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

作者：Nguyen H Q; Gallimard L^*; Bathias C

来源：Fatigue and Fracture of Engineering Materials and Structures, 2013, 36(5): 450-461.

DOI：10.1111/ffe.12016

• fatigue crack growth
• finite element model
• fish-eye fracture
• plasticity
• thermomechanical analysis
• ultrasonic fatigue
• very high cycle fatigue

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 ParisHertzberg crack growth law to compute the evolution of the crack and a perfectly elasticplastic 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.

• 出版日期2013-5