A model for the energy harvesting performance of shear mode piezoelectric cantilever

The electrical model with the piezoelectric constitutive equations of d15 mode and the single degree of freedom model are combined to describe the energy harvesting performance of shear mode piezoelectric cantilever, and the proposed model is used to simulate the frequency dependence of the output peak voltage and power. To verify the validity, the previous experimental parameters of the shear mode piezoelectric cantilever with 0.71Pb(Mg1/3Nb2/3)O3–0.29PbTiO3 single crystal and brass shim are chosen to evaluate the energy harvesting performance as the example, and the frequency dependence of the output peak voltage and output power is in good agreement with the previous experiment. The results are also compared with the ANSYS numerical solutions, which reveal acceptable agreement. The effects of the material properties and geometrical dimensions on the energy harvesting performance are discussed to provide some useful guidelines to the design of piezoelectric energy harvesting devices.