Multiscale mechanics to determine nanocomposite elastic properties with piezospectroscopy

    Authors

    G. Freihofer; A. Schulzgen;S. Raghavan

    Comments

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    Abbreviated Journal Title

    Acta Mater.

    Keywords

    Particulate mechanics; Piezospectroscopy; Alumina; Load transfer; COMPOSITES; SIZE; INCLUSIONS; PARTICLES; INTERFACE; BEHAVIOR; ALUMINA; STRESS; EMISSION; COATINGS; Materials Science, Multidisciplinary; Metallurgy & Metallurgical; Engineering

    Abstract

    The piezospectroscopic (PS) properties of chromium-doped alumina allow for embedded inclusion mechanics to be revisited with unique experimental setups that probe the particles' state of stress when the composite is under applied load. These experimental investigations of particle mechanics will be compared to the Eshelby theory and a derivative theory. This work discovers that simple nanoparticle load transfer theories are adequate for predicting PS properties in the low to intermediate volume fraction range ( < = 20%). By applying the multiscale mechanics to a PS response, the inverse problem was demonstrated to reveal the elastic modulus of the composite. The implications for this technique are damage monitoring through observation of reduced mechanical properties in addition to a method to assist with engineering nanomaterials. (C) 2014 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

    Journal Title

    Acta Materialia

    Volume

    81

    Publication Date

    1-1-2014

    Document Type

    Article

    Language

    English

    First Page

    211

    Last Page

    218

    WOS Identifier

    WOS:000345179800021

    ISSN

    1359-6454

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