Deflection (engineering)

About: Deflection (engineering) is a research topic. Over the lifetime, 30862 publications have been published within this topic receiving 298849 citations.

Axisymmetric Behavior of an Elastic Spherical Shell Compressed Between Rigid Plates

Abstract: Abstract : The paper presents an analysis of stresses and deflections produced in a thin, complete spherical shell when it is compressed between two parallel rigid plates. The analysis accounts for finite deflections and rotations, but assumes that the material remains linearly elastic throughout the deformation. It is also assumed that the region of the shell which is in contact with the plate remains flat. The deformation state at which the contact region buckles is given. (Author)

Evaluation of length-scale effects for mechanical behaviour of micro- and nanocantilevers: II. Experimental verification of deflection models using atomic force microscopy

Abstract: This paper is the second of two parts that reports on evaluating the length-scale effects for micro- and nano-sized silicon cantilevers using experimental data provided by atomic force microscopy. The tip deflections estimated with the conventional tip deflection model and the modified deflection model incorporating the length-scale factor are determined and compared with the experimental data. These comparative data demonstrate that the length-scale factor should be considered in accurately estimating the tip deflection of the micro- and nano-sized cantilevers. We also present the effect of the length-scale factor on the stiffness of the cantilevers, which also indicate that the classical models derived for macro-sized cantilevers cannot be used to accurately estimate the bending stiffness of the micro- and nano-sized cantilevers. The implications of accurately estimating the tip deflection and stiffness for micro- and nanocantilever sensors are discussed and it is concluded that when these sensors are used in the static mode, the modified deflection model should be used in estimating the mass of the species of interest binding (analyte) on the surface of the cantilevers.

Micro-opto mechanical switch integrated on silicon

Abstract: A micro-opto-mechanical switch 1*2 has been achieved using a combination of two technologies, integrated optics and micromachining on silicon The commutation is obtained by means of the mechanical deflection of a cantilever beam driven by an electrostatic force The first functional results are reported

Modeling and Shape Control of Piezoelectric Actuator Embedded Elastic Plates

Abstract: Future technologies in microsensing, microactuation, active changes in shapes of aerofoils and turbine blades justify and necessitate a comprehensive study of piezo actuators for shape control of structures. Piezo materials have the property to develop strain on applying voltage and voltage on applying strain, hence, these materials are useful both as sensors and actuators. If a piezo actuator is bonded to a substrate plate, on applying voltages, the resulting strain in the actuator induces a deflection in the plate. This deflection is a function of geometry, material properties of ac tuator and substrate, layout of piezo actuators, and voltage inputs to the actuators. The objectives of this paper are: (a) to develop a mathematical model for deflection of a thin plate embedded with piezo actuators using elastic plate theory, (b) to compute plate deflection by solving the mathematical model using finite difference technique, and (c) to estimate optimal actuation voltages to match the deflection of the plat...

General solution of a density functionally gradient piezoelectric cantilever and its applications

Abstract: We have used the plane strain theory of transversely isotropic bodies to study a piezoelectric cantilever. In order to find the general solution of a density functionally gradient piezoelectric cantilever, we have used the inverse method (i.e. the Airy stress function method). We have obtained the stress and induction functions in the form of polynomials as well as the general solution of the beam. Based on this general solution, we have deduced the solutions of the cantilever under different loading conditions. Furthermore, as applications of this general solution in engineering, we have studied the tip deflection and blocking force of a piezoelectric cantilever actuator. Finally, we have addressed a method to determine the density distribution profile for a given piezoelectric material.