A phase-field model for mixed-mode elastoplastic fatigue crack

One of the most common damage modes of aero-engine hot-end components is crack. Because of the complicated geometry and harsh working environment, the crack is typically in a mixed-mode and under elastoplastic conditions. The phase-field fracture method is a numerical simulation method that has recently attracted extensive attention. However, attention toward material damage and crack initiation before the crack emerges is lacking to solve the problem of elasto-plastic mixed-mode fatigue crack propagation. In this study, an enhanced phase-field fracture method addresses this issue and predicts the propagation behavior of the elastoplastic mixed -mode fatigue crack. The effect of some parameters of this model is analyzed. This achievement is a significant contribution to the safety of aircraft engines and a novel method that can be further improved to solve problems in the future.

Automated summary

One of the most common damage modes of aero-engine hot-end components is crack, which is typically in a mixed-mode and under elastoplastic conditions due to the complicated geometry and harsh working environment. The phase-field fracture method has recently attracted extensive attention as a numerical simulation method. However, attention toward material damage and crack initiation before the crack emerges is lacking in solving the problem of elasto-plastic mixed-mode fatigue crack propagation. In this study, an enhanced phase-field fracture method is used to address this issue and predict the propagation behavior of the elastoplastic mixed-mode fatigue crack. The effect of some parameters of this model is analyzed. This achievement is a significant contribution to the safety of aircraft engines and a novel method that can be further improved to solve problems in the future.