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Analysis of stress intensity factors for three-dimensional cruciform cracks

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Abstract

The stress intensity factors for three-dimensional cruciform surface cracks in a semi-infinite body are numerically calculated by the body force method. Mindlin's point force solution is used for the derivation of basic equations to express the influence coefficient of triangular elements, into which the crack is divided. The interactions between crossed crack planes as well as contact between crack surfaces are considered in the iterative manner. Stress intensity factors for a cruciform median crack and a cruciform semicircular crack under a point force on the surface of a semi-infinite solid are analyzed. The possibility of growth of a median crack toward the free surface of the semi-infinite solid is discussed. A cruciform semicircular surface crack under remote uniaxial tension, or under combined tension and compression is also analyzed. The effect of contact of crack surfaces on stress intensity factors is discussed.

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Authors and Affiliations

  1. Department of Mechanical Science and Engineering, Faculty of Engineering, Kyushu University, 6-10-1 Hakozaki, Higashi-ku, 812, Fukuoka, Japan

    Y. Murakami & C. Sakae

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  1. Y. Murakami
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  2. C. Sakae
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Murakami, Y., Sakae, C. Analysis of stress intensity factors for three-dimensional cruciform cracks. Int J Fract 66, 339–355 (1994). https://doi.org/10.1007/BF00018438

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  • DOI: https://doi.org/10.1007/BF00018438

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