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A platform for research: civil engineering, architecture and urbanism
Transient Analysis of Smart Structures Using a Coupled Piezoelectric-Mechanical Theory
Abstract Analysis of smart structures using piezoelectric materials (PZT) as either sensors or actuators has traditionally been performed using uncoupled models [1,2]. Uncoupled models make the assumption that the electric field within the piezoelectric material is constant and proportional to the ratio of electrode voltage to PZT thickness. Having made this assumption, the strain induced by an actuator is modeled with a single uncoupled equation and the charge output of a sensor is described by another uncoupled equation. This method is relatively simple, but it has its limitations. The mechanical and electric response of a piezoelectric device is in reality described by a pair of coupled equations [3] and cannot be accurately modeled if treated independently. It is necessary to simultaneously solve for both the electric response as well as the mechanical response regardless of whether the PZT is being used as a sensor or actuator. Also, the uncoupled model is not capable of taking into consideration any electrical circuitry connected to the piezoelectric device. This has been recognized in some specific applications and coupled equations have been used to model passive damping circuits [4,5] and develop self-sensing actuators [6]. Only recently have the coupled equations been simultaneously used for general analysis of adaptive structures [7–9].
Transient Analysis of Smart Structures Using a Coupled Piezoelectric-Mechanical Theory
Abstract Analysis of smart structures using piezoelectric materials (PZT) as either sensors or actuators has traditionally been performed using uncoupled models [1,2]. Uncoupled models make the assumption that the electric field within the piezoelectric material is constant and proportional to the ratio of electrode voltage to PZT thickness. Having made this assumption, the strain induced by an actuator is modeled with a single uncoupled equation and the charge output of a sensor is described by another uncoupled equation. This method is relatively simple, but it has its limitations. The mechanical and electric response of a piezoelectric device is in reality described by a pair of coupled equations [3] and cannot be accurately modeled if treated independently. It is necessary to simultaneously solve for both the electric response as well as the mechanical response regardless of whether the PZT is being used as a sensor or actuator. Also, the uncoupled model is not capable of taking into consideration any electrical circuitry connected to the piezoelectric device. This has been recognized in some specific applications and coupled equations have been used to model passive damping circuits [4,5] and develop self-sensing actuators [6]. Only recently have the coupled equations been simultaneously used for general analysis of adaptive structures [7–9].
Transient Analysis of Smart Structures Using a Coupled Piezoelectric-Mechanical Theory
Chattopadhyay, Aditi (author) / Thornburgh, Robert P. (author) / Ghoshal, Anindya (author)
2003-01-01
10 pages
Article/Chapter (Book)
Electronic Resource
English
Piezoelectric Material , Transverse Shear , Piezoelectric Actuator , Electric Displacement , Transient Analysis Engineering , Mechanical Engineering , Materials Science, general , Artificial Intelligence (incl. Robotics) , Civil Engineering , Appl.Mathematics/Computational Methods of Engineering , Mechanics
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