Investigating the Effect of Crack Shape on the Interaction Behavior of Noncoplanar Surface Cracks Using Finite Element Analysis

[+] Author and Article Information
Walied A. Moussa, R. Bell, C. L. Tan

Department of Mechanical And Aerospace Engineering, Carleton University, Ottawa, Canada K1S 5B6

J. Pressure Vessel Technol 124(2), 234-238 (May 01, 2002) (5 pages) doi:10.1115/1.1427690 History: Received August 03, 2000; Revised August 31, 2001; Online May 01, 2002
Copyright © 2002 by ASME
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Two parallel identical noncoplanar semi-elliptical surface cracks in an infinite plate with a finite thickness—(a) two noncoplanar surface cracks in an infinite plate with finite thickness; (b) section view of the semi-elliptic surface crack
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The finite element model of two noncoplanar interacting surface cracks in an infinite plate
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The effect of mesh sensitivity on the calculation of the interaction factor γQ—(a) the organization of different sub-zones within the interaction zone Ω; (b) variations of γQ with s/cQ for using different number of elements at subzone M
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Comparison of the values of γQ in the current work and the corresponding values found in published literature
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Variations of γQ with aQ/cQ for different values of the relative horizontal separation distance s/cQ at the deepest point of crack Q, ϕQ=90 deg—(a) remote tension; (b) pure bending
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Variations of γQ with aQ/cQ for different values of the relative horizontal separation distance s/cQ at the outer tip of crack Q, ϕQ=0 deg—(a) remote tension; (b) pure bending
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Calculated Anm values for Eq. (6) under tension or bending loads with h/2cQ=0.3 and aQ/t=0.2
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Variations of γQ with aQ/cQ for different values of the relative horizontal separation distance s/cQ at the inner tip of crack Q, ϕQ=180 deg—(a) remote tension; (b) pure bending



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