Non-local strength conditions based on generalized δc cohesive models

Abstract

Generalizations of the Leonou-Panasyuk-Dugdale δc cohesive model applicable not only for crack tips but also for any internal or boundary point is described. These models are interpreted also as non-local strength conditions and can be used for description of strength small scole effects, for stress fields with stress singularities other than the usual crack tip square root singularity (e.g. for corner points), for bodies with smooth and singular stress concentrators.