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An Integral Formulation of Two-Parameter Fatigue Crack Growth Model
Joint Authors
Wang, Zili
Wu, Jianguo
Jiang, Shan
Zhang, Wei
Source
Advances in Materials Science and Engineering
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-12, 12 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-03-13
Country of Publication
Egypt
No. of Pages
12
Abstract EN
A two-parameter fatigue crack growth algorithm in integral form is proposed, which can describe the continuous crack growth process over the time period.
In this model, the fatigue crack propagation behavior is governed by the temporal crack-tip state including the current applied load and the physical condition due to the previous load sequence.
The plasticity-induced crack closure, left by the historical loading sequence, controls the following fatigue crack growth behavior and typically leads to the interaction effects.
In the proposed method, a modified crack closure model deriving from the local plastic deformation is employed to account for this load memory effect.
In general, this model can simulate the fatigue crack growth under variable amplitude loading.
Additionally, this model is established on the physical state of crack tip in the small spatial and temporal scale, and it is used to evaluate the macroscopic crack propagation and fatigue life under irregular tension-tension loading.
A special superimposed loading case is discussed to demonstrate the advantage of the proposed model, while the traditional two-parameter approach is not proper functional.
Moreover, the typical various load spectra are also employed to validate the method.
Good agreements are observed.
American Psychological Association (APA)
Wu, Jianguo& Jiang, Shan& Zhang, Wei& Wang, Zili. 2018. An Integral Formulation of Two-Parameter Fatigue Crack Growth Model. Advances in Materials Science and Engineering،Vol. 2018, no. 2018, pp.1-12.
https://search.emarefa.net/detail/BIM-1122179
Modern Language Association (MLA)
Wu, Jianguo…[et al.]. An Integral Formulation of Two-Parameter Fatigue Crack Growth Model. Advances in Materials Science and Engineering No. 2018 (2018), pp.1-12.
https://search.emarefa.net/detail/BIM-1122179
American Medical Association (AMA)
Wu, Jianguo& Jiang, Shan& Zhang, Wei& Wang, Zili. An Integral Formulation of Two-Parameter Fatigue Crack Growth Model. Advances in Materials Science and Engineering. 2018. Vol. 2018, no. 2018, pp.1-12.
https://search.emarefa.net/detail/BIM-1122179
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1122179