A Two Parameter Approach to Elastic-Plastic Fracture Mechanics

Nekkal, Abderrahmane (1991) A Two Parameter Approach to Elastic-Plastic Fracture Mechanics. MSc(R) thesis, University of Glasgow.

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Abstract

The work presented in this thesis establishes techniques for the implementation of two parameter fracture mechanics. Two parameter fracture mechanics is based on the characterisation of elastic-plastic crack tip fields by the crack tip opening displacement (C.T.O.D) or equivalently by the J-contour integral introduced by Rice (1968), and the elastic T-stress which is the non-singular term in the Williams expansion (1957). In order to establish failure criteria in the form of a C.T.O.D-T fracture locus, it was necessary to design and analyse specimens which were capable of producing a range of T-stresses. An eccentrically loaded single edge crack bar was used to produce a range of bending to tension ratios on the ligament. Linear elastic finite element analyses established the relationship between the T-stress and the applied loading. Subsequent non-linear finite element analyses established techniques for the measurement of J and hence C.T.O.D.

Item Type: Thesis (MSc(R))
Qualification Level: Masters
Keywords: Mechanical engineering, Mechanics
Date of Award: 1991
Depositing User: Enlighten Team
Unique ID: glathesis:1991-77276
Copyright: Copyright of this thesis is held by the author.
Date Deposited: 14 Jan 2020 11:53
Last Modified: 14 Jan 2020 11:53
URI: http://theses.gla.ac.uk/id/eprint/77276

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