Fracture failure of quasi-brittle materials by a novel peridynamic model

A Peridynamic (PD) model is proposed for the fracture failure simulation of single-phase and composite materials with a quasi-brittle behaviour under Mixed-Mode loading. More precisely, the novelty of the proposed model consists in taking into account the dissipated energy related to both the damage produced by material degradation and the damage produced by frictional sliding along rough crack surfaces. More precisely, the frictional sliding is taken into account within the model by a novel bond force-stretch relationship, where the rupture stretch related to a generic bond under tension is made depend on the level of compression of the adjacent bonds. Such a PD model is employed to simulate some experimental tests available in the literature.

Automated summary

This study proposes a Peridynamic (PD) model for simulating fracture failure of single-phase and composite materials with quasi-brittle behavior under Mixed-Mode loading. The novelty of the model lies in considering the dissipated energy from both material degradation-induced damage and frictional sliding-induced damage along rough crack surfaces. Specifically, the model incorporates frictional sliding through a novel bond force-stretch relationship, in which the rupture stretch caused by tension on a generic bond depends on the compression level of adjacent bonds. The PD model is applied to simulate some experimental tests available in the literature.