STP1244: Cleavage Fracture Quantified by J and A2

    Chao, YJ
    Professor and graduate student, University of South Carolina, Columbia, SC

    Ji, W
    Professor and graduate student, University of South Carolina, Columbia, SC

    Pages: 18    Published: Jan 1995


    Abstract

    The analytical asymptotic solutions including higher order terms for stresses at a crack tip embedded in a power law elastic-plastic material are applied to the interpretation of cleavage fracture for a mild steel. It is demonstrated that fracture initiation can be determined by using two parameters J and A2 — J represents the level of loading and A2 quantifies the level of constraint. Constraint related issues such as size effect, transferability, and biaxial stress effect are investigated. The predicted results have the same trend as seen experimentally.

    Keywords:

    elastic-plastic fracture, constraint, J-integral, cleavage fracture, crack tip stress fields, J-A, 2, methodology, pressure vessels, biaxial stress, brittle-ductile transition, size effect, size requirement


    Paper ID: STP14628S

    Committee/Subcommittee: E08.08

    DOI: 10.1520/STP14628S


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