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Single and Double Edge Interface Crack Solutions for Arbitrary Forms of Material Combination

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Abstract

In this paper interfacial edge crack problems are considered by the application of the finite element method. The stress intensity factors are accurately determined from the ratio of crack-tip-stress value between the target given unknown and reference problems. The reference problem is chosen to produce the singular stress fields proportional to those of the given unknown problem. Here the original proportional method is improved through utilizing very refined meshes and post-processing technique of linear extrapolation. The results for a double-edge interface crack in a bonded strip are newly obtained and compared with those of a single-edge interface crack for different forms of combination of material. It is found that the stress intensity factors should be compared in the three different zones of relative crack lengths. Different from the case of a cracked homogeneous strip, the results for the double edge interface cracks are found to possibly be bigger than those for a single edge interface crack under the same relative crack length.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Kyushu Institute of Technology, Kyushu, Japan

    Xin Lan, Nao-Aki Noda, Yu Zhang & Kengo Michinaka

Authors
  1. Xin Lan
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  2. Nao-Aki Noda
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  3. Yu Zhang
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  4. Kengo Michinaka
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Correspondence to Xin Lan.

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Lan, X., Noda, NA., Zhang, Y. et al. Single and Double Edge Interface Crack Solutions for Arbitrary Forms of Material Combination. Acta Mech. Solida Sin. 25, 404–416 (2012). https://doi.org/10.1016/S0894-9166(12)60036-6

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  • DOI: https://doi.org/10.1016/S0894-9166(12)60036-6

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