Modeling and Analysis of a Piezoelectric Energy Harvester with Varying Cross-Sectional Area

Table 2

Geometric and material properties of the tapered bimorph harvester.

Length of the beam [mm]	50.8	Mass density of the substructure [kg/m^3]	9000
Width of the beam at the clamped end [mm]	31.5	Mass density of the PZT [kg/m^3]	7800
Width of the beam at the free end [mm]	7.25	Tip mass [kg]	0.00164
Thickness of the substructure [mm]	0.14 (each)	Proportional constant (rad/s)	8.79
Thickness of the PZT [mm]	0.26 (each)	Proportional constant (s/rad)	6.10^−6
Young’s modulus of the substructure [GPa]	105	Piezoelectric coupling coefficient [pm/V]	−190
Young’s modulus of the PZT-5A [GPa]	66	Permittivity of free space [pF/m]	8.854