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Effect of curvature at the crack tip on the stress intensity factor for curved cracks

✍ Scribed by Nao-Aki Noda; Kazuhiro Oda

Publisher: Springer Netherlands
Year: 1993
Tongue: English
Weight: 485 KB
Volume: 64
Category: Article
ISSN: 1573-2673
DOI: 10.1007/bf00015775

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✦ Synopsis

In this paper, the numerical solution of the hypersingular integral equation using the body force method in cucved crack problems is presented. In the body force method, the stress fields induced by two kinds of standard set of force doublets are used as fundamental solutions. Then, the problem is formulated as a system of integral equations with the singularity of the form r-2. In the numerical calculation, two kinds of unknown functions are approximated by the products of the fundamental density functions and power series. The calculation shows that the present method gives rapidly converging numerical results for curved cracks under various geometrical conditions, In addition, a method of evaluation of the stress intensity factors for arbitrary shaped curved cracks is proposed using the approximate replacement to a simple straight crack.

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