Rho 2400[kg/m^3] Density
Nu 0.25 "Poisson's ratio"
Eiref 65.488[MPa] "Reference initial stiffness for primary loading"
Eurref 90[MPa] "Reference stiffness for unloading and reloading"
e0 0.65 "Initial void ratio"
m 0.55 "Stress exponent"
rc 1.84 "Swelling to compression ratio"
c 1[kPa] Cohesion
Psi 16[deg] "Dilatation angle"
Phi 42[deg] "Angle of internal friction"
Rc 0.68027 "Ellipse aspect ratio"
p0 300[kPa] Pressure
gamma_a 2e-4 "Threshold shear strain"
gammaR gamma_a/a "Reference shear strain"
E0ref 270[MPa] "Initial Young's modulus at reference pressure"
G0ref E0ref/(2*(1+Nu)) "Initial shear modulus at reference pressure"