13 research outputs found
Design and Analysis of Hexagonal and Octagonal Honeycomb Structures
No full textDue to the cost effectiveness, the automotive industries are specifically looking for different combination of materials for optimizing the production control and cost variation to bring up luxury design of interior and exterior look of the vehicle bodies. High strength, low weight is the major criteria in the selection. Honey comb sandwich materials with different structures play a key role in the automotive sector for obtaining good strength and durability. In this project the designs of hexagonal and octagonal honey comb structures are analyzed and compared. The structures developed by using Solid-Works 2018 software. Solid-Works 2018 flow simulation is to be used to test the effectiveness and limitations of the structures. Thermal and static analysis are performed with different types of materials like Titanium, Aluminum, Stainless steel to identify the best material for low cost and high-efficient by applying various loads
Design Analysis of Low Speed Flywheels For Automobiles
No full textThis paper concentrates on investigating the impacts of flywheel geometry on its vitality stockpiling or convey capacity per unit mass, additionally characterized as most extreme particular vitality. In this paper we have investigated different profiles of flywheel and the put away active vitality per unit mass is ascertained for the separate flywheel. Different profiles are outlined and examination in CAE instrument (CATIAV5). investigation is done for various states of the flywheels and von mises stresses and aggregate misshapening are resolved. It demonstrates that shrewd plan of flywheel geometry significantly affect the Specific Energy stockpiling and decrease the operational burdens applied on the pole because of lessened mass at high rotational rates. Proficient flywheel configuration used to boost the latency of minute for least material utilized and assurance high unwavering quality and long life
Design Evaluation and Analysis of Vapor Compression Cooling Cycle With Change In Span of Condenser
No full textRefrigeration is a procedure of moving warmth starting with one area then onto the next in controlled conditions. This procedure is customarily determined by mechanical energy, however can likewise be driven by providing heat energy, attraction, laser and different means. Refrigeration has numerous applications, and is restricted to: family unit fridges, mechanical coolers, cryogenics, and ventilating. Majority of refrigerator system works on vapour compression refrigeration system. This system consists of compressor, condenser, expansion valve and evaporator. The performance of the system depends upon these system components. The performance parameters of simple vapour compression refrigeration system (VCRS) were studied functioning under transient conditions during cooling of a fixed mass of R-404A from room temperature to sub-zero temperature. In this thesis, COP of the VCR system for different diameters of the condenser tube using the specific end conditions is analyzed using ANSYS for the best performance of the system
Detection of Delamination in A Composite Beam By Using Vibration Analysis
No full textDelamination is the separation of layers which are fortified together in composite cover. It is a typical harm in fiber strengthened composite overlays, normally avoided outer view. On account of bowing burdens delamination as a rule prompts critical loss of twisting firmness and quality. Accordingly, it is essential to distinguish the nearness of delamination at a beginning time on the grounds that early harm discovery assumes a critical part to ensure security and unwavering quality of in-benefit structures. The delamination causes diminishment of solidness and in this manner the modular frequencies likewise change. In this work modular investigation is utilized to decide the delamination in the composite structure. This is finished by making a four-layer multi directional overlay of E-Glass/Epoxy in ANSYS 15.0. A parametric report is led by changing length of the delamination in the center layer by shifting limit conditions. The outcomes got from the numerical displaying is approved with the outcomes acquired from the explanatory demonstrating in view of the transverse vibration of the composite shaft for the settled free, basic, settled limit conditions.Harmonic analysis is done to observe the resonating and anti-resonating peaks for the intact composite beam and delaminated composite beam with fixed-free, simple-simple, fixed-fixed boundary condition. Amplitude values of the beam also obtained from this harmonic analysis by varying the length of the delamination for the beams with different boundary condition
Analysis of Sandwich Beam
No full textSandwich beams are composite systems having high stiffness-to-weight and Strength-to-weight ratios and are used as light weight load bearing components. The use of thin, strong skin sheets adhered to thicker, lightweight core materials has allowed industry to build strong, stiff, light, and durable structures. Due to the use of viscoelastic polymer constituents, sandwich beams can exhibit time-dependent behaviour. This study examines the behaviour of sandwich beams driven by the viscoelastic rubber core. Finite element (FE) method is used to analyze the overall transient responses, harmonic responses and the static responses of the sandwich systems subject to a concentrated point load at the mid span of the beam. In this study the skin, i.e. the top and bottom layers are made up of mild steel while the core is made up of rubber. The stress, strain, and deformation fields are analyzed. The core thickness is varied keeping the skin thickness constant and the behaviour of the sandwich beam is studied under static and dynamic conditions
Characterization Of Epoxy Composites Reinforced With Short Palmyra Fibers
No full textUsually a new composite material’s performance is often determined by its response under various mechanical, physical, tribological and thermal conditions as it gets very much essential for selecting materials of appropriate composition for application in a particular area. Subsequently, in the present examination, a wealth of property data has been accommodated an arrangement of epoxy-SPF composites by preparing them through hand-lay-up system and via doing different physical, mechanical, tribological, acoustic and warm tests on them under controlled research center conditions. It is watched that by fortifying short palmyra filaments into the flawless epoxy sap, its belongings, as wanted are accomplished as improved mechanical, physical, tribological, warm and acoustic properties. At the point when the centralization of SPF in the slick epoxy is expanded, the particular wear rate diminished slowly and in the meantime a decrease in the compelling warm conductivity is likewise seen as palmyra fiber is insulative in nature. This is joined by increment in both elastic and flexural quality. Further, the sound assimilation coefficient additionally expanded by a tremendous edge as the SPF fixation in the perfect epoxy expanded. The impacts of SPF content on the coefficient of warm development and glass change temperature of the composites are additionally observed to be critical. With a direct quality, diminished wear rate, high coefficient of sound assimilation and brought down warm conductivity, these epoxy-SPF composites can be effectively utilized for applications, for example, building protection material, sustenance compartments, inside of cars, inside mass of lobbies where sound retention in required, canteen flagons, bundling ventures, rollers of transport lines, brake cushions, and so forth
