Numerical simulation of the coupling between thermal dissipation and fish-eye crack growth in very high cycle fatigue regime

摘要

In this paper, we study the temperature field associated with the propagation of a fatigue crack in a very high cycle fatigue regime during ultrasonic fatigue testing. We use a Paris\textendashHertzberg crack growth law to compute the evolution of the crack and a perfectly elastic\textendashplastic constitutive law to compute the plastic dissipation per cycle at the tip of the crack. A thermomechanical finite element model is proposed to estimate the evolution of the temperature field during the crack propagation. Numerical results obtained agree fairly well with experimental results.