SYMPOSIA PAPER Published: 01 January 1983
STP36780S

Evaluation of Blunting Line and Elastic-Plastic Fracture Toughness

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The Japan Society of Mechanical Engineers (JSME) has made an effort towards standardization of the JIc test method. The recommended procedure includes two multiple-specimen methods [obtained at the intersections of the experimentally determined J-stretched zone width (SZW) blunting line and the R-curve, and of the J-SZW blunting line and the critical stretched zone width (SZWc)] and three single-specimen methods (ultrasonic, electrical potential, and acoustic emission). Concerning the blunting line and the R-curve, many experimental data have been accumulated by the present authors in recent years.

In this paper, the evaluation method of the blunting line and of the R-curve and their application to the JIc test are discussed with special attention to a comparison between two methods recommended by JSME and the American Society for Testing and Materials.

Author Information

Kobayashi, H
Tokyo Institute of Technology, Tokyo, Japan
Nakamura, H
Tokyo Institute of Technology, Tokyo, Japan
Nakazawa, H
Tokyo Institute of Technology, Tokyo, Japan
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Developed by Committee: E08
Pages: 420–438
DOI: 10.1520/STP36780S
ISBN-EB: 978-0-8031-4870-3
ISBN-13: 978-0-8031-0726-7