Developing A Hexapod Walking Machine
No full textThis project deals with the walking machines. A brief history and the evolution of the walking machines which are classified based on their legs, different walking mechanisms exists out of which Theo Jansen’s walking mechanism was considered as it has single degree of freedom, walking mechanism is theoretically simple and efficient. Vigorous endeavours were encountered in applying the mechanism and toiled in enhancing various parameters to redefine the stability of the model and improving the total efficiency of the model using an optimization technique which is Genetic Algorithm. The first part of this thesis deals with the basic introduction of the walking machines. Like the classification operation and advantages of the walking machines. The criteria’s for the adaption of Theo Jansen mechanism Over The Other mechanism are discussed. Secondly the problems encountered in the application of the mechanism to the prototype design, the implementation of the Genetic Algorithm and the code to optimize the mechanism were discussed with sample results are showcased. Thirdly Justification of the results that were obtained from the genetic algorithm is done using CAD software solid works. The various design parameters like the stresses developed due to various forces applied on the mechanism while walking are analyzed the stresses and strains on each link are evaluated Velocity and acceleration plots for each joint and legs are also plotted. A Prototype was developed to validate the Kinetic and kinematics models of the walking mechanism and the practical constraints that are encountered were discussed in the final part of the thesis. The thesis concludes by discussing the various aspects that need to be considered for the future prototypes based on the Theo Jansen mechanism and the core idea of building a scalable machine which can be used like a transport walking machine in rugged and harsh conditions
Finite Element Study of Behavior of Sandwich Beam Under Static And Dynamic Conditions
No full textSandwich Beams are broadly utilized in the development of aviation, common, marine, car and other elite structures because of their high explicit firmness and quality, phenomenal weariness opposition, long toughness and numerous other better properties thought about than the regular metallic materials. Sandwich shafts are composite frameworks having high solidness to-weight and Strength-to-weight proportions and are utilized as light weight burden bearing parts. The utilization of flimsy, solid skin sheets clung to thicker, lightweight center materials has enabled industry to construct solid, firm, light, and strong structures. Because of the utilization of viscoelastic polymer constituents, sandwich shafts can show time-subordinate conduct. This investigation looks at the conduct of sandwich bars driven by the viscoelastic elastic center. Limited component (FE) strategy is utilized to break down the general transient reactions, symphonious reactions and the static reactions of the sandwich frameworks subject to a gathered point load at the mid range of the pillar. In this examination the skin, i.e; the top and base layers are comprised of mellow steel while the center is comprised of elastic. The pressure, strain, and twisting fields are broke down. The center thickness is differed keeping the skin thickness consistent and the conduct of the sandwich bar is considered under static and dynamic conditions. In this proposition static and dynamic investigation of sandwich shafts with various center thickness under essentially bolstered condition is considered. Parametric investigations demonstrate that the variety of center thickness significantly affects the common frequencies and mode shapes and greatest redirections
Design and Analysis of Combined Extrusion Forging Die Behavior Under Thermal Structural Loads
No full textWe all know extrusion and forging are two different processes of manufacturing but in recent past researches combined these two process to reduce the production time, production cost etc.Combined extrusion-forging processes are now getting importance for its abilities to give improved material properties, high production rate and less material waste when compared with that produced by machining, casting or by assembling the individual parts produced by different manufacturing processes. In its simplest form of combined extrusion forging process, a billet is forged by punch and dies with punch/die or both containing an opening for extrusion. This tooling arrangement permits the simultaneous lateral spread due to forging, and backward/forward extrusion or both forward and backward extrusion simultaneously through the die/punch opening(s). In this study we are going to develop a die for extrusion-forging using knowledge from previous journals and books, we will develop a die for a flange with pipe using CAD and CAE packages. A basic die is designed and tested at maximum working conditions under thermal structural loads in simulation software ANSYS and the design of the die is further improvised to minimize the stress and improve life based on safety factor issues
Finite Element Simulation and Experimental Investigation of Friction Stir Welding of AA2219 and AA2014
No full textIn FSW, a rotating cylindrical pin tool is forced to plunge in to the plates to be welded and moved along their contact line. The tool penetrates into the work pieces. During this operation, frictional heat that is generated by contact friction between the tool and workpiece. The plasticized material is stirred by the tool and forced to “flow “ to the side and the back of the tool as the tool advantages as the temperature cools down, a solid continuous joint between the two plates is than formed. In this project work, DEFORM -3D is used to perform the finite element analysis and experimental investigation on the FSW in order to predict residual stresses, temperatures, normal stresses and distortion of the welded structures, that are induced during FSW of the given airframe structures made up of AA 2219 and AA 2014. A new technique of filling friction stir welding (FFSW) relying on a semi consumable joining tool has been developed to repair the keyhole left at the end of friction stir welding (FSW) seam. The FFSW process is able to repair the keyhole with both metallurgical and mechanical bonding characteristics and the FSW seam can be achieved without keyhole and other defects
