Detection of the location of failure caused by fatigue loading

Kensuke Ichinose; Kiyoshi Taniuchi; Yoshimi Kosaka; Kenji Gomi

doi:10.1117/12.301531

31 March 1998 Detection of the location of failure caused by fatigue loading

Kensuke Ichinose, Kiyoshi Taniuchi, Yoshimi Kosaka, Kenji Gomi

Proceedings Volume 3396, Nondestructive Evaluation of Materials and Composites II; (1998) https://doi.org/10.1117/12.301531
Event: Non-Destructive Evaluation Techniques for Aging Infrastructure and Manufacturing, 1998, San Antonio, TX, United States

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.

Citation Download Citation

Kensuke Ichinose, Kiyoshi Taniuchi, Yoshimi Kosaka, and Kenji Gomi "Detection of the location of failure caused by fatigue loading", Proc. SPIE 3396, Nondestructive Evaluation of Materials and Composites II, (31 March 1998); https://doi.org/10.1117/12.301531

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