ISSN: 1945-7553
Page Count: 10

A Simple Test Method for the Evaluation of Tearing Modulus

Takahashi, H
Associate professor, graduate student, and professor, Tohoku University, Sendai,

Khan, MA
Associate professor, graduate student, and professor, Tohoku University, Sendai,

Suzuki, M
Associate professor, graduate student, and professor, Tohoku University, Sendai,

Abstract

Material characterization studies using the multi-specimen J resistance curve procedure have been carried out for a variety of alloy steels. These results along with the data from the literature have been used to demonstrate that the J resistance curves can be normalized to a single R curve. It is shown that J-controlled crack growth is reasonably unvarying with the size of the specimen provided the minimum size requirements to insure a J-based dominance of the crack tip region are satisfied. A relatively simple procedure is proposed to permit an assessment of a critical value of the J integral, the slope of the J integral resistance curve, and the tearing modulus from a single specimen.

Keywords:
crack propagation, alloy steels, tear strength, J integral, elastic-plastic fracture, stable crack growth, size effect

Paper ID: JTE10641J
DOI: 10.1520/JTE10641J
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