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Dynamic Design of Laminated Piezocomposites Structures (LAPS) Using Topology Optimization Method (TOM)

Grant number: 11/19979-1
Support Opportunities:Scholarships in Brazil - Doctorate
Effective date (Start): May 01, 2012
Effective date (End): March 31, 2016
Field of knowledge:Engineering - Mechanical Engineering - Mechanical Engineering Design
Principal Investigator:Emílio Carlos Nelli Silva
Grantee:Ruben Andres Salas Varela
Host Institution: Escola Politécnica (EP). Universidade de São Paulo (USP). São Paulo , SP, Brazil


Laminated piezocomposite materials are composed by layers of piezoelectric, metal and composite material (epoxy matrix with carbon or glass fiber), which have advantages over conventional piezoelectric materials, because of their superior characteristics, which cannot be achieved by any of its components isolated, for example, more flexibility and strength and less weight. Under this approach, this project aims at the development of Laminated Piezocomposite Structures (LAPS) what primarily consist of multi-layer structures, through the vibration modes and resonant frequencies design aiming at dynamic applications. Among the potential applications of these structures it can be cited motors, sonar devices and energy harvester, being of great interest the improvement of its dynamic characteristics and performance. The dynamic design of a LAPS is complex however it can be systematized by using the Topology Optimization Method (TOM). The TOM is a method based on the distribution of material in a fixed design domain with the aim of extremizing a cost function subject to constraints inherent to the problem by means of combining the optimization algorithms and the finite element method (FEM). The MOT formulation for the LAPS dynamic project aims to determine together the optimal topology of the materials for different layers, the polarization sign of the piezoelectric material and the fiber angle of the composite layer, in order to design a particular vibration mode by means of maximizing the vibration amplitude at certain points for a specified resonance frequency, or the energy conversion. The work includes design, simulation, manufacturing and characterization of prototypes. The proposed topic is introduced in the research project FAPESP No. 2011/02387-4 under the responsibility of the advisor of the candidate.

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
SALAS, RUBEN ANDRES; FERREIRA DA SILVA, ANDRE LUIS; NELLI SILVA, EMILIO CARLOS. HYIMFO: Hybrid method for optimizing fiber orientation angles in laminated piezocomposite actuators. COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING, v. 385, . (20/07557-4, 14/50279-4, 11/19979-1)
SALAS, RUBEN ANDRES; JAVIER RAMIREZ-GIL, FRANCISCO; MONTEALEGRE-RUBIO, WILFREDO; SILVA, EMILIO CARLOS NELLI; REDDY, J. N.. Optimized dynamic design of laminated piezocomposite multi-entry actuators considering fiber orientation. COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING, v. 335, p. 223-254, . (11/19979-1, 14/50279-4)
Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
VARELA, Ruben Andres Salas. Dynamic design of laminated piezocomposite structures (LAPS) using the Topological Optimization Method (TOM).. 2017. Doctoral Thesis - Universidade de São Paulo (USP). Escola Politécnica (EP/BC) São Paulo.

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