Effects of Particle Shape and Microstructure on Effective
Nonlinear Response |
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Authors: | HUANG Ji-Ping and LI Zhen-Ya |
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Institution: | Department of Physics, Suzhou University, Suzhou 215006, China |
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Abstract: | We consider a binary granular composite medium, in which two materials
have high-order nonlinearities. The effect of particle shape on effective
nonlinear response (ENR) is investigated by assuming all the particles to be shaped as uniaxial ellipsoid. We discuss two types of arrangements of particles: 1) parallel axes (Case I); 2) random axes (Case II).
During the process of numerical calculation, one component material
is assumed to be linear, and two kinds of conductors are assumed to be at
high conducting contrast. We find that: 1) the shape effect on ENR is possibly
strong; 2) the enhanced ENR can even be obtained by choosing particles
of appropriate ellipsoidal shapes; 3) the ENR enhancement predicted by
Case I is much stronger than that by Case II. |
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Keywords: | effective nonlinear response particle shape microstructure |
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