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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Nonlinear modeling of electro-aeroelastic dynamics of composite beams with piezoelectric coupling

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dos Santos, Carlos R. [1] ; Pacheco, Douglas R. Q. [2] ; Taha, Haithem E. [3] ; Zakaria, Mohamed Y. [4]
Total Authors: 4
[1] Univ Sao Paulo EESC USP, Sao Carlos Sch Engn, Sao Carlos, SP - Brazil
[2] Graz Univ Technol, Inst Appl Math, A-8010 Graz - Austria
[3] Univ Calif Irvine, Dept Mech & Aerosp, Irvine, CA 92603 - USA
[4] Mil Tech Coll, Aerosp Engn Dept, Cairo 11766 - Egypt
Total Affiliations: 4
Document type: Journal article
Source: COMPOSITE STRUCTURES; v. 255, JAN 1 2021.
Web of Science Citations: 0

Structural and aerodynamic non-linearities can lead to persistent oscillations in aeroelastic systems, which allows the conversion of mechanical energy into electric power. Flexible beams represent an example of structures that can be used as energy harvesters. This work aims to model and analyze the non-linearities induced by the flow-structure interaction of an energy harvester consisting of a laminated beam integrated with a piezoelectric sensor. The cantilevered beam and the piezoelectric lamina are modeled using a nonlinear finite element approach, while unsteady aerodynamic effects are described by a state-space model that allows for arbitrary nonlinear lift characteristics. Wind tunnel tests for a fluttering beam in a broad range of flow speeds and preset angles of incidence were used to validate the electro-aeroelastic model. The matching of experimental and computational results reveals the importance of appropriately modeling structural and aerodynamic non-linearities for reproducing the physical electro-aeroelastic behavior of the system. These findings are of practical and theoretical relevance, and are further supported by the model's complete inability to reproduce experimental results when either of the non-linearities are ``switched off{''}. (AU)

FAPESP's process: 17/09468-6 - Optimization of the energy harvesting from airfoil stall induced oscillations
Grantee:Carlos Renan dos Santos
Support type: Scholarships in Brazil - Doctorate (Direct)
FAPESP's process: 18/05247-8 - Theoretical investigation of unsteady nonlinear aerodynamics
Grantee:Carlos Renan dos Santos
Support type: Scholarships abroad - Research Internship - Doctorate (Direct)