unit
Barcelona basic
Swelling index at saturation	kappaSwelling0	1
Swelling index for changes in suction	kappaSwellingsu	1
Compression index at saturation	lambdaComp0	1
Compression index for changes in suction	LambdaCompsu	1
Void ratio at reference pressure and saturation	evoidref0	1
Initial void ratio	evoid0b	1
Weight parameter	wb	1
Soil stiffness parameter	mb	Pa
Plastic potential smoothing parameter	bb	1
Tension to suction ratio	kb	1
Initial yield value for suction	sy0	Pa
Critical state model
Poisson’s ratio	nu	1
Shear modulus	G	Pa
Slope of critical state line	M	1
Slope of critical state line for plastic potential	Mq	1
Friction angle	internalphi	rad
Dilatation angle	psid	rad
Initial void ratio	evoid0	1
Drucker–Prager
Drucker–Prager alpha coefficient	alphaDrucker	1
Drucker–Prager k coefficient	kDrucker	Pa
Fracture parameters
Tensile fracture energy	Gft	J/m2
Compressive fracture energy	Gfc	J/m2
Hardening soil
Reference initial stiffness for primary loading	EiRef	Pa
Reference failure stiffness	E50Ref	Pa
Reference stiffness for unloading and reloading	EurRef	Pa
Small strain shear modulus	G0	Pa
Reference small strain shear modulus	G0Ref	Pa
Reference shear strain	gammaRef	1
Stress exponent	mh	1
Cohesion	c	Pa
Hoek–Brown
Hoek–Brown m parameter	mHB	1
Hoek–Brown s parameter	sHB	1
Geological strength index	GSI	1
Disturbance factor	Dfactor	1
Intact rock parameter	miHB	1
Lade–Duncan
Lade–Duncan k coefficient	kLade	1
Matsuoka–Nakai
Matsuoka–Nakai mu coefficient	muMatsuoka	1
Modified Cam-clay
Swelling index	kappaSwelling	1
Compression index	lambdaComp	1
Void ratio at reference pressure	evoidref	1
Modified structured Cam-clay
Swelling index for structured clay	kappaSwellings	1
Compression index for destructured clay	lambdaCompd	1
Void ratio at reference pressure for destructured clay	evoidrefd	1
Initial void ratio for structured clay	evoid0s	1
Destructuring index for volumetric deformation	dv	1
Destructuring index for shear deformation	ds	1
Additional void ratio at preconsolidation pressure	Deltaec0	1
Initial structure strength	pb0	Pa
Plastic potential shape parameter	zeta	1
Plastic deviatoric strain at failure	edevepf	1
Mohr–Coulomb
Cohesion	cohesion	Pa
Angle of internal friction	internalphi	rad
Ottosen
Ottosen a parameter	aOttosen	1
Ottosen b parameter	bOttosen	1
Size factor	k1Ottosen	1
Shape factor	k2Ottosen	1
Soil material
Initial strength parameter	ksoil0	Pa
Hardening function, strength	ksoilh	Pa
Friction parameter	asoil	1
Dilatancy parameter	aqsoil	1
Initial cohesion	cohesion0	Pa
Hardening function, cohesion	cohesionh	Pa
Friction angle	phis	rad
Dilatation angle	psis	rad
Yield Stress Parameters
Uniaxial tensile strength	sigmaut	Pa
Uniaxial compressive strength	sigmauc	Pa
Biaxial compressive strength	sigmabc	Pa