Fatigue Gage Utilizing Surface Roughening of Aluminum Foil

[+] Author and Article Information
Y. Nagase, Y. Sawaki, H. Yoshida

Department of Mechanical Engineering, Shizuoka University, 3-5-1 Johoku, Hamamatu 432, Japan

F. Moritake

Star Seimitu Co. Ltd., 194 Nakayoshida, Shizuoka 422, Japan

J. Eng. Mater. Technol 117(1), 56-61 (Jan 01, 1995) (6 pages) doi:10.1115/1.2804372 History: Received June 30, 1992; Online November 27, 2007


The surface roughening phenomenon of an aluminum foil is utilized as the measure of stress measurements under variable amplitude stressing and fundamental characteristics of the evolution of the roughness are investigated. The effect of load history on the surface roughening does not appear when the stress amplitude varies many times. Under such a loading condition, the average stress amplitude is measured from the surface roughness of the foil, and this is defined by (∑σiαNi/∑Ni)1/α, where σi , Ni and α are the stress amplitude, the number of stress cycles of σi , and the material factor, respectively.

Copyright © 1995 by The American Society of Mechanical Engineers
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