Physics – Condensed Matter – Materials Science
Scientific paper
2010-02-13
Physics
Condensed Matter
Materials Science
15 pages
Scientific paper
Dielectric nano-swithes made of the materials that exhibit piezoelectric and/or flexoelectric properties with significant electro-mechanical coupling are considered. In this case, a nonuniform strain field may locally break inversion symmetry and induce polarization even in nonpiezoelectrics. At reducing dimensions to the nanoscale, the flexoelectric effect demonstrates the nonlocality of the dielectric materials and plays more significant role than piezoelectric effect. The flexoelectric effect is included into consideration via additional term coupling strain gradient and polarization in the electric enthalpy density. The equations of motion of the improved Euler-Bernoulli and Timoshenko beam models, and 2-D plate theory have been obtained.
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