Computational Analysis of Fatigue Crack Propagation at Elevated Temperature for IN718
Creep damage is an important failure factor of high-temperature alloy. The fatigue crack growth under elevated temperature of the material is investigated for life prediction. In this paper, the numerical simulation of the crack propagation in nickel-based super alloy, IN718, was presented. A modified creep damage model was employed to accumulate the creep damage under cyclic loading conditions. The numerical results exhibit a reasonable agreement in the comparison with the experimental data. The cohesive zone approach, combining with the extended finite element method, has the ability to simulate the creep-fatigue crack propagation even for more complex loading conditions and specimen geometries.
G. B. Zhang and H. Yuan, "Computational Analysis of Fatigue Crack Propagation at Elevated Temperature for IN718", Applied Mechanics and Materials, Vols. 110-116, pp. 29-32, 2012