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Modelling short crack propagation in a single crystal nickel-based superalloy using crystal plasticity and XFEM

journal contribution
posted on 12.03.2020 by Ping Zhang, Lu Zhang, Konstantinos 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 [111] 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.

Funding

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

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

International Journal of Fatigue

Volume

136

Issue

July 2020

Publisher

Elsevier

Version

AM (Accepted Manuscript)

Rights holder

© Elsevier Ltd

Publisher statement

This paper was accepted for publication in the journal International Journal of Fatigue and the definitive published version is available at https://doi.org/10.1016/j.ijfatigue.2020.105594.

Acceptance date

11/03/2020

Publication date

2020-03-12

Copyright date

2020

ISSN

0142-1123

Language

en

Depositor

Prof Liguo Zhao Deposit date: 11 March 2020

Article number

105594

Exports