Research Article
Multifrequency Piezoelectric Energy Harvester Based on Polygon-Shaped Cantilever Array
| Material properties
| Beryllium bronze
C17200 | Piezoceramic PIC255 |
| | Density [kg/m3] | 8360 | |
| | Elastic modulus [kg/mm2] | | — |
| | Poisson’s ratio | 0.34 | — |
| | Isotropic structural loss factor | 0.02 | |
| | Relative permittivity | — | In the polarization direction | | | Perpendicular to polarity | |
| | Elastic stiffness coefficient [N/m2] | — | |
| | Dielectric loss factor, [10−3] | — | |
| | Coupling factor, | — | |
| | Piezoelectric voltage coefficient, [10−3 Vm/N] | — | − |
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