ABSTRACT
An extension of a recently proposed cohesive zone model that combines mixed-mode fracture with regularized friction for quasi-brittle materials is presented. This interface material model is characterized by mixed-mode fracture in tension-shear, and by cohesion and Coulomb friction in compression-shear. In previous work, the discontinuity arising in the traction-separation relation due to the introduction of friction has been smoothed through a time-independent function. In this contribution, to remove the step dependence resulting from the previous formulation, a time-dependent regularization is proposed. Similarities and discrepancies between the two procedures are discussed.
