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Spatially resolved piezo-spectroscopic characterizations for the validation of theoretical models of notch-root stress fields in ceramic materials

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Abstract

The main aim of this work is a precise experimental assessment of the local stress fields developed at the notch-root in a ruby crystal, selected as a paradigm brittle material, by means of photo- and electron-stimulated luminescence techniques. Our approach takes advantage of the piezo-spectroscopic (PS) effect, which consists of a spectral shift of the luminescence emitted by the material due to lattice strain. Highly spatially resolved stress maps were extensively collected at the notch-root and spectral shifts monitored for the chromophoric (R-lines) fluorescence observed in a single-crystalline ruby sample. Experimental data were analyzed and compared to the theoretical solutions of notch-root stress fields given by Filippi and by Creager-Paris. Due to its inherent simplifications, the Creager–Paris solution was found leading to underestimation of the maximum stress value piled up in the material, while the Filippi’s solution represented a more suitable approximation for the stress field developed at the notch-root.

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Authors and Affiliations

  1. Ceramic Physics Laboratory, Kyoto Institute of Technology, Sakyo-ku, Matsugasaki, Kyoto, 606-8585, Japan

    Maria Chiara Munisso, Satomi Yano, Wenliang Zhu & Giuseppe Pezzotti

  2. Research Institute for Nanoscience, RIN, Kyoto Institute of Technology, Sakyo-ku, Matsugasaki, Kyoto, 606-8585, Japan

    Maria Chiara Munisso & Giuseppe Pezzotti

Authors
  1. Maria Chiara Munisso
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  2. Satomi Yano
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  3. Wenliang Zhu
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  4. Giuseppe Pezzotti
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Correspondence to Giuseppe Pezzotti.

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Communicated by W. H. Müller

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Munisso, M.C., Yano, S., Zhu, W. et al. Spatially resolved piezo-spectroscopic characterizations for the validation of theoretical models of notch-root stress fields in ceramic materials. Continuum Mech. Thermodyn. 20, 123–132 (2008). https://doi.org/10.1007/s00161-008-0074-0

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