Circular piezoelectric bimorph has been successfully used in numerous types of microdevices, such as actuators for
flowcontrol applications, transducers for acoustic applications, and in locomotion of robotic systems, energy harvesting
and active structural health monitoring applications. Recently, the concept of the functionally graded material (FGM) is
introduced to improve properties and increase lifetime by selectively grading the elastic, piezoelectric, and/or dielectric
properties along the thickness of a piezoceramic. However, even for the simple case of homogeneous circular
piezoelectric geometry, analytical treatments are severely limited. This study established an axisymmetric and
isoparametric graded element to model the functionally graded circular piezoelectric plates. All the material properties
including elastic coefficients, piezoelectric coefficients, dielectric parameters and mass density are graded in the element
and interpolated using the shape functions, which is also used to render the displacements and electric potential
distribution in the element. Both static and dynamic cases can be considered in this element. MATLAB is used to
implement the whole FEM code and gives some numerical examples to demonstrate the presented method.
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