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Inhomogeneous Strain/Stress Profiles in the Nacre Layer of Mollusk Shells

  • Symposium: Structural Transitions and Local Deformation Processes at and near Grain Boundaries
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Abstract

Internal strain/stresses in the nacre layer of mollusk shells are measured as a function of depth under controlled etching in selected areas. We found strain release to be enhanced when approaching the inner surface of the shell adjacent to the mollusk mantle. Strain distribution across the thickness of the shell consists of two components: a slowly changing component, which reflects elastic bending of the shell; and a short-range periodic modulation due to forces acting at interfaces between ceramic lamella. Simulations based on the multilayer structure model reproduce well the main features of the obtained experimental data.

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Acknowledgments

This research was supported by the Technion V.P. Research Fund and the Shore Research Fund in Advanced Composites. One of the authors (EZ) is the incumbent of the Abraham Tulin Academic Chair at the Technion. BP is a Horev Fellow in the framework of the Program “Leaders in Science and Technology” at the Technion.

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Authors and Affiliations

  1. Department of Materials Engineering, Technion-Israel Institute of Technology, Haifa, 32000, Israel

    B. Pokroy (Doctor), V. Demensky (Student) & E. Zolotoyabko (Professor)

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  1. B. Pokroy
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  2. V. Demensky
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  3. E. Zolotoyabko
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Corresponding author

Correspondence to E. Zolotoyabko.

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Manuscript submitted December 6, 2009.

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Pokroy, B., Demensky, V. & Zolotoyabko, E. Inhomogeneous Strain/Stress Profiles in the Nacre Layer of Mollusk Shells. Metall Mater Trans A 42, 554–558 (2011). https://doi.org/10.1007/s11661-010-0203-9

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  • DOI: https://doi.org/10.1007/s11661-010-0203-9

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