Toughening effect analysis in problems of propagating cracks interacting with interfaces.

ZAMBRANO CARRILLO, JAVIER A.; TORO, SEBASTIAN; SANCHEZ, PABLO JAVIER; MENDEZ , CARLOS; DUDA, FERNANDO; HUESPE, ALFREDO

Rio de Janeiro

Workshop; Critical Structural Integrity Challenges for the Energy Sector: Stress Corrosion Cracking and Hydrogen Embrittlement.; 2023

Universidade Federal do Rio de Janeiro

Phase fieldmodels may handle problems with crack nucleation based onstrength or toughnesscriterion. To achieve accurate predictions, it isessential to enhancethe model with a critical stress parameter that can beassociated withthe order parameter of the phase field model. Thisapproach hasbeen assumed by several authors (Tanné,  Li, Bourdin, J.J. Marigo,and C. Maurini. Crack nucleation in variationalphase-field models of brittlefracture. J.Mech. Phys. Solids, 2018 ). Possible further development ofPFM for fracture resistance assessment (includingSCC problems). Additionalcrack nucleation issues (multiple materialfailure strength criteria) can beincorporated through new degradation functions and driving force terms. (KumarA, Bourdin B, Francfort GA, Lopez-Pamies O. Revisiting nucleation in thephase-field approach to brittle fracture. J.Mech. Phys. Solids, 2020 )