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An energy principles based model for fatigue crack growth prediction

Lookup NU author(s): Ankang Cheng, Dr Yongchang Pu

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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND).

Abstract

© 2019 Elsevier Ltd. An energy principles based model is developed for fatigue crack growth (FCG) prediction. According to the equilibrium relationship between released strain energy and irrecoverable stored energy accumulated along the length of fracture process zone (FPZ), the FCG rate is calculated through dividing the accumulated stored energy by the elementary fracture released energy in each load cycle. The elementary fracture released energy is determined from the cyclic strain energy release rate. The accumulated stored energy is obtained by integrating the crack-tip stresses within the FPZ length. Comparison between model prediction and FCG test data is made and good agreement is observed.

Publication metadata

Author(s): Cheng A, Chen N-Z, Pu Y

Publication type: Article

Publication status: Published

Journal: International Journal of Fatigue

Year: 2019

Volume: 128

Print publication date: 01/11/2019

Online publication date: 13/07/2019

Acceptance date: 12/07/2019

Date deposited: 17/09/2019

ISSN (print): 0142-1123

ISSN (electronic): 1879-3452

Publisher: Elsevier Ltd

URL: https://doi.org/10.1016/j.ijfatigue.2019.105198

DOI: 10.1016/j.ijfatigue.2019.105198

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