Sajad Hussain Din

Metal Matrix Composites are engineered materials with a combination of two or more dissimilar materials to obtain enhanced properties. The widespread acceptance of particulate metal matrix composites (MMC) for engineering application has been hindered by the high cost of producing components. Advanced composite materials like metal matrix composite is gradually becoming very important materials in manufacturing industries e.g. aerospace, automotive and automobile industries due to their superior properties such as light weight, low density, high strength and absorb vibrations. In today's life high performance on low cost product is required and well needed. In this present investigation Al (6061) alloy has been used as a matrix material and agro waste rice husk ash (RHA) as an reinforcement to form a composite by using two step stir casting process. RHA has been used because it is the only agro waste which contains the maximum amount of silica. Since RHA is obtained as a byproduct solid waste during milling of rice it is completely free of cost and available in abundance. To assess the performance of the composites the mechanical properties, microstructural analysis were used.

The analysis was carried out on diesel engine cylinder liner. The temperature distribution, stress distribution and displacement in cylinder liner, were investigated using ANSYS12 APDL. The emphasis of this study was to predict the, stress distributions of cylinder liner. The cylinder liner model was generated in ANSYS12 APDL package. Various mesh configurations were obtained in the meshing section of the package. The temperature distribution, stress distribution and displacement, were predicted along the cylinder liner. The results obtained for stress distribution show that the maximum stress occurs at the flange of the cylinder liner. Since increase in temperature of cylinder liner increases the stresses. Therefore, pitting takes place at the flange of the cylinder liner. The pitting results due the formation of excessive stresses. The pitting initiates the fracture followed by fatigue crack initiation, crack growth and final fracture.