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- W2012134229 abstract "We present calculations on the deformation of two- and three-layer electret systems. The electrical field is coupled with the stress–strain equations by means of the Maxwell stress tensor. In the simulations, two-phase systems are considered, and intrinsic relative dielectric permittivity and Young's modulus of the phases are altered. The numerically calculated electro-mechanical activity is compared to an analytical expression. Simulations are performed on two- and three-layer systems. Various parameters in the model are systematically varied and their influence on the resulting piezoelectricity is estimated. In three-layer systems with bipolar charge, the piezoelectric coefficients exhibit a strong dependence on the elastic moduli of the phases. However, with mono-polar charge, there is no significant piezoelectric effect. A two-dimensional simulation illustrated that higher piezoelectric coefficients can be obtained for non-uniform surface charges and low Poisson's ratio of phases. Irregular structures considered exhibit low piezoelectric activity compared to two-layer structures." @default.
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- W2012134229 date "2005-01-01" @default.
- W2012134229 modified "2023-10-03" @default.
- W2012134229 title "Modeling electro-mechanical properties of layered electrets: application of the finite-element method" @default.
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- W2012134229 doi "https://doi.org/10.1016/j.elstat.2004.06.002" @default.
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