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Model for the robust mechanical behavior of nacre

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Abstract

The inelastic deformation of nacre that leads to its structural robustness has been characterized in a recent experimental study. This article develops a model for the inelastic behavior, measured in tension, along the axis of the aragonite plates. The model is based on observations for abalone nacre that the inelasticity is associated with periodic dilatation bands. These bands contain coordinated separations at the periphery of the plates. The separations open as the material strains. The response is attributed to nanoscale asperities on the surfaces of the plates. The model calculates the stresses needed to displace the plates, resisted by elastic contacts at the asperities. The results are compared with the measured stress/strain curves.

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Authors and Affiliations

  1. Department of Mechanical and Aerospace Engineering and Princeton Materials Institute, Princeton University, Princeton, 08544, New Jersey, USA

    A. G. Evans, Z. Suo, R. Z. Wang & I. A. Aksay

  2. Materials Department, University of California, Santa Barbara, 93106, California, USA

    M. Y. He

  3. Division of Engineering and Applied Science, Harvard University, Cambridge, 02138, Massachusetts, USA

    J. W. Hutchinson

Authors
  1. A. G. Evans
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  2. Z. Suo
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  3. R. Z. Wang
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  4. I. A. Aksay
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  5. M. Y. He
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  6. J. W. Hutchinson
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Evans, A.G., Suo, Z., Wang, R.Z. et al. Model for the robust mechanical behavior of nacre. Journal of Materials Research 16, 2475–2484 (2001). https://doi.org/10.1557/JMR.2001.0339

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  • DOI: https://doi.org/10.1557/JMR.2001.0339

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