Studies on metal matrix composite railroad wheels
TL;DR: In this paper, the use of metal matrix composites in railway wheel applications is explored and the static and dynamic analysis of railroad wheels made of metal matrices is made using the finite element method.
About: This article is published in Computers & Structures.The article was published on 1993-04-17. It has received 4 citations till now. The article focuses on the topics: Metal matrix composite.
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13 citations
TL;DR: In this paper, the authors used functional graded materials (FGMs) to enhance the microstructure, mechanical properties of the gear and give better hardness between two tooth surfaces, and suggested a solution for the problem of contact surfaces in the gear tooth.
Abstract: Gears have numerous practical applications. It is an essential element for power transmission. It is used to increase or decrease the speed or change the direction of a power resource. When gears are operating, it will develop high stress concentration on the contact tooth surface. In practice most gear teeth fail due to surface contact, which is the most common failure. Selecting the ideal material for a gear tooth is significant for the purpose of operating gear system. This review study will increase additional understanding of ceramic functional graded materials (FGMs) and their applications and how these materials can solve the gear tooth surface problem. This study gives evidence that FGM is able to enhance the microstructure, mechanical properties of the gear and gives better hardness between two tooth surfaces. The conclusion will suggest a solution for the problem of contact surfaces in the gear tooth, by using functional graded materials. In the structure of FGM, the metal phase will provide strength to the gear tooth and the ceramic phase will augment the heat and wear resistance.
11 citations
TL;DR: In this article, a comparison between different types of material used in a gear structure is shown, and it is shown that a new form of cheap material may be useful for designing a new type of lighter and stiffer gear, designed for robotic arm applications or power transmission application.
Abstract: The purpose of this work is to present a clear fundamental thought for designing and investigating straight bevel gear made of composite material. Composite materials have the advantage of being light, producing low noises, and extra loading capacities. Due to these properties, it is highly preferable over conventional materials. A comparison between different types of material used in a gear structure will be shown. The outcome shows that a new form of cheap material may be useful for designing a new type of lighter and stiffer gear, designed for robotic arm applications or any power transmission application.
5 citations
Cites background from "Studies on metal matrix composite r..."
...Ramesh and Ganesan (1993) used metal matrix composites (MMC) in a railway wheel and compared them with steel and fiber reinforcement plastic (FRP) wheels from a static point of view....
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TL;DR: In this article, the orthotropic materials are selected to be used as a straight bevel gear, which have the advantage of being light, durable in high speeds, require the minimum need for oil, high strengths, and extra loading capacities.
Abstract: In this paper, orthotropic materials are selected to be used as a straight bevel gear. These materials have the advantage of being light, are durable in high speeds, require the minimum need for oil, high strengths, and extra loading capacities. Due to these properties, it is highly preferable comparing to conventional materials. This work demonstrates a standard form of the straight bevel gear, to focus on the study of the behaviour of material. Based on the complex proportional assessment method, we selected the woven roving glass fibre as an optimum material to be used in the straight bevel gear model. From the results, it was determined that the composite gear is better in terms of specific energy absorption and dynamic behaviour compared to steel gears. From the results, the jute-epoxy shows a very low value of stiffness and it can be concluded that the natural fibre is not suitable to be used as a material for a straight bevel gear.
4 citations
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TL;DR: In this paper, the suitability of different theories used for vibration studies has been investigated, viz. Love's first approximation shell theory, an improved theory with shear deformation and rotatory inertia, and a shell theory with thickness normal strain and shear deformations.
35 citations
TL;DR: In this paper, the authors calculate the stresses of a wheel with the finite element method and establish a general calculation method for the wheel's stresses, and the results of calculation show good agreement with experiments.
Abstract: Reactions between the wheel and the rail have a great effect on the strength of the railroad wheel. These forces comprise a vertical force acting on the tread of wheel and a lateral force onto the flange, and they induce high stresses on the wheel disc. Those stresses fluctuate in accordance with the rotation of wheel and cause principally the fatigue of wheel disc. However, it is usually very difficult to analyze those stresses exactly because of the specific intricate contour of wheel. the authors then calculate the stresses with the finite element method, and try to establish a general calculation method for stresses of the wheel. Results of calculation show good agreement with experiments.
5 citations
TL;DR: In this paper, 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 by steel, and a conical shell element with displacements in the axial, radial and circumferential directions has been used in the analysis.
4 citations