للكاتب :
Tawakol A. A. ENAB
Production Engineering and Mechanical Design Department
Faculty of Engineering, Mansoura University, Egypt
ABSTRACT :
Different numerical unit cells models using ANSYS® finite element package are developed for
unidirectional periodic composites made of piezoelectric (PZT) fibers embedded in a soft nonpiezoelectric
matrix. These finite element models are used for prediction of the effective
electromechanical coefficients of the periodic transversely isotropic piezoelectric cylindrical fiber
composite. Special emphasis is placed on the formulation of the boundary conditions that allows the
simulation of all modes of overall deformation arising from any arbitrary combination of mechanical
and electrical loading. These numerical models providing a powerful tools for fast calculation of the
effective electromechanical properties of 1-3 piezocomposites with arbitrary geometrical inclusion
configurations. The developed models has been applied to unidirectional piezoelectric fiber
composites with periodic hexagonal arrangement of piezoelectric fibers. The effective coefficients of
elastic stiffness, piezoelectric and permittivity matrices are evaluated for different fiber volume
fractions. Then, for verification the obtained results are compared with other experimental, analytical
and numerical methods reported in the literature, which introduce good agreement with the previous
results. The presented results can be used to enhance the understanding of the macroscopic behavior of
the 1–3 piezoelectric composite structures.