SEDL / STP / STP668-EB / STP35835S

Evaluation of Estimation Procedures Used in J-lntegral Testing

Landes, JD
Fellow engineer, associate engineer, and senior engineer, Westinghouse Electric Corporation, Research and Development Center, Pittsburgh, Pa.

Walker, H
Fellow engineer, associate engineer, and senior engineer, Westinghouse Electric Corporation, Research and Development Center, Pittsburgh, Pa.

Clarke, GA
Fellow engineer, associate engineer, and senior engineer, Westinghouse Electric Corporation, Research and Development Center, Pittsburgh, Pa.

Pages: 22    Published: Jan 1979

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Abstract

Estimation techniques for the calculation of J have enabled the development of simpler data reduction methods for multiple specimen J-integral tests and also prompted the development of single-specimen tests. This report describes an experimental program conducted to evaluate the accuracy of these estimation techniques. Comparisons between the values of J as calculated by the energy rate definition and those calculated by the estimation techniques for compact toughness, three-point bend, and center-cracked tension specimens are made.