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Journal ArticleDOI

Stresses in a railway wheel due to an impact load

17 Jan 1993-Computers & Structures (Pergamon)-Vol. 46, Iss: 2, pp 231-235

AbstractThe stresses arising in a railway wheel due to an impact loaded are presented in this paper. The wheel is modelled using a string of conical shell finite elements. The response of the wheel to an impact loaded is analysed using the modal superposition technique. The stresses at various locations on the wheel are determined and compared with those arising due to a static load.

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Citations
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Journal ArticleDOI
01 May 2005
Abstract: Out-of-round rollingstock wheels are caused by skidding or spalling of the wheel tread and by dynamic motion of wheels and wheelsets in service. Out-of-round wheels generate impact forces at the wheel-rail interface, which are transferred to train and to track components including rail and both bolted and welded rail joints, prestressed concrete sleepers, ballast, wheels, and bearings.To make a rational decision about removing out-of-round wheels from service, estimation of the damage caused by an individual wheel is required. Previous studies have used analytical and numerical models to illustrate the distribution of impact into track and rolling stock components. These models are compared here. The review details mathematical models and studies of the lives of the earlier-listed components, which would provide a means of determining the damage caused by impacting wheels. In addition, studies have found that impacting wheels increase fuel consumption and increase pass-by noise levels, which are a...

91 citations


References
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Journal ArticleDOI
Abstract: Composite materials have been finding increasing applications in the field of transportation. A U.S.A. patent suggesting the use of composite materials for railway wheels is the basis for this paper. In thispaper, the natural vibrations of railway wheels made of composite materials have been theoretically estimated by the finite element method and compared with those in wheels made of steel. A thick conical shell element with displacements in the axial, radial and circumferential directions has been used in the analysis. This element brings out the coupling between the different modes of vibration, and this aspect is important in the dynamic analysis of composite wheels. Three geometries of wheels and two materials (Kevlar-epoxy and graphite-epoxy) have been used in the study. For each of these materials, two fiber orientations (radial and circumferential) have been taken up and their natural frequencies determined.

4 citations

Journal ArticleDOI
Abstract: This paper explains the application of the Finite Element Method to the dynamic analysis of roller clutch sleeves which largely find their application in starter motors. The present approach is semi-analytic which reduces the three-dimensional problem to a two-dimensional one. The sleeve is taken as a rotationally symmetric solid. The cross section is divided into triangular elements. The first few natural frequencies and their associated eigenvectors are obtained using a simultaneous iteration scheme. The transient force function is expanded into Fourier series and the problem is solved independently for each Fourier index. The first few converged natural frequencies and the associated eigenvectors are used for finding the response of the sleeve using modal superposition technique. The displacements and stresses are computed for each harmonic and are combined to get final displacements and stresses for each time step.

3 citations