Title

Electrothermal stress in conducting particulate composites

Authors

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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