Life Prediction Techniques for Variable Amplitude Multiaxial Fatigue—Part 1: Theories

[+] Author and Article Information
C. H. Wang

School of Engineering and Technology, Deakin University, Geelong, Australia

M. W. Brown

Department of Mechanical and Process Engineering, University of Sheffield, Sheffield, S1 3JD U.K.

J. Eng. Mater. Technol 118(3), 367-370 (Jul 01, 1996) (4 pages) doi:10.1115/1.2806821 History: Received October 14, 1994; Revised August 27, 1995; Online November 27, 2007


Fatigue life prediction under multiaxis random loading is an extremely complex and intractable topic; only a few methods have been proposed in the literature. In addition, experimental results under multiaxis random loading are also scarce. In part one of this two-part paper, a multiaxial non-proportional cycle counting method and fatigue damage calculation procedure are proposed, which is compared with one published damage-searching method. Both theories are based on critical plane concepts, one being an extension of the local strain approach for uniaxial variable amplitude loading and the other employing a new counting algorithm for multiaxis random loading. In principle, these two methods can be considered as bounding solutions for fatigue damage accumulation under multiaxis random loading.

Copyright © 1996 by The American Society of Mechanical Engineers
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