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Realistic Numerical Analysis of a Bioinspired Layered Composite with a Crack: Robust Scaling Laws and Crack Arrest

Authors

  • Yukari Hamamoto,

    1. Department of Physics, Graduate School of Humanities and Sciences, Ochanomizu University, 2-1-1, Otsuka, Bunkyo-ku, Tokyo 112-8610, Japan
    2. Structural Strength Department, Research Laboratory, IHI Corporation, 1, Shin-nakahara-cho, Yokohama-shi, Kanagawa 235-8501, Japan
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  • Ko Okumura

    Corresponding author
    1. Department of Physics, Graduate School of Humanities and Sciences, Ochanomizu University, 2-1-1, Otsuka, Bunkyo-ku, Tokyo 112-8610, Japan
    • Structural Strength Department, Research Laboratory, IHI Corporation, 1, Shin-nakahara-cho, Yokohama-shi, Kanagawa 235-8501, Japan
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  • K.O. thanks Professor Takashi Kato (the University of Tokyo) for useful comments. Y.H. thanks Dr. Ohtake, Dr. Nishido and Dr. Tsunori (IHI Corporation) for encouragements. This work is supported by a project, Fusion Materials (Area no. 2206), funded by Grant-in-Aid for Scientific Research on Innovative Areas, from MEXT, Japan.

Abstract

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Bioinspired by an extremely tough biocomposite, nacre, found inside certain seashells, we perform finite-element calculations of the layered structure in the presence of a crack. Generally, such a crack deprives materials of strength since the stress is highly concentrated at the tips of a crack as demonstrated on the right (color stands for the stress intensity). Our results for the model composite revealed that the crack-tip stress is significantly reduced, following a simple scaling law.

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