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RESEARCH PAPERS

Energy Versus Stress Theories for Combined Stress—A Fatigue Experiment Using a Rotating Disk

[+] Author and Article Information
W. N. Findley, E. Szczepanski

Brown University, Providence, R. I.

P. N. Mathur

Bendix Systems Division, Ann Arbor, Mich.

A. O. Temel

Robert College, Istanbul, Turkey

J. Basic Eng 83(1), 10-14 (Mar 01, 1961) (5 pages) doi:10.1115/1.3658878 History: Received January 25, 1960; Online November 04, 2011

Abstract

An experiment is described in which the strain energy at the critical location for fatigue failure is maintained constant while the stresses on a given plane of the material at the same location are caused to fluctuate. Apparatus developed to produce this condition consisted of a circular disk with a wide flanged rim which was loaded along a diameter by means of pivot-pad bearings. The disk was then rotated under a constant load to produce the desired fluctuation in stresses at the center of the disk while maintaining a constant strain energy at the center. The fact that fatigue cracks were developed in the region of constant strain energy was considered to indicate that a concept of a fluctuating strain energy as a basic theory of failure by fatigue under combined stresses is not tenable.

Copyright © 1961 by ASME
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