International Journal of Vehicle Structures and Systems https://www.i-scholar.in/index.php/IJVSS <p>International Journal of Vehicle Structures and Systems (IJVSS) is a quarterly journal and is published by MechAero Foundation for Technical Research &amp; Education Excellence (MAFTREE). MAFTREE is a Section 25 company limited by guarantee, based in Chennai, India and engaged in the promotion and advancement of technical education and research in the field of mechanical, aerospace and other branches of engineering. IJVSS will endeavour to publish <br />high quality original research and review papers, case studies, technical notes and book reviews. All published papers in this journal will have undergone rigorous peer review.</p> en-US vijay@mechaero.org (Dr. Vijay Sahadevan) office@mechaero.org (Mohammed Basheer, Project Engineer) Tue, 21 May 2019 00:00:00 +0000 OJS 2.4.2.0 http://blogs.law.harvard.edu/tech/rss 60 Multi Objective Optimization of Parameters of Torsional Vibration Dampers Considering Damping Effect and Light Weight Design https://www.i-scholar.in/index.php/IJVSS/article/view/185353 To reduce the torsional vibration of vehicle power transmission system (VPTS), a torsional vibration model with multiple degrees of freedom (MDOF) of VPTS was established. The scheme of equipping torsional vibration dampers (TVDs) on the drive shaft was employed by the calculation of the forced vibration and the free vibration of the VPTS. The energy method was used to optimize the parameters of single-stage, two-stage parallel, and two-stage series TVDs based on the principle that balances the damping effect and lightweight design. On the basis of this, the parameters of the models incorporating TVD and elastic couplings (ECs) were optimized. Results showed that the proposed method can ensure the damping effects of TVD and realize the lightweight. Can Yang, Xiaodong Tan, Lin Hua, Chihua Lu, Yongliang Wang, Sheng Wang https://www.i-scholar.in/index.php/IJVSS/article/view/185353 Tue, 21 May 2019 00:00:00 +0000 Detection and Tracking of Vehicles Based on Colour Probability Density https://www.i-scholar.in/index.php/IJVSS/article/view/185357 Vehicle monitoring is a very important part in the intelligent transportation systems towards real-time monitoring of intersection traffic condition, the dynamic traffic incident detection and traffic parameter extraction. This paper proposes a vehicle tracking method based on mean shift. During the detection period, tracking objects of vehicles are constructed. The current vehicle position is predicted from the target area of former frame. In the candidate area of the target image, foreground area mask is adopted as a condition whether a pixel is selected; this makes the colour probability density to more accurately reflect the characteristics of the vehicle, and avoids the background region's influence on the mean shift iterations. Experiments show that this method can effectively detect the position of the vehicle, and provides an effective vehicle tracking method in the intelligent transportation system. Xiaohua Shu, Yonghong Long, Xiyu Xiao, Pei Shu https://www.i-scholar.in/index.php/IJVSS/article/view/185357 Tue, 21 May 2019 00:00:00 +0000 Root Cause Analysis for Failure of Door Lock Case Assembly during Caulking Process https://www.i-scholar.in/index.php/IJVSS/article/view/185360 This paper details the failure analysis of deformed passenger car door lock case and presents a solution to avoid the part deformation during caulking process. This failure was observed during the assembly of case and its cover by caulking process. Mechanical properties and chemical composition of case (Zn Al4 material) has been checked by universal testing machine and spectra material analyser. The material composition having less aluminium content leads to the casting strength and cast ability losses. In order to get the exact load requirement for caulking process, analysis has been carried out by using finite element method. In finite element method, the case and case cover model has created by AUTODESK INVENTOR and stress analysis was carried using same software. The induced stress and deflection are obtained for various load conditions. The experimental measurement was taken from the machine by using load cells. By comparing the experimental data with FEM data we found that the problem happened due to the overload. From this result data the machine design was optimized by changing booster and cylinder which is used to generate the load. The hydro pneumatic circuit of the caulking machine has been optimized and redesigned to avoid future problems. S. P. Sundar Singh Sivam, K. Saravanan, Ganesh Babu Loganathan, D. Kumaran, S. Rajendra kumar https://www.i-scholar.in/index.php/IJVSS/article/view/185360 Tue, 21 May 2019 00:00:00 +0000 Study on Microstructural Characteristics and Mechanical Behaviour of AISI1050 Steel under Various Heat Treatments https://www.i-scholar.in/index.php/IJVSS/article/view/185365 Heat treatment of metal alloys is one of the most widely used techniques for achieving the desired mechanical properties by modifying the microstructure namely the grain and or by altering the second phases present in heat treat able alloys. At times heat treated materials undergo further process like forming, machining, welding etc. Thus the present work describes the effect of heat treatment of AISI 1050 steel and its associated micro structural changes that correlate it with the mechanical behaviour. AISI 1050 steel is widely used in the production of bearings, landing gear, actuators and aerospace structural components. In this study, different samples of AISI 1050 steel were heat treated to temperature above the austenitic region and were subjected to annealing or normalising, or spheroiding. It is indicative that the properties of the AISI 1050 steel can be easily altered by heat treatment to suit a particular application and for secondary processing. The property comparison includes micro structural grain size, yield strength, tensile strength, hardness and percentage elongation. Thus the results provide a better insight on the process of increasing the versatility of the AISI 1050 steel for its demanding use in aerospace structural applications and related mechanical processing. It was found that the effect