Please login to view abstract download link
Phase field fracture (PFF) modeling has gained prominence in recent years due to its distinct advantages, enabling both the simulation of crack initiation and propagation without requiring additional model or criteria. This capability facilitates the modeling of diverse fracture phenomena [1] in a unified framework. Several variations of PFF for ductile fracture have been proposed in the literature [2]. In this study, a PFF model incorporating a plastic threshold is developed for ductile failure and implemented in the commercial finite element software Abaqus via user subroutines. By integrating an element deletion technique, the model captures discrete crack formation: elements exceeding a critical phase field parameter value are designated as failed and removed. This approach yields a non-local ductile fracture model capable of representing discrete cracks while mitigating issues related to element distortion during crack propagation. The model’s performance is evaluated through a series of ductile failure simulations under varying stress triaxiality and Lode parameter conditions. Additionally, complex crack propagation paths are simulated and validated against experimental data, demonstrating the model’s accuracy and versatility.