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.

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: https://theses.gla.ac.uk/id/eprint/77276