A Modified Phase-Field Fracture Model for Simulation of Mixed Mode Brittle Fractures and Compressive Cracks in Porous Rock

Abstract In this work, we propose a modified phase-field model for simulating the evolution of mixed mode fractures and compressive driven in porous artificial rocks. For purpose validation, behaviour rock samples, with either single or double saw cuts, under uniaxial plane strain compression has been numerically simulated. The simulated results are compared to experimental data, both qualitatively quantitatively. It is shown that proposed able capture commonly observed propagation pattern wing cracks emergence followed by secondary stresses. Additionally, typical types complex crack patterns tests successfully reproduced, as well critical loads.