An anisotropic cohesive fracture model: Advantages and limitations of length-scale insensitive phase-field damage models

The goal of the current work is to explore direction-dependent damage initiation and propagation within an arbitrary anisotropic solid. In particular, we aim at developing cohesive phase-field (PF) models by extending idea introduced in Rezaei et al. (2021) for fracture energy also PF based on structural tensors. formulation used contribution motivated works Lorentz (2011), Wu Nguyen (2018) Geelen (2019). results such are shown be insensitive with respect length scale parameter isotropic case. This because they manage formulate as a function diffuse displacement jumps localized damaged zone. present paper, discuss numerical examples details finite element implementations where energy, well material strength, crack direction. Using fracture, obtained converging parameter. achieved including strength addition its energy. Utilizing formulation, one can increase mesh size which reduces computational time significantly without any severe change predicted path overall load–displacement curves. We argue that these still lack capture mode-dependent properties. Open issues possible remedies future developments finally discussed well.