The composite materials are replacing the traditional materials, because of its superior properties such as high tensile strength, low thermal expansion, high strength to weight ratio. The developments of new materials are on the anvil and are growing day by day. In this work the effect of glass fibre hybridization with the randomly oriented natural fibers has been evaluated. The sisal (S), banana (B), E-glass synthetic fibers were chopped and reinforced with polyester matrix. Six layers were prepared in the following stacking sequence of S/B/G, S/G/B, G/S/B, G/S/B/G/S/B/G, S/G/B//S/G/B, B/G/S/B/G/S. The mechanical properties like impact strength, flexural strength and tensile strength were investigated and compared. It was observed that the addition of two and three layer of glass fiber can improve the mechanical properties like tensile, Flexural and impact strength.

The objective of this paper was investigated to evaluate tensile, flexural and Impact properties of Palm fibre reinforced Epoxy composites (PFRP) and compared with Sisal fibre reinforced Polyester composites (SFRP). Untreated chopped Palmyra Palm fruit fibrewas used as reinforcement in Epoxy resin matrix and chopped sisal fibre was used as reinforcement in Polyester resin matrix. The chopped palm fibrereinforced composite were prepared in volume fractions (Vf) such as 10 %, 20 % and 30 % of specimens by using Epoxy and the chopped sisalfibre reinforced composite were prepared in volume fractions (Vf) such as 10 %, 20 % and 30 % of specimens by using Polyester. The specimens are tested for their mechanical Properties strictly as per ASTM procedures. Static analysis is performed by FEA based software ANSYS R15 with design constraints as Equivalent stress, Shear stress and deflection.The experimental result and analysis shows that the fibrevolume fraction increases the tensile, flexural, Impact strength and modulus of the fibre reinforced composites.

The machining of complex shaped designs was difficult earlier, but with the advent of the newer machining processes incorporating in it electrical, chemical & mechanical processes, manufacturing has redefined itself. Especially, the Electrochemical Machining (ECM) process is used to machine the hard to cut materials without producing heat and friction. Hence, in this work, the ECM process has been chosen to machine SS AISI 202 steel. This study establishes the effect of process parameters such as voltage, current and concentration of electrolyte on the responses on material removal rate (MRR). In this work, second-order quadratic models were developed for MRR, considering the electrolyte concentration, voltage and current as the machining parameters, using central composite design. The developed models were used for Response Surface Methodology (RSM) optimization by desirability function approach to determine the optimum machining parameters.

Wire electrical discharge machining (WEDM) is used in machining electric conductive materials for intricate shapes and profiles. This paper presents an experimental investigation on the influence of machining conditions like spark density and voltage cycle time on its performance measures like surface roughness (Ra) and cutting width (Kerf) during machining a circular contour on AA6063/SiC composites. Here, a semi cylindrical piece is removed from a rectangular plate of AA6063/SiC composites plate fabricated with reinforcing SiC in 0%, 5%, 10% and 15% weight fractions through stir casting. The effect of WEDM parameters, spark density is governed by peak current (IP) and sparking rate is governed by voltage cycle time (T) were analyzed for circular contour machining. The experimental results show that increase in SiC content in the composites leads to reduced performance measures. It is observed during the change of spark voltage application time the value of the surface roughness is decreased for the weight fraction of 0% to 5% of SiC and increased for the further inclusion of SiC in the composites.

Weight reduction is now the main issue in automobile industries. In this work due to reduce the weight of steel spring with composite leaf spring due to high strength ratio is need to improve. The main aim is to compare to the load carrying capacity, stiffness and weight savings of composite leaf spring with that of steel leaf spring at rated-load and over-load condition. The analysis has been carried out for the leaf spring made up of steel and Composite materials. Composite specimens are fabricated with two different staking sequences like the (resin with clay and enhanced with Nanoparticles). The thickness and width for constant cross section is maintained on the moulding techniques. The design of multi leaf spring was modeled in PRO-E and imported in ANSYS 14.5.the dimensions of an existing multi leaf spring is taken for modeling and analysis of a laminated composite multi leaf spring with different composite sequence materials subjected to the same load as that of steel spring.

This project focuses on the conversion of naturally available coconut fibers and shells into a useful composite. In addition to it, some mechanical properties of the resultant composite is determined and also the effect of coconut shell fillers on the composite is also investigated. The few portion of the composite is incorporated with synthetic Kevlar fiber, thus the coconut fiber is hybridized to enhance the mechanical properties of coconut. In this work two types of composite is fabricate, kevelar coconut fibre (kc) composite and kevelarcoconutfibre coconut shell filler (kccsf) composite. Coconut fibers have low weight and considerable properties among the natural fibers, while coconut fillers have a good ductile and impact property. The natural fibers and fillers are treated with Na-OH to make it free of organic impurities. Epoxy resin is used as the polymer matrix. Two composite are produced one with fillers and the other without the fillers using compression molding method. Mechanical properties like tensile strength, flexural strength and water absorption tests are done with ASTM standard. It is observed that that the addition of filler materials improves the adhesiveness of the fibers leading to the increase in the above mentioned properties. The density of the composite is also low hence the strength to weight ratio is very high. The water absorption test also showed that the resultant composite had a small adhesion to water and absorption of water.

Generally, engineering materials must have some specific characteristics and those characteristics which are important in selecting material for specific applications related with material structure and life-time. It is difficult to find all these features especially mechanical and surface properties in a single material. So the solution is found by increasing the strength of bulk material, and increasing wear and corrosion resistance of the surface. Therefore, engineering materials are selected from cheaper materials providing needed structural features, and the other surface characteristics are provided from coatings. Friction and wear of the sliding components in an automobile cause an increase in both fuel consumption and emission. Many engine components involved with sliding contact are all susceptible to scuffing failure at some points during their operating period. Therefore, it is important to evaluate the effects of various surface coatings on the tribological characteristics of the automobile parts. In this study, the corrosion protective properties of Vacuum Arc Evaporation PVD coatings were investigated and the relation between corrosion protective properties was investigated.

The current trend in the machine tools market is to produce machines capable of faster cutting speeds. The level of vibration in a machine tool has always influenced the accuracy, both dimensional and geometrical, of the product machined. Increasing structural stiffness could help in avoiding these problems. Alternate materials which could increase the structural stiffness while enhancing other characteristics including damping simultaneously should be used for machine tool structures. On the other hand, epoxy composite has exceptional damping characteristics. In this work, the bed of the Vertical Machining Center was considered for modifications to enhance both its stiffness and damping characteristics. Finite element analysis (FEA) was also carried out for standard dimensions of hybrid samples of different steel face thicknesses. Static and modal analysis were carried out for the hybrid samples. From the results of the analysis the optimum thickness of the steel face for the bed is determined as 1.5 mm. The bed of Vertical Machining Center (VMC) was modeled using Pro/E and the finite element analysis of the bed was carried out. Static and modal analyses of the bed were carried out using ANSYS. The hybrid samples containing epoxy concrete core and steel face were fabricated. From the experimental results the damping factor of hybrid samples is calculated as 0.45 which is higher than the damping factor of cast iron (damping factor = 0.2).