Now days the natural fiber composites arefinding wide variety of applications in automobile Industry due to its outstanding properties like low cost, light weight, Biodegradable nature, good acoustical and Mechanical properties. During last couple of years, the importance in using natural fibers as reinforcement in composites has elevated significantly both in terms of their industrial applications and basic research. The current work explains the fabrication and characterization of natural fiber based polymer composite consisting of bi-directional jute fiber as reinforcement fiber and epoxy resin as matrix material. Hand lay-up technique was used to manufacture the composite. The fabricated composite laminate was tested to study the mechanical properties of the laminate.
Low Pressure (LP) disk is considered for evaluating the structural strength at constant speed loading condition. Disk is modelled with Hexa-elements for accurate result prediction. The main objective in this case is to study the response of the structure when subjected to harmonic excitation.In the process of investigation, mathematical formulations have been made based on the principles of theory of elasticity for the geometry of disk. The same geometric models have also been analyzed using the commercial FEA software. The occurrence of flutter (Self exited Vibration) in aero engines is always a matter of great concern since this kind of aeroelastic instability can lead to high cycle fatigue (HCF) failure of engine components. The level of fidelity in the individual disciplines, together with a simultaneous integration scheme is required wherein the unsteady aerodynamic loads and motion of the structural configurations are considered for accurate prediction of structural dynamics of turbomachinery components.A harmonic response analysis has been performed to assess resonant vibratory stress amplitudes for the higher modes. Forced harmonic analysis, has been employed with gas loads at critical resonance points to estimate the alternating vibratory stresses. These are imposed on Goodman diagram, to obtain the vibratory margins available at resonant modes for the predictions of HCF life margin, for the given material and temperature. Evaluation of vibratory stresses employing Goodman criteria at resonance points indicates the capacity of blades to achieve 1e8 cycles. It is been observed that peak stress reduction is achieved which lead to LCF increase. Hence SCF chart is considered with Analysis results.
The connecting rod forms an integral part of an internal combustion engine. The connecting rod is acted upon by different types of loads while undergoing its operation. One of the main reasons contributing to its failure in fatigue is fluctuating stresses that acts on the connecting rod during engine operation. The main aim in engine design is to maximize the efficiency which can be achieved by obtaining high power to weight ratio. Therefore it becomes imperial to minimize the overall weight of the engine. The principle objective of this project is to design connecting rod which is light in weight by using various optimization techniques. In this project connecting rod is designed for a 3 cylinder petrol engine which is later modeled in CREO 2.0. This CAD model is used for optimization using Shape Finder in Ansys Workbench 14.5.
Pressure vessels are probably one of the most widespread equipment within the different industrial sectors. For many years an ISO committee (ISO TC/11, Annaratone, 2007) was dedicated to study pressure vessels and provide design guidelines with necessary codes and design procedure of pressure vessel as per ASME sec VIII Div-1 to adequately cover the intended subject matter. Our object to do just basic valve design so we following all design criteria as per ASME codes. Application of the vessel is Buffer valve, Pressure relief valve, Balancing valve, pressure control valve etc However, even when the code includes specific regulations to determine the thickness of the different components, and taking minimum thickness it will leads to make thinning vessel with required factor of safety at design temperature and pressure With minimum thickness of the shell we can make light weight vessel and low cost vessel. At the same time it may operate at safe conditions facing some issues related to structural analysis. In this project first we design a CATIA based model will be created using this information using suitable mechanical parts design software like Catia/Ansys .A Finite element analysis is carried out on this model. Then a various testing under load and dynamic condition will be tested using analysis software like ANSYS.
The objective of this study was to analyse the wear performance of a Zinc-aluminum alloy (ZA-27) which is one of the best-suited super bush bearing material. The wear performance parameters like friction, sliding distance, and dry sliding wear rate of ZA-27 were experimentally evaluated through a pin on disc tribotester. These wear parameters were compared with those obtained for the conventional bearing materials like aluminum bronze and gun metal, characterized under identical test conditions. From the experimental observations, it was found that the gun metal showed considerably better wear behavior than zinc based alloys. However, the wear rate of gun metal with respect to the pre-determined sliding distance at a specified pressure was more than Zinc based alloys. The ZA-27 was found to be best-suited bearing material because of its lower wear rate and better seizure characteristics.
CNC Vertical End Milling Machining is a widely accepted material removal process used to manufacture components with complicated shapes and profiles. During the End milling process, the material is removed by the end mill cutter. The effects of various parameters of end milling process like spindle speed, depth of cut, feed rate have been investigated to reveal their impact on Material Removal rate and surface roughness using Taguchi based grey relational analysis. Experimental plan is performed by a Standard orthogonal Array. The results of analysis of variance (ANOVA) indicate that the proposed mathematical model can be adequately describing theperformance within the limit of factors being studied. The optimal set of process parameters has also been predicted to minimize surface roughness and maximize the MRR. The experiment is performed under compressed air coolant and oil coolant using PVD coated TiAlN carbide cutter.
Near dry machining is the goal of today’s metal cutting industry that tirelessly endeavors to reduce machining costs and impact from chemicals in the environment. Modern tool tips are already capable of maintaining their cutting edge at higher temperatures, but even with these improvements in tool materials, the cutting edge will eventually break down. In Hard turning, cutting velocity (Vc) is high due to which high amount of heat is generated at the tool-chip interface which not only increase the tool wear but also deteriorates the job quality in terms of surface finish. In the present study, MQL setup used for Near Dry Machining (NDM) in turning round bars of 25mm diameter of Oil Hardening Non-Shrinking Die Steel (OHNS – AISI O1 grade) hardened to 53-57 HRC by TNMG 160404 MT TT5080 insert. The machining was carried out at three levels of Cutting Speed (vc), Feed Rate (f), and Depth of cut (ap) to investigates the performance of MQL setup in hard turning of OHNS O1 grade. Full factorial (3k) DOE was employed and 27 experiments were analyzed by using Response SurfaceMethodology (RSM) and regression equations were developed. ANOVA was used to find out the significant parameters. Depth of cut is the most influential factor in increasing the avg tool-chip interface temperature but has no effect on machining time. Second influential factor for avg tool-chip interface temp is feed rate which is highest influential in contributing to machining time. The optimum responses are at cutting speed of 170.275 m/min, feed rate of 0.07 mm/rev, 0.5 mm depth of cut for which machining time will be 19.723 sec and Avg. temperature at tool-chip interface to be 247.88oC.