Research Articles in Automotive Engineering

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Browsing Research Articles in Automotive Engineering by Author "Adegbola, Adekunle A."

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    DEVELOPMENT AND CHARACTERIZATION OF MODELING DEFORMATION OF AL-CU ALLOY
    (Materials Science and Technology (MS&T) 2014, 2014-10-16) Adegbola, Adekunle A.; Olapade, Julius; Alabi, Ismaila O.; Ghazali, Akeem; Ekundayo, Emmanuel; Fashina, Olugbenga; Kareem, Mutiu; Olaniyan, Abolade; Oke, David
    The development and morphology of Al-9.37Cu alloy was characterized through metallographic examination and failure rate. The alloy was obtained by employing Die -Casting Technique before being subjected to series of mechanical and materials tests. The result showed that the strength of Al9.37Cu was greatly enhanced when the alloy was under different percent of deformations between 5-15%. Constitutive model was adopted to determine the isotropic material property in which the plane stress and plain strain conditions were considered as boundary conditions. Consequently, the effect of temperature was able to influence the strain rate in which the fracture strain determined the failure rate of the Al-Cu alloy.
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    EFFECTS OF THERMOMECHANICAL TREATMENTS ON THE CHEMICAL AND MECHANICAL PROPERTIES OF Al-Cu Alloy
    (International Journal of Materials, Methods and Technologies, 2014-01-20) Adegbola, Adekunle A.; Olapade, Julius; Aderonmu, Mudasiru; Salawu, Ismaila; Alabi, Ismaila O.; Kareem, Mutiu; Omotoyinbo, Joseph A.; Olaniran, Oladayo
    The development of Al-9.37Cu alloy was characterized through metallographic examinations. The alloy having been cast using Die –Casting method was subjected to series of treatment such as solution treatment, water quenching and air-quenching as well as over –ageing. The result showed that the strength of Al9.37Cu was greatly enhanced when the alloy was rolled, and aged. This was as a result of the growth of large precipitates along and near the Aluminum grain boundaries which interfere with the movement of dislocations when the metal yields. However, when the alloy was heated beyond 200oC (500oC), the tensile values were observed to decline as a result of equilibrium tetragonal phase which is fully in –coherent and was characterized with low strengthening effect due to fibrous structures.
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    Heat Transfer Analysis in Internal Combustion Engine Piston Using Comsol Multiphysics: A Case Study of Tri-Cycle
    (International Journal of Scientific & Engineering Research, 2016-07-30) Oke, David B.; Alabi, Ismaila O.; Adegbola, Adekunle A.
    The transient nature of heat flowing involving more than single variable, complicated method of measuring temperature across the length of the liner and ambiguous boundary conditions pose serious problems for the analysis of heat transfer rate on the piston of an internal combustion engine using FEM (Finite Element Method). This present study analyzed the heat transfer rate on the piston of a Tri-cycle engine. The studied piston was selected based on its applications in automobile and other engineering applications. The analysis was basically on the transient state forced-convection and conduction heat transfer. As initial condition, the temperature distributions were considered along the piston at a range of 523K – 673K. The parameter used for the simulation were liquid (Gasoline), Gases (Air) and Aluminium silicon UNSA96061 (Piston). The modeling and simulation were performed by using COMSOL-Multiphysics 4.3a software. The mesh optimization was undertaken by using FEM techniques to predict the maximum and mimimum temperature on the piston at every stages of simulation with time dependent. It was discovered that the temperature along the piston of the try-cycle varies with respect to time. The transient analysis revealed that the temperature of the piston at the TDC (Top Dead Center) in the first power stroke is higher compare to the subsequent power strokes, which is an indication that more heat is transfer at subsequent power strokes. Probable recommendations were later made.