STP803V1: Use of J-Integral Estimation Techniques to Determine Critical Fracture Toughness in Ductile Steels

    Green, G
    Group leader and research officer, Central Electricity Generating Board SW Region, Scientific Services Department, Bristol,

    Miles, L
    Group leader and research officer, Central Electricity Generating Board SW Region, Scientific Services Department, Bristol,

    Pages: 22    Published: Jan 1983


    Abstract

    The use of J-integral estimation techniques is discussed with reference to the evaluation of fracture toughness values for ductile materials. Two applications are considered, tensile plates containing elliptical surface cracks and two specimens designed to produce Mode II sliding shear.

    In all cases good agreement was obtained between critical fracture toughness values obtained using J-integral estimation techniques and those obtained in established specimen geometries or by using fractographic techniques. Caution is advised in ensuring that the specimen geometry utilized for J-integral analysis is sufficiently constrained to produce a crack-tip stress-strain field uniquely characterized by the J-integral.

    Keywords:

    ductile fracture, stable crack growth, Mode II sliding shear, J-integral, J-integral estimation techniques, elastic-plastic fracture


    Paper ID: STP37310S

    Committee/Subcommittee: E08.08

    DOI: 10.1520/STP37310S


    CrossRef ASTM International is a member of CrossRef.