Thickness-twist waves in piezoelectric plates are widely used as the operating modes for acoustic wave resonators, filters, sensors, and other devices (Mindlin, 1965; Mindlin, 1967; Pearman, 1968; Bleustein, 1966; Bleustein, 1969; Yang et al., 2008a; Yang & Guo, 2006). Acoustic waves in these devices are driven by an alternating voltage applied to the electrodes deposited on the plates. Therefo...

Smart material technology has become an area of increasing interest for the development of lighter and stronger structures, which are able to incorporate sensor and actuator capabilities for collocated control. However, to obtain the optimized control performance, the actuators must be placed at locations to excite the desired modes most effectively. In this work a plate with bonded piezoelectr...

Piezoelectricity is the ability of some materials (notably crystals and certain ceramics) to generate an electric potential in response to applied mechanical stress and vice versa. Whenever this kind of materials produce an electric signal proportional to their deformation, it is said that they work as sensors, and conversely, when they convert electrical energy into mechanical one, as actuator...

Guided ultrasonic waves are frequently used for both structural health monitoring and nondestructive testing of metallic plate-like structures. Signals resulting from waves generated by one or more fixed piezoelectric transducers can be recorded around the periphery of an area of interest using a non-contact approach such as a scanning laser vibrometer. It is desired to determine the location o...

As the consumer demand for smaller, more sophisticated computers grows, the need arises for new air cooling methods that will work in geometries that mechanical fans cannot. Ionic winds (also known as electrohydrodynamic flows) are flows that are produced by the generation of a gas discharge. These flows do not require moving parts to operate, making them attractive for small form-factor device...

It is the aim to compute efficiently the deformations of the mechanical structures that are excited or damped by piezoelectric actuators. They are treated as 3D structures to have much flexibility. Special design of the finite element concept is required since the structures are thin walled and locking effects have to be avoided. Although the computations are performed in the framework of 3-dim...

This article provides a fully analytical approach for nonlinear equilibrium path of rectangular sandwich plates. The core of structure is made of symmetric cross-ply laminated composite and the outer surfaces are piezoelectric actuators which perfectly bonded to inner core. The structure is subjected to electro-thermo-mechanical loads simultaneously. One side of plate is rested on Pasternak typ...