Volume 06 Issue 02
Experimental Study on Mechanical Properties of Carbon Fiber/Epoxy Resin in Addition of Reinforcement on Filler Material
M. Santhanam, K.N. Ramu, S. Jeyan, K. Sakthivel | pp: 44-49 | Download Paper | Show Abstract
Abstract: In this experimental work, carbon-fiber reinforced polymer composite with an epoxy resin and tri-ethylene tetramine hardener containing the filler composite materials such as SiC, Al2O3 and ZnO2 added and fabricated by hand lay-up technique at ambient temperature, three samples are fabricated and their mechanical properties are studied such as tensile, flexural and impact are studied. All samples are taken for test, carried out according to ASTM standard. To find the significant effect of filler material added in carbon fiber reinforcement composites material mechanical properties are analyzed. The mechanical properties test results shows that sample 3 composites have excellent tensile strength (282MPa) and flexural strength (25.6 MPa) compared to other composites, due to good interfacial bonding between particulates and the epoxy matrix. The test result shows that composites sample 2 is maximum impact strength (7 joules) and the hardness value is highest for Sample 2 filled composite, the reason being filler material uniformly mixed with matrix.
Synthesis and Characterization of PVA-Aloe Vera Blend Nanofiber
X. Joshnaa Catherine, T. Malarvizhi, S. Durgadevi | pp: 50-53 | Download Paper | Show Abstract
Abstract: Nanotechnology is the science which deals with materials which have size ranging from 1-100nm.The nanomaterials can be in the form of cubes, sheets, wires, fibers. They have a wide range of applications in various fields like medical, mechanical, electrical fields. In medical field, nanomaterials are used as diagnostic tools and as carriers for targeted drug delivery. Nanofibers are widely produced by electrospinning method. Electrospun nanofiber shows a number of outstanding properties such as high surface area, light weight and high porosity. The sample solution was prepared using Aloe Barbadensis (Aloe vera), Cynodon dactylon (arugampul) and polyvinyl alcohol (PVA) with different concentration for the synthesis of nanofiber. The biological activities of aloe vera include promotion of wound healing, antifungal activity, hypoglycemic or antidiabetic effects anti-inflammatory, anticancer, gastro protective properties, and immunomodulatory. Whole plant of Cynodon dactylon is traditionally used to treat painful and inflammatory conditions. PVA is a water soluble and biodegradable polymer and is considered as a good candidate for fabrication of composites containing nanofiber. The nanofibers produced can be analyzed by Scanning Electron Microscopy (SEM). The electrospun blend nanofibre will be used for the drug delivery and adsorption process.
Performance Analysis of Scramjet Engine with Different Nozzle Angles
S. Vivek, M. Sathiyaseelan, G. Suresh, G. Muthu, S. Srinivasan | pp: 54-58 | Download Paper | Show Abstract
Abstract: The main objective of this project was, to design a scramjet engine and analyzing the exhaust nozzle using ANSYS fluent for various Mach number by using petrol as fuel and calculating the velocity at the exhaust of the engine. This engine contains a combustion chamber, fuel injector ignition system and also an exhaust nozzle but without an inlet convergent part instead it was given with the required supersonic flow directly. The supersonic flow was produced under the principle of isentropic flow such a way when air was been released at a pressure difference of less than 0.528. Ultimately the flow was supersonic which was ideally expanded through a supersonic nozzle to reduce shock waves and that was given as inlet to the scramjet engine thereby igniting the fuel and studying the thrust produced by the engine after combustion .In this work the supersonic flow for various conditions were completely analyzed using Mach number 2.28. Various things like the Mach loss exhaust expansion and the shock waves produced were analyzed for three different kinds of nozzle by having 10º exhaust angle, 12º exhaust angle and 15º exhaust angle. The results obtained after analysis provided the ideal nozzle for the use in this scramjet engine. Similarly, the experimental analysis has shown very good agreement with the numerical analysis which was performed in ANSYS.
CFD Analysis on Various Commercial Vehicles to Evaluate the Aerodynamic Characteristics – A Comparative Study
J.V. Muruga Lal Jeyan, Krishna S Nair, Godwin Vincent | pp: 59-63 | Download Paper | Show Abstract
Abstract: Performance, handling, safety and comfort of an automobile vehicle are significantly affected by its aerodynamics. High brake power of the engine is not enough to evaluate the performance of vehicle. Aerodynamics plays a significant role in vehicle design and development especially while designing the stability aspects after certain speed. Drag forces has significant impact on efficient drive of the vehicle. In fact, the fuel economy is majorly affected by the vehicle design. In the present study, flow analysis has been done on various commercial cars. The prime objective of an automobile company is to improve the fuel efficiency by minimising the drag. Different scaled models of the different cars have been selected which includes Audi Q7, Jeep Compass, Toyota Altis and Volkswagen Polo. A CFD analysis has been performed on all these models using ANSYS FLUENT. Pressure and velocity distribution have been computed for three different sir velocities 30m/s, 50m/s and 75m/s. Stagnation points have been identified along with the velocity distribution on the windshields. Some of the preventive measures have been identified while designing such vehicles. A comparative analysis has been done for the different vehicles and various conclusions have been framed.