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The random crack core model for predicting the longitudinal tensile strengths of unidirectional composites

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Abstract

A perfect evolvement process of random crack cores is presented and a random crack core model for predicting the longitudinal tensile strengths of unidirectional composites is built in this paper. Based on the crack propagation rules, the numerical relationship of the number of random crack cores, evolvement probability of a random crack core evolving to critical size, and failure probability of a unidirectional composite are deduced. With considering some fibers breaks simultaneously and the influenced-length of the random crack cores increasing with the number of broken fibers, evolvement probability algorithms of a random crack core are developed based on the perfect evolvement process. At last, the longitudinal tensile strengths of unidirectional composites are predicted by the random crack core model, and the result shows that the random crack core model is more accurate than the classical theoretical models.

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Authors and Affiliations

  1. College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, Jiangsu, China

    Hui Yuan, Weidong Wen, Haitao Cui & Ying Xu

Authors
  1. Hui Yuan
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  2. Weidong Wen
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  3. Haitao Cui
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  4. Ying Xu
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Correspondence to Hui Yuan.

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Yuan, H., Wen, W., Cui, H. et al. The random crack core model for predicting the longitudinal tensile strengths of unidirectional composites. J Mater Sci 44, 3026–3034 (2009). https://doi.org/10.1007/s10853-009-3399-6

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  • DOI: https://doi.org/10.1007/s10853-009-3399-6

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