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Crack tip shielding from a plastic 'inclusion'

Crack tip shielding from a plastic 'inclusion'

James, M.N., Christopher, C.J., Lu, Yanwei, Tee, K.F. ORCID: 0000-0003-3202-873X and Patterson, E.A. (2011) Crack tip shielding from a plastic 'inclusion'. Key Engineering Materials, 465 (1). pp. 1-8. ISSN 1662-9795 (doi:https://doi.org/10.4028/www.scientific.net/KEM.465.1)

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Abstract

This paper presents a very brief overview of the philosophy underlying a plastic inclusion approach to defining the boundary stresses imposed on the applied elastic stress or displacement field by the plastic deformation attendant on crack growth in a ductile material. It leads to two new fracture mechanics parameters, KR and KS. KR defines a retardation component arising from wake contact and the Poisson’s contraction associated with the plastic zone, whilst KS describes a compatibility-induced component arising from shear at the elastic-plastic interface. These additional components imply that KF is not directly comparable with KI, as it describes the net driving force on the crack from the applied load.

Item Type: Article
Additional Information: [1] Volume title - Materials Structure & Micromechanics of Fracture VI
Uncontrolled Keywords: t-stress, crack shielding, crack tip displacement, crack tip stress, digital image correlation (DIC), Muskhelishvili, plastic enclave
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Pre-2014 Departments: School of Engineering
School of Engineering > Department of Civil Engineering
Related URLs:
Last Modified: 14 Oct 2016 09:19
Selected for GREAT 2016: None
Selected for GREAT 2017: None
Selected for GREAT 2018: None
Selected for GREAT 2019: None
Selected for REF2021: None
URI: http://gala.gre.ac.uk/id/eprint/7559

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