Modelling piezoelectric energy harvesters by a finite integration technique formulation for electromechanical coupled problems
2017
A detailed analysis and optimization of piezoelectric devices, which nowadays are
of widespread use in electronic applications, requires numerical analysis. Numerical models based
on the Finite Element Method (FEM) have already been proposed in literature. The Finite Integration
Technique (FIT) provides stable and consistent discretization schemes for coupled multiphysics
problems. A FIT formulation with unstructured meshes, for 2-D/3-D coupled electromechanical static
or dynamic problems, is presented. Piezoelectric bimorph cantilevers, with a realistic multilayered
geometry, can be analyzed. Comparisons with FEM show the
validity and the accuracy of the method.
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