power-ubiquitous

bulk f

elastic bulk modulus, K

cohesion f

cohesion, c

constant-1 f

power-law constant, A₁

constant-2 f

power-law constant, A₂

dilation f

dilation angle, ψ

exponent-1 f

power-law exponent, n₁

exponent-2 f

power-law exponent, n₂

friction f

angle of internal friction, ϕ

dip f

dip angle [degrees] of weakness plane

dip-direction f

dip direction [degrees] of weakness plane

joint-cohesion f

joint cohesion, cj

joint-dilation f

joint dilation angle, ψj. The default is 0.0.

joint-friction f

joint friction angle, ϕj

joint-tension f

joint tension limit, σtj. The default is 0.0.

normal v

normal direction of the weakness plane, (\(n_x\), \(n_y\), \(n_z\))

normal-x f

x-component of the normal direction to the weakness plane, \(n_x\)

normal-y f

y-component of the normal direction to the weakness plane, \(n_y\)

normal-z f

z-component of the normal direction to the weakness plane, \(n_z\)

poisson f

Poisson’s ratio, v

shear f

elastic shear modulus, G

stress-reference-1 f

reference stress, \(\sigma^{ref}_1\)

stress-reference-2 f

reference stress, \(\sigma^{ref}_2\)

tension f

tension limit, σt. The default is 0.0.

young f

Young’s modulus, E

flag-brittle b

[advanced] If true, the tension limit is set to 0 in the event of tensile failure. The default is false.

Notes:

• Only one of the two options is required to define the elasticity: bulk modulus K and shear modulus G, or Young’s modulus E and Poisson’s ratio v.
• Only one of the three options is required to define the orientation of the weakness plane: dip and dip-direction; a norm vector (nx, ny, nz); or three norm components: nx, ny, and nz.
• The tension cut-off is σt = min (σt, c/tanϕ).
• The creep behavior is triggered by deviatoric stress, while the volumetric behavior does not consider creep.

Footnotes

Advanced properties have default values and do not require specification for simpler applications of the model.