In this article, axisymmetric buckling behavior of piezoelectric fiber reinforced polymeric composite (PFRPC) annular plate subjected to electro-thermo-mechanical field is presented utilizing principle of minimum potential energy. Boron-nitride nanotubes (BNNTs) are used as fibers. Full coupling between electrical, mechanical and thermal fields are considered according to a representative volum...

This study carries out the edge-reflection analysis of guided waves in a 3-D plate. First, we excite an incident guided wave by applying a normal traction on the surface of a 3-D plate. The excited wave field is obtained in the frequency and wavenumber domains. Secondly, we perform the edge-reflection analysis in the frequency and wavenumber domains by applying the mode-decomposition method to ...

A new transducer beam model is developed for the generation of Rayleigh surface wave and Lamb plate waves by an angle beam transducer, which is one of the configurations commonly used for the generation of these wave types. The beam model is a fully 3-D model that takes into account the fields generated by the transducer acting on the surface of a wedge. The model also accounts for the leaky wa...

An analytical solution for a sandwich circular FGM plate coupled with piezoelectric layers under one-dimension heat conduction is presented in this paper. A nonlinear static problem is solved first to determine the initial stress state and pre-vibration deformations. By adding an incremental dynamic state to the pre-vibration state, the differential equations are derived. The role of thermal en...

It is shown that thermal waves applied on the bounding surface of a horizontal slot generate pumping effect. Reynolds stress developed by change in flow field due to inertia associated with penetration wave into fluid interior drives net movement direction. The induced rate increases speed, but excessive speed reduces it as convection becomes limited only near-wall area. increase wavelength and...

Earth's lowermost mantle has thermal, chemical, and mineralogical complexities that require precise seismological characterization. Stacking, migration, and modeling of over 10,000 P and S waves that traverse the deep mantle under the Cocos plate resolve structures above the core-mantle boundary. A small -0.07 +/- 0.15% decrease of P wave velocity (Vp) is accompanied by a 1.5 +/- 0.5% increase ...

This paper reports automatic compensation of strong thermal lensing in a suspended 80 m optical cavity with sapphire test mass mirrors. Variation of the transmitted beam spot size is used to obtain an error signal to control the heating power applied to the cylindrical surface of an intracavity compensation plate. The negative thermal lens created in the compensation plate compensates the posit...

A non-linear wave model for a distillation column has been extended and then examined for binary and ternary systems by including enthalpy and hold-up effects, these being significant for wide boilers and leading to variable molar flows and holdups. Application of the coherence condition to the system mass and energy balance equations confirms that, for an n-component system, any disturbance or...