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Towards a new model of crack tip stress fields

Towards a new model of crack tip stress fields

Tee, Kong-Fah ORCID: 0000-0003-3202-873X, Christopher, C.J., James, M.N. and Patterson, E.A. (2007) Towards a new model of crack tip stress fields. International Journal of Fracture, 148 (4). pp. 361-371. ISSN 0376-9429 (doi:https://doi.org/10.1007/s10704-008-9209-3)

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Abstract

This work introduces a novel mathematical model of the stresses around the tip of a fatigue crack, which considers the effects of plasticity through an analysis of their shielding effects on the applied elastic field. The ability of the model to characterize plasticity-induced effects of cyclic loading on the elastic stress fields is assessed and demonstrated using fullfield photoelasticity. The focus is on determining the form of the shielding stress components (induced by compatibility requirements at the elastic–plastic interface along the crack flank and via the crack tip plastic zone) and how they influence the crack tip elastic stress fields during a load cycle. The model is successfully applied to the analysis of a fatigue crack growing in a polycarbonate CT specimen.

Item Type: Article
Uncontrolled Keywords: crack tip stress, plasticity, crack closure, crack shielding, full field photoelasticity, mathematical modelling
Subjects: T Technology > T Technology (General)
T Technology > TA Engineering (General). Civil engineering (General)
Pre-2014 Departments: School of Engineering
School of Engineering > Department of Civil Engineering
Related URLs:
Last Modified: 14 Oct 2016 09:08
Selected for GREAT 2016: None
Selected for GREAT 2017: None
Selected for GREAT 2018: None
Selected for GREAT 2019: None
URI: http://gala.gre.ac.uk/id/eprint/2982

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