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Type: Conference paper
Title: Plasticity-induced crack closure model for two collinear cracks in plates of arvitrary thickness
Author: Chang, D.
Kotooussov, A.
Citation: Proceedings: the 7th Australasian Congress on Applied Mechanics (ACAM 7), 9-12 December 2012, Adelaide: pp.1130-1139
Publisher: Engineers Australia
Publisher Place: CDROM / DVDROM
Issue Date: 2012
ISBN: 9781922107619
Conference Name: Australasian Congress on Applied Mechanics (7th : 2012 : Adelaide, S.A.)
Statement of
Donghoon Chang and Andrei Kotousov
Abstract: Fracture and fatigue assessment of structures weakened by multiple site damage, such as two or more interacting cracks, is currently a very challenging problem. The main objective of this paper is to develop a mathematical model and an approach to investigate fracture behavior of two through-the-thickness collinear cracks of equal length in a plate of arbitrary thickness under remote cycling loading. The developed mathematical model of the problem under consideration is based on the classical strip yield model and plasticity induced crack closure concept. The approach utilises the fundamental solution for an edge dislocation in a plate of finite thickness and the distributed dislocation technique to obtain an effective and accurate solution to the system of governing equations. The obtained results show a very good agreement with the previously published analytical solutions for limiting cases. In particular, the new results confirm that the crack closure behavior and the opening stress variation in the case of two collinear cracks are significantly dependent on the separation gap between two cracks as well as the plate thickness.
Keywords: Collinear cracks; crack interaction; distributed dislocation technique; multiple site damage; plastic collapse; plasticity-induced crack closure; plate thickness effect; strip yield model
Rights: Copyright status unknown
RMID: 0020125578
Published version:;dn=130806014247440;res=IELENG
Appears in Collections:Mechanical Engineering conference papers
Materials Research Group publications

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