Thermographic Determination of Fatigue Damage

[+] Author and Article Information
J. A. Charles

Department of Mechanical Engineering, Montana State University, Bozeman, Mont.

F. J. Appl, J. E. Francis

School of Aerospace, Mechanical and Nuclear Engineering, University of Oklahoma, Norman, Okla.

J. Eng. Mater. Technol 100(2), 200-203 (Apr 01, 1978) (4 pages) doi:10.1115/1.3443472 History: Received December 30, 1976; Revised September 19, 1977; Online August 17, 2010


The energy released due to hysteresis effects in cyclically loaded materials can be used to predict where fatigue cracks are likely to initiate and to determine the stage of fatigue life. In the present study, thermography is used to monitor the surface temperature distributions on a series of double-notched, mild steel fatigue specimens cyclically loaded in bending. The results indicate that the fatigue life of the material encompasses three thermal stages, each of which is indicative of the fatigue damage the material has sustained. This information can be used to avoid in-service fatigue failures.

Copyright © 1978 by ASME
Topics: Fatigue damage
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