BECAS
BELTRAMO Emmanuel
artículos
Título:
Three-dimensional formulation of a strain-based geometrically nonlinear piezoelectric beam for energy harvesting
Autor/es:
BELTRAMO, EMMANUEL; BALAKUMAR, BALACHANDRAN; PREIDIKMAN, SERGIO
Revista:
JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES
Editorial:
SAGE PUBLICATIONS LTD
Referencias:
Lugar: London; Año: 2021
ISSN:
1045-389X
Resumen:
In this paper, the authors introduce a model of a strain-based geometrically nonlinear piezoelectric beam for modelingenergy harvesters. A nonlinear shear-underfomable 3-D Rayleigh?s beam theory is used to model the displacement fieldsand can be considered as an interesting alternative to linear and highly nonlinear models commonly presented in the literature.The nonlinearities are introduced to reproduce the behavior of the flexible structure, since moderate to largedisplacements can occur in response of external loading conditions. The finite element method is used to model thepiezolaminated bimorph configuration. Each finite element consists of two piezoelectric energy harvesters embedded orperfectly bonded to an elastic substrate. The electromechanical coupling includes axial and flexural effects as well asadditional term that comes from the nonlinearity incorporated into the strain tensor. Additionally, the authors explorebriefly two topics for linear harvesters: the influence of the electric domain on the structural properties and, the performanceof the harvester near resonance in term of electric power output of a purely resistive network. As a validationcase, a cantilevered piezoelectric energy harvester under base excitation is modeled. Alongside, the response to gust ofa harvester embedded in a wing structure is analyzed.