Electrothermal stress in conducting particulate composites

    Authors

    F. Q. Yang;L. N. An

    Comments

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    Abbreviated Journal Title

    J. Mater. Sci.

    Keywords

    PLASMA SINTERING/SYNTHESIS PROCESS; TEMPERATURE DISTRIBUTION; CYLINDRICAL CONDUCTOR; FUNDAMENTAL INVESTIGATIONS; ALTERNATING-CURRENT; FIELD; POWDERS; Materials Science, Multidisciplinary

    Abstract

    Electrothermal-mechanical interaction plays an important role in controlling the performance of electromechanical structures and field-assisted processes. The understanding of electrothermal-mechanical behavior of a material requires the analyses of Joule heating and thermomechanical deformation. In this study, we analyze the current-induced thermal stress in a conducting composite consisting of conducting spherical inclusions at dilute concentration. Assuming that there is no interaction among conducting inclusions, we obtain closed-form solutions of local temperature and thermal stress. The thermal stress created by Joule heating is proportional to the square of electric current density (electric field intensity) and the von-Mises stress reaches the maximum value at the interface between the spherical inclusion and the matrix. Large electric current will likely cause local delamination along the interface.

    Journal Title

    Journal of Materials Science

    Volume

    47

    Issue/Number

    17

    Publication Date

    1-1-2012

    Document Type

    Article

    Language

    English

    First Page

    6226

    Last Page

    6236

    WOS Identifier

    WOS:000305233200005

    ISSN

    0022-2461

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