Journal ArticleDOI
Theory of piezoelectric axisymmetric bimorph
TLDR
A theory of a piezoelectric axisymmetric bimorph is presented in this paper, where the bending moments and stretching forces produced by voltage are derived, and the results obtained by means of the described theory and numerical methods have been verified experimentally or by comparing them with results obtained analytically for a simple structure.Abstract:
A theory of a piezoelectric axisymmetric bimorph is presented in this paper. Bimorphs are often used as electroacoustic transducers, but their use is much wider. A piezoelectic bimorph consists of two or more layers which are placed asymmetrically to the middle surface of the structure. When voltage is supplied to the bimorph, a bending moment is produced which causes transversal deflections of the structure. Average elastic parameters are calculated. Equations for the calculation of bending moments and stretching forces produced by voltage are derived. When the bimorph is a shell of revolution with any shape of meridian, the derived equations can be solved by numerical methods. The finite-element method (FEM) is applied to solve this problem. The bimorph can also be used as a sensor. A theory of such a sensor is also presented. The results obtained by means of the described theory and numerical methods have been verified experimentally or by comparing them with results obtained analytically for a simple structure. It has been proved theoretically that the electric signal produced by a circular transducer clamped on the outer rim of a piezoelectric disc is equal to zero.read more
Citations
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Journal ArticleDOI
A review of micropumps
Daniel J. Laser,Juan G. Santiago +1 more
TL;DR: In this article, the authors survey progress over the past 25 years in the development of microscale devices for pumping fluids and attempt to provide both a reference for micropump researchers and a resource for those outside the field who wish to identify the best micropumps for a particular application.
Journal ArticleDOI
Analytical analysis of a circular PZT actuator for valveless micropumps
Shifeng Li,Shaochen Chen +1 more
TL;DR: In this paper, a linear strain distribution is assumed across the thickness of the passive plate of the lead zirconate titanate (PZT) actuator given that the mechanical properties such as Young's modulus and Poisson ratio of the actuator and passive plate are close.
Journal ArticleDOI
Optimization of a circular piezoelectric bimorph for a micropump driver
TL;DR: In this paper, a finite element method was used to optimize the deflection of a circular bimorph consisting of a single piezoelectric actuator, bonding material and elastic plate of finite dimensions.
Journal ArticleDOI
Analytical Electroacoustic Model of a Piezoelectric Composite Circular Plate
Suryanarayana A.N Prasad,Quentin Gallas,Stephen Horowitz,Brian Homeijer,Bhavani V. Sankar,Louis N. Cattafesta,Mark Sheplak +6 more
TL;DR: In this article, an analytical two-port, lumped-element model of a piezoelectric composite circular plate is presented, where the individual components of a unimorph transducer are modeled as lumped elements of an equivalent electrical circuit using conjugate power variables, and the transverse static deflection field as a function of pressure and voltage loading is determined to synthesize the twoport dynamic model.
Journal Article
An Analytical Model for Free Vibration Analysis of Smart Annular FGM Plates Integrated with Piezoelectric Layers
Farzad Ebrahimi,Abbas Rastgoo +1 more
TL;DR: A nonlinear free vibration analysis of thin annular functionally graded (FG) plate integrated with two uniformly distributed actuator layers made of piezoelectric (PZT4) material on the top and bottom surfaces of the annular FG plate is presented based on Kirchhoff plate theory.
References
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Journal ArticleDOI
Finite Element Modeling of Piezoelectric Sensors and Actuators
Woo-Seok Hwang,Hyunchul Park +1 more
TL;DR: In this article, a finite element formulation for vibration control of a laminated plate with piezoelectric sensors/actuators is presented, and the static responses of a bimorph beam are calculated.
Journal ArticleDOI
The constituent equations of piezoelectric bimorphs
TL;DR: In this paper, a brief review of applications of piezoelectric bimorphs is presented, and the constituent equations which describe the behavior of bimomorphs for various mechanical boundary conditions are derived.
Journal ArticleDOI
An electronically controlled piezoelectric insulin pump and valves
TL;DR: A miniature piezoelectric pump and valves with electronic controls for programmed release of insulin is described and the pumping volume and pressure as a function of voltage are calculated and experimentally verified.