Interface fracture prediction of multi-material hybrid structures by modified phase field models

Identification of microscale fracture models for mortar with in-situ tests

“…The first version of PFMs was formulated for brittle fracture [45; 46]. Besides the initial formulation, extensions for cohesive fracture [47; 48; 49; 50; 29], interfacial cohesive fracture [51], ductile fracture [52], mixed tensile and compressive shear fracture [53; 54; 55] and interface fracture in hybrid structures [56] were developed. The need for preexisting cracks and a priori defined paths were overcome with such models with an energy minimization approach [57] and the introduction of an auxiliary phase-field variable [58].…”

A mixed-mode dependent interface and phase-field damage model for solids with inhomogeneities

“…in [30][31][32]. Though, the original cohesive-zone concept does not take into account any internal interface variable, CZMs can be used to be combined with phase-field approaches for internal cracks according to numerous works [33][34][35][36][37], and it is interesting to unify both concepts of dealing with cracks. It requires to introduce a new degradation function which controls changing of elastic properties on the interface, considered as a thin layer of adhesive, related to the current level of damage.…”