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Deflection (engineering)

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


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Journal ArticleDOI
TL;DR: In this article, a rational and relatively simple method for predicting deflection of fiber-reinforced polymer (FRP) reinforced concrete members is presented. The method is based on the integration of the moment-curvature relation, which is assumed to be trilinear.
Abstract: This paper presents a rational and relatively simple method for predicting deflection of fiber-reinforced polymer (FRP) reinforced concrete members. The method is based on the integration of the moment-curvature relation, which is assumed to be trilinear. The relationship is based on the assumption that the moment-curvature relation of a cracked FRP reinforced member remains linear under increasing load, and that tension stiffening is negligible. Based on this method, closed-form maximum deflection formulas are derived for a number of common loading and support conditions. The results of the proposed method compare well with available experimental data.

64 citations

Journal ArticleDOI
TL;DR: In this paper, an analytical method of the small scale parameter on the vibration of single-walled Boron Nitride nanotube (SWBNNT) under a moving nanoparticle is presented.
Abstract: In this study, an analytical method of the small scale parameter on the vibration of single-walled Boron Nitride nanotube (SWBNNT) under a moving nanoparticle is presented. SWBNNT is embedded in bundle of carbon nanotubes (CNTs) which is simulated as Pasternak foundation. Using Euler–Bernoulli beam (EBB) model, Hamilton's principle and nonlocal piezoelasticity theory, the higher order governing equation is derived. The effects of electric field, elastic medium, slenderness ratio and small scale parameter are investigated on the vibration behavior of SWBNNT under a moving nanoparticle. Results indicate the importance of using surrounding elastic medium in decrease of normalized dynamic deflection. Indeed, the normalized dynamic deflection decreases with the increase of the elastic medium stiffness values. The electric field has significant role on the nondimensional fundamental frequencies, as a smart controller. The results of this work is hoped to be of use in design and manufacturing of smart nano-electro-mechanical devices in advanced medical applications such as drug delivery systems with great applications in biomechanics.

64 citations

Journal ArticleDOI
TL;DR: A generalized curve has been proposed to quantify the damage in a fixed beam by taking envelop of all maximum WCs of the deflection response measured at damage points, which is very difficult to measure deflection at several points, as a large amount of instrumentation needs to be installed to measure the response.
Abstract: A new method has been proposed to detect the location and also to quantify the crack using the deflection response of the damaged beams alone. The deflection is measured at a particular point for various locations of a concentrated load on the beam. This static deflection profile is used as the input signal for wavelet (Symlet) analysis. Due to variation in deflection at some points, compared to their adjacent points, peaks are seen in the wavelet coefficient (WC) plot. These peak points are identified as damage points along the length of the beam. The peaks can also be seen at sensor point and supports. These can be eliminated by performing wavelet analysis for the deflection profile measured at another point. In a real damaged structure, it is very difficult to measure deflection at several points, as a large amount of instrumentation needs to be installed to measure the response. This practical difficulty can be avoided by minimizing the number of measuring points in the field as explained in the present work. A parametric study has been carried out by varying the damage, location of damage, intensity of load, flexural rigidity, and length of the beam. It has been observed that the WCs change with variations in damage, location of damage, intensity of load, flexural rigidity, and length of the beam. A generalized curve has been proposed to quantify the damage in a fixed beam by taking envelop of all maximum WCs of the deflection response measured at damage points.

64 citations

Journal ArticleDOI
TL;DR: In this paper, the effects of in-plane thermal load on the transverse bending deflection are taken into account, and the unsteady aerodynamic pressure in supersonic flow is evaluated by the linear piston theory.

64 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202247
20211,006
20201,140
20191,262
20181,195
20171,215