Fatigue Life Estimating Method for Multiple-Site Structure

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Fatigue crack initial life of multiple-site structure is described as the shortest life of all site’s fatigue initial lives. This paper will establish a method, which is described to estimate fatigue initial life of multiple-site structure. Using finite element method (FEM), the local stress concentration of each site is calculated. Using the statistical fatigue theory, the fatigue crack initial probability can be considered. Numerical example indicates: fatigue crack initial life of multiple-site structure is shorter then the life of single site. At the end of paper, experiment was executed adopting the same fatigue cycle loads with the computational case. The receivable relative error between the experimental result and the result of numerical analysis verifies the efficiency of this method.Introduction

Info:

Periodical:

Key Engineering Materials (Volumes 324-325)

Edited by:

M.H. Aliabadi, Qingfen Li, Li Li and F.-G. Buchholz

Pages:

811-814

DOI:

10.4028/www.scientific.net/KEM.324-325.811

Citation:

L. P. Long and J. Y. Zhang, "Fatigue Life Estimating Method for Multiple-Site Structure", Key Engineering Materials, Vols. 324-325, pp. 811-814, 2006

Online since:

November 2006

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Price:

$35.00

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[5] P. Shi and S. Mahadevan: Int. J. of Fatigue, Vol. 25 (2003), pp.457-469.

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