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The paper considers homogenization problems for porous piezoceramic material
with partially metallized pore surfaces. It is assumed that the thickness of the metal layer at
the boundaries of the pores is infinitesimally small, and the metallization effect is entirely
described by setting the boundary conditions for equipotential surfaces. Following previous
research of the authors, here the heterogeneity of piezoceramic polarization was taken into
account. The homogenization problems were solved, using the effective moduli method, the
finite element method, and the representative volumes with random closed porosity. An
analysis of the effective moduli on porosity was carried out for homogeneous and
inhomogeneous polarization fields.
Keywords: piezoelectricity, porous piezoceramics, microstructure, metallized micropores, nonuniform polarization, effective moduli, representative volume, finite element method |
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