iosr-JMCE   Volume-10 ~ Issue-1

Abstract: The economic gain of replacing sand with Crushed Granite Fines in the production of concrete was investigated. Compressive strength and slump tests were performed on fresh and hardened concrete using two nominal mixes of 1:1:2 and 1:1½: 3 with the sand component being partially replaced with Crushed Granite Fines. Compressive strength values above 30 N/mm² and 35 N/mm² were obtained for nominal mixes of 1:1:2 and 1:1½: 3 respectively when sand was partially replaced with 25 – 37.5% Crushed Granite Fines. Based on the economic analysis of the test results, replacement of sand with 25 – 37.5% Crushed Granite Fines is recommended for use in concrete production.

Keywords: Compressive Strength, Concrete, Cost, Crushed Granite Fine, Sand.

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Abstract: Clutch is mechanism which transfers the rotary motion of one shaft to the other shaft when desired. In automobiles friction clutches are widely used in power transmission applications. To transmit maximum torque in friction clutches selection of the friction material is one of the important task. In this paper, the multi plate clutch is designed by using uniform wear theory. The 3D model of multi plate clutch has been prepared using modeling software Pro/E. The structural analysis is carried out for friction plate by using analysis software Ansys Workbench 14.0. The results for stress, strain, total deformation and for strain energy are obtained. These results are compared for two different friction materials viz. cork and SF001.

Keywords: Ansys, clutch, cork, friction plate, SF001

[1] S .Jaya Kishore, M. Lava Kumar, "Structural Analysis of Multi-Plate Clutch", International Journal of Computer Trends and Technology (IJCTT) – volume 4 Issue 7–July 2013.

Abstract: Spray forming, also called spray casting or spray deposition, is the inert gas atomization of a liquid metal stream into variously sized droplets. These droplets are interrupted by a substrate which collects and solidifies the droplets into coherent, near fully dense perform. The present work concerns with this techniques. This technology was applied to produce Al-6%Si-20%Pb alloys. The spray droplets were deposited over a copper substrate to achieve a disc shape perform. After spray deposition samples were rolled at room temperature on two high rolling mills and total porosity and wear characteristic of spray deposits were studies. The total porosity decreases with the increase in the percentage of reduction in thickness of the samples. Thickness of the samples in both middle and peripheral region. Wear testing of spray formed and rolled Al-Si-Pb alloy were investigated on a pin on disc type wear machine. Wear rate behavior with applied load and increase in percentage of reduction in thickness of samples was observed. Wear rate increased with increasing the load and decreased with increase in percentage of reduction in thickness of the sample.

Keyword: Al-Si-Pb alloy, Rolling, Spray forming, Total porosity, Wear characteristic

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Abstract: The effects of Amine, Epoxide functionalization of multi-wall carbon nanotubes on properties of CNT/epoxy nanocomposites are investigated in this work. Adding CNTs to the matrix is expected to improve the stiffness, toughness, interlaminar shear strength of and many other properties of composites. Functionalization with different amino and epoxide groups of multi-walled carbon nanotubes was achieved and nanotube-reinforced epoxy nanocomposites were prepared by mixing amino, epoxide-functionalized multi-walled carbon nanotubes with epoxy resin. The reinforcement mechanism of amino-functionalized multi-walled carbon nanotubes in epoxy resin was discussed. Interlaminar shear strength (ILSS), Three point bending test and Re-bound hardness tests were used to investigate the mechanical properties of the nanocomposites and functionalization groupings are investigated by Fourier transform spectroscopy (FTIR). Then the results of amine, epoxide group are compared with No-CNT nanocomposite. The results showed that different percentage of amino, epoxide -functionalized multi-walled carbon nanotubes would have different effects on the mechanical properties of the nanocomposites. The amine functionalizes CNT composites are giving good results compare to another samples.

Key words: A. Carbon nanotubes, B. Epoxy, C. Mechanical properties

[1] H. Chen, O. Jacobs, W. Wu, G. Rudiger and B. Schadel. Effect of dispersion method on tribological properties of carbon nanotu be
reinforced epoxy resin composite. Polymer testing.2007:351-360.
[2] K.Q. Xiao, L.C. Zhang, and I.Zarudi. Mechanical and rheological properties of carbon nanotube-reinforced polyethylene
composites. Composites science and technology. 2007:177-182.