Modelling short crack propagation in a single crystal nickel-based superalloy using crystal plasticity and XFEM
journal contributionposted on 2020-03-12, 10:58 authored by Ping Zhang, Lu Zhang, Konstantinos BaxevanakisKonstantinos Baxevanakis, Liguo Zhao, Chris Bullough
Short cracks appearing under fatigue conditions are of major concern for safety-critical components. In this paper, a computational approach based on crystal plasticity and extended finite element method is developed to predict the slip-controlled short crack growth in a single crystal nickel-based superalloy. The onset of fracture is controlled by cumulative shear strain of individual slip system and the direction of crack growth follows crystallographic slip plane. Simulations are carried out for  orientation at 24 °C and 650 °C, and the results confirm the capability of this approach in predicting the tortuous crack path and irregular propagation rate.
Oxidation Damage at a Crack Tip and its Significance in Crack Growth under Fatigue-Oxidation Conditions : EP/K026844/1
Dislocation-Microstructure Interaction at a Crack Tip - In Search of a Driving Force for Short Crack Growth : EP/M000966/1
- Mechanical, Electrical and Manufacturing Engineering