NUMERICAL INVESTIGATION ON EFFECTIVE ELECTROMECHANICAL PROPERTIES OF UNIDIRECTIONAL PIEZOELECTRIC COMPOSITES USING DIFFERENT UNIT CELLS MODELS

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.

اترك تعليقاً

لن يتم نشر عنوان بريدك الإلكتروني.