A novel active structural fiber (ASF; Lin and Sodano 2008 Compos. Sci. Technol. 68 1911–8) was developed that can be embedded in a composite material in order to perform sensing and actuation, in addition to providing load bearing functionality. In order to fully understand the electroelastic properties of the material, this paper will introduce a three-dimensional micromechanics model for estimating the effective electroelastic properties of the multifunctional composites with different design parameters. The three-dimensional model is formulated by extending the double inclusion model to multiphase composites with piezoelectric constituents. The double inclusion model has been chosen for the ASF studied here because it is designed to model composites reinforced by inclusions with multilayer coatings. The accuracy of our extended double inclusion model will be evaluated through a three-dimensional finite element analysis of a representative volume element of the ASF composite. The results will demonstrate that the micromechanics model developed here can very accurately predict the electroelastic properties of the multifunctional composites.
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Lin et al. (2010) studied this question.
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