PowerLawFullSeparation

Source: models/solid_mechanics/traction_separation_law/PowerLawFullSeparation.py

Mixed-mode full (failure) separation under the Alfano-Crisfield power-law criterion. Opening: \(\delta_f = (2(1+\beta^2)/(K \delta_c)) [(1/G_{Ic})^\eta + (\beta^2/G_{IIc})^\eta]^{-1/\eta}\), where \(\delta_c\) is the critical separation supplied by an upstream CamanhoDavilaCriticalSeparation. Compression: \(\delta_f = 2 G_{IIc}/S\).

Inputs

normal_separation — input · Scalar · required

Normal separation (typically the Macaulay-positive part of the normal jump; used only to determine the opening / compression branch)

Outputs

full_separation — output · Scalar · required

Full (failure) separation

Parameters

mode_mixity — parameter · Scalar · required

Mode-mixity ratio. May be wired to an upstream ModeMixity (nonlinear-capable).

critical_separation — parameter · Scalar · required

Critical (damage-onset) separation. May be wired to an upstream CamanhoDavilaCriticalSeparation (nonlinear-capable).

penalty_stiffness — parameter · Scalar · required

Penalty stiffness

mode_I_fracture_toughness — parameter · Scalar · required

Mode I critical energy release rate

mode_II_fracture_toughness — parameter · Scalar · required

Mode II critical energy release rate

shear_strength — parameter · Scalar · required

Shear strength (used in compression branch)

eta — parameter · Scalar · required

Power-law exponent