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RESEARCH PAPERS

A Reliability Assessment Method in Strain-Based Fatigue Life Analysis

[+] Author and Article Information
J. Zhao, J. Tang

Center for Computer-Aided Design, University of Iowa, Iowa City, IA 52242

H. C. Wu

Department of Civil and Environmental Engineering, University of Iowa, Iowa City, IA 52242

J. Pressure Vessel Technol 120(1), 99-104 (Feb 01, 1998) (6 pages) doi:10.1115/1.2841893 History: Received June 10, 1997; Revised September 10, 1997; Online February 11, 2008

Abstract

For the purpose of fatigue reliability assessment based on strain-life analysis, a family of reliability-defined ε-Nf curves, called R -ε-Nf curves, is constructed by considering the interference model of fatigue strain capacity and applied strain history. The main effort of this work is to define reliability factors which are used to modify the conventional ε-Nf curve into a family of R -ε-Nf curves. A major contribution of this paper is to define two “unique” reliability factors, one for elastic-strain-life relation and the other for plastic-strain-life relation, for a certain reliability by using an empirical ε-Nf curve.

Copyright © 1998 by The American Society of Mechanical Engineers
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