Micromechanics of magnetostrictive composites

Jacob Aboudi*, Xiaojing Zheng, Ke Jin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

Abstract

A micromechanical analysis is offered for the prediction of the effective behavior and internal field distribution of multiphase magnetostrictive composites. The analysis is based on the homogenization technique for periodic composites. The nonlinear coupled constitutive relations of the monolithic magnetostrictive have been recently established at room and elevated temperatures and verified by comparisons with experimental results. Due to the nonlinearity of these constitutive equations, the micromechanical method is based on an incremental procedure which provides the instantaneous magneto-thermo-elastic concentrations tensors that relate the local field to the externally applied loading. In addition, the analysis provides the instantaneous effective tangent tensors as well as the macroscopic constitutive equations which govern the current global behavior of the magnetostrictive composite. The present analysis provides an efficient tool for analyzing magnetostrictive composites with continuous and arbitrary inclusion phases. Results present a parametric study of the effect of applied pre-stresses, elevated temperatures and magnetostrictive phase geometry and volume fraction on a magnetostrictive/epoxy composite response that is subjected to external magnetic field. The distributions of the induced magnetostrictions in the constituents are shown in various circumstances.

Original languageEnglish
Pages (from-to)82-99
Number of pages18
JournalInternational Journal of Engineering Science
Volume81
DOIs
StatePublished - Aug 2014

Funding

FundersFunder number
German-Israel Foundation1166-163
National Natural Science Foundation of China11202086, 11121202, 11032006

    Keywords

    • High-fidelity generalized method of cells
    • Magnetostriction
    • Magnetostrictive composites
    • Micromechanics analysis
    • Terfenol-D

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