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RESEARCH PAPERS

Problems in Damage Analysis Under Nonproportional Cycling

[+] Author and Article Information
B. N. Leis, J. H. Laflen

Battelle, Columbus Laboratories, Columbus, Ohio 43201

J. Eng. Mater. Technol 102(1), 127-134 (Jan 01, 1980) (8 pages) doi:10.1115/1.3224769 History: Received July 28, 1978; Online September 15, 2009

Abstract

This paper uses examples to illustrate problems in damage analysis under nonproportional cycling. Nonproportional histories examined include multiaxial loading with either fixed or rotating principal directions. Currently popular concepts advanced for use in damage analysis of nonproportional cycling are reviewed and examined in terms of their potential ability to assess damage for example histories. It is shown that while such damage measures may be valid for mildly nonproportional histories, their successful application to general nonproportional cycling is unlikely. The paper closes with a commentary on the issues considered.

Copyright © 1980 by ASME
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