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Technical Briefs

An Empirical Formula for Stress Intensity Factors of Double Edge Half-Circular-Hole Cracks in a Rectangular Sheet in Tension

[+] Author and Article Information
Xiangqiao Yan

Research Laboratory on Composite Materials,  Harbin Institute of Technology, Harbin 150001, P.R. China

J. Pressure Vessel Technol 134(5), 054503 (Sep 10, 2012) (4 pages) doi:10.1115/1.4005936 History: Received May 02, 2011; Revised November 07, 2011; Published September 10, 2012; Online September 10, 2012

This note deals with the stress intensity factors (SIFs) for double edge half-circular-hole cracks in a rectangular sheet in tension by means of the displacement discontinuity method with crack-tip elements (a boundary element method) proposed recently by the author. Moreover, an empirical formula of the SIFs of the crack problem is presented and examined. It is found that the empirical formula is simple, yet accurate for evaluating the SIFs of the crack problem.

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Copyright © 2012 by American Society of Mechanical Engineers
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Figures

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Figure 1

Rectangular tensile sheet with symmetric edge half-circular-hole cracks

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Figure 2

Cracks emanating from a circular hole in infinite plate in tension

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Figure 3

Variation of normalized SIFs (F1 ) with a/R

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Figure 4

Rectangular tensile sheet with symmetric double edge cracks

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Figure 5

Comparison of the numerical solutions obtained by BEM with those predicted by the empirical formula 3 for R/W = 0.15

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Figure 6

Comparison of the numerical solutions obtained by BEM with those predicted by the empirical formula 3 for R/W = 0.40

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