Yazar "Ikpe, Aniekan E." seçeneğine göre listele

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    Design of Used PET Bottles Crushing Machine for Small Scale Industrial Applications
    (İstanbul Gelişim Üniversitesi Yayınları / Istanbul Gelisim University Press, 2017-09-26) Ikpe, Aniekan E.; Ikechukwu, Owunna
    In this study, PET bottles crushing machine was designed to convert used PET bottles into shreds readily available for recycling. Preliminary tests and mechanical factors were extensively evaluated on the conceptual designs to ensure that the concept with optimal performance and efficiency is selected. Experimental test was conducted to determine the power required to overcome the shear stress of the PET bottles and it was found out that 10hp was the power required. With a set of crushing forces ranging from 1000-3000N, Finite Element Analysis (FEA) was performed for five different scenarios on the 201 Annealed Stainless Steel cutting blade to inspect the material response to stresses and corresponding deformations. The maximum von Mises stress was 2.089e+006N/m^2. The material yield strength was found to be 2.92e+008 N/m^2, and applying a force of 3000N on the cutting blade produced a maximum displacement of 2.220e-003 mm. This therefore imply that the material will not deform or fail under a force equal to or below the material yield strength value. Tests carried out on the final machine design indicated efficiency of 82.2% which is only 6% less than the efficiency of existing ones.
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    Effects of Arc Voltage and Welding Current on the Arc Length of Tungsten Inert Gas Welding (TIG)
    (İstanbul Gelişim Üniversitesi Yayınları / Istanbul Gelisim University Press, 2017-12-13) Ikpe, Aniekan E.; Ikechukwu, Owunna; Ikpe, Ememobong
    The effects of welding current and arc voltage on arc length was investigated. Mild steel plates of 10mm thickness and 50mm x 100mm diameter were joined together through Tungsten Inert Gas (TIG) welding process for four (4) different intervals and the welding arc lengths were measured consecutively. The measured arc length for each welding interval increased from 1.19mm, 1.93mm, 2.54mm and 3.12mm as the current increased from 50A, 100A, 150A to 190A while the voltage also maintained the same increasing trend from 200V, 240V, 280V to 320V. The minimum arc length values measured for each welding interval with the aforementioned current and voltage range also maintained an increasing trend, and that led to the conclusion that the higher the welding current and arc voltage, the longer and wider the arc length which is an influential factor to other welding attributes.
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    Engineering Material Selection for Automotive Exhaust Systems Using CES Software
    (İstanbul Gelişim Üniversitesi Yayınları / Istanbul Gelisim University Press, 2017-06-28) Ikpe, Aniekan E.; Orhorhoro, Ejiroghene Kelly; Gobir, Abdulsamad
    The aim of this report is focused onreviewing the automotive exhaust system with respect to its in-service conditionsand selection of suitablematerials for exhaust manifold, downpipe silencer/ muffler box and tail pipe in an exhaust system. In doing this, the functions of each component were discussed, highlighting how they function as part of a system and CES Edupack software was employed in the material selection process. Mass, cost, high temperature (>800oC for exhaust manifold and >400oC for downpipe silencer/ muffler box and tail pipe) and high corrosion resistance were used as criteria for the material selection. Variety of materials including Nickel-based superalloys, stainless steel, Nickel-chromium alloys were obtained in the search result for exhaust manifold. Similarly, low alloy steels, stainless steel, grey cast iron,Nickel-based superalloys, Nickel-chromium alloys were obtained in the search result for downpipe silencer/ muffler box and tail pipe. Nickel-based superalloys and Nickel-chromium alloys possess suitable properties for this application, but were not selected due to their high densities and high cost. Low allow steels were not selected because they tends to exhibits poor corrosion resistance when exposed to salt on the road surface and condensate from the exhaust system. Grey cast iron has low tensile strength and elongation and therefore not exhibit enough toughness required to withstand the severe working conditions.However, stainless steel (Ferritic stainless steel and Austenitic stainless steel) was selected due to its considerable price, low density, excellent corrosion resistant and acceptable strength at elevated temperatures.