Micromorphic elastic dielectrics: Linear model and micropolar isotropic thin layers

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• 作者：Maurizio Romeo ; ^{maurizio.romeo@unige.it}
• 关键词：Continuum theory of electroelastic solids ; Dielectric polarization ; Electrostriction
• 刊名：International Journal of Solids and Structures
• 出版年：2012
• 出版时间：15 December, 2012
• 年：2012
• 卷：49
• 期：26
• 页码：3935-3941
• 全文大小：375 K

文摘

The micromorphic continuum theory of dielectrics introduced in a previous work () is here reduced to a linear set of balance and constitutive equations modeling thermo-electromagneto-elastic solids which allow for electric dipoles and quadrupoles. Electric polarization turns out to be a linear function of macroscopic strain, microrotation and their gradients. Micropolar isotropic dielectrics are considered in particular to set up the one-dimensional problem of a dielectric layer subjected to a voltage drop. The solution accounts for ionic permeability and electrostriction. In addition, the well known anomalous behavior of the electric capacitance of thin dielectric layers arises as a consequence of electroelastic coupling.