Artículos de revistas
Influence of pattern gradation on the design of piezocomposite energy harvesting devices using topology optimization
Fecha
2013-08-02Registro en:
Composite part B- Engineering, Oxford, v. 43, n. 6, Special Issue, supl. 1, Part 6, p. 2646-2654, sep., 2012
1359-8368
10.1016/j.compositesb.2012.03.023
Autor
Vatanabe, Sandro Luis
Paulino, Gláucio Hermógenes
Silva, Emilio Carlos Nelli
Institución
Resumen
Piezoelectric materials can be used to convert oscillatory mechanical energy into electrical energy. Energy harvesting devices are designed to capture the ambient energy surrounding the electronics and convert it into usable electrical energy. The design of energy harvesting devices is not obvious, requiring optimization procedures. This paper investigates the influence of pattern gradation using topology optimization on the design of piezocomposite energy harvesting devices based on bending behavior. The objective function consists of maximizing the electric power generated in a load resistor. A projection scheme is employed to compute the element densities from design variables and control the length scale of the material density. Examples of two-dimensional piezocomposite energy harvesting devices are presented and discussed using the proposed method. The numerical results illustrate that pattern gradation constraints help to increase the electric power generated in a load resistor and guides the problem toward a more stable solution. (C) 2012 Elsevier Ltd. All rights reserved.