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Proceedings Paper

Detection of the location of failure caused by fatigue loading
Author(s): Kensuke Ichinose; Kiyoshi Taniuchi; Yoshimi Kosaka; Kenji Gomi
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Paper Abstract

There is a very easy technique for detecting where the part of a structure undergoes failure due to fatigue loading; this technique if of great practical value in its employment to prevent fracture. It is well known that when yield stress is applied to a low-carbon steel plate, Lueders' lines become observable on its surface to the naked eye. It is a plausible hypothesis that the locations on the surface of the plate where the Lueders' lines appear are in a state of failure. The correlation of cyclic loading and Lueders' lines should confirm whether or not Lueders' lines reliably indicate where failure results from fatigue loading. The Ra value of the surface roughness of the specimen before and after the appearance of Lueders' lines is used to ascertain this correlation. The present paper takes up cyclic tensile loading with shoulder fillets as a concrete example of the correlation of failure and stress.

Paper Details

Date Published: 31 March 1998
PDF: 11 pages
Proc. SPIE 3396, Nondestructive Evaluation of Materials and Composites II, (31 March 1998); doi: 10.1117/12.301531
Show Author Affiliations
Kensuke Ichinose, Tokyo Denki Univ. (Japan)
Kiyoshi Taniuchi, Meiji Univ. (Japan)
Yoshimi Kosaka, Tokyo Denki Univ. (Japan)
Kenji Gomi, Tokyo Denki Univ. (Japan)


Published in SPIE Proceedings Vol. 3396:
Nondestructive Evaluation of Materials and Composites II
Steven R. Doctor; Carol A. Nove; George Y. Baaklini, Editor(s)

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