A method to take account of inhomogeneity in mechanical component reliability calculations

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Publication date
2005
Author
Li, Jian-Ping
Thompson, Glen P.
Keyword
Inhomogeneity
Reliability
Material Strenth
Load Strength Interference Theory
Monte Carlo Simulation
Rights
Copyright © [2005] IEEE. Reprinted from IEEE Transactions on Reliability. Vol. 54, No. 1. This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of the University of Bradford's products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubs-permissions@ieee.org. By choosing to view this document, you agree to all provisions of the copyright laws protecting it.
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Abstract
This paper proposes a method by which material inhomogeneity may be taken into account in a reliability calculation. The method employs Monte-Carlo simulation; and introduces a material strength index, and a standard deviation of material strength to model the variation in the strength of a component throughout its volume. The method is compared to conventional load-strength interference theory. The results are identical for the case of homogeneous material, but reliability is shown to reduce for the same load as the component volume increases. The case of a tensile bar is used to explore the variation of reliability with component volume.
URI
http://hdl.handle.net/10454/4071
Version
Published version
Citation
Li J-P and Thompson GP (2005) A method to take account of inhomogeneity in mechanical component reliability calculations. IEEE Transactions on Reliability. 54(1): 159-168.
Link to publisher’s version
http://dx.doi.org/10.1109/TR.2004.837702
Type
Article
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