Dielectric sphere surrounded by a dielectric medium placed in an electric field. and refer to the phase dielectric constants, while Yint and Yext refer to their Young modulus. This assembly is the representative cell used in the following theoretical model.
Body force along the Z-axis versus reduced distance (r/a) with and .
Electric force field map around the hard phase, calculated with .
Radial stress compound Trr(2a) acting on the representative cell with and .
Tangential stress compound Trθ(2a) acting on the representative cell with and .
Following Takayanagi et al.,15 as a very rough approximation, the composite material behaves similarly to the scheme where is the elementary cell volume fraction.
Electrostriction coefficient (Eqs. (33) and (34)) versus for .
Electrostriction coefficient (Eqs. (31a) and (32)) versus and .
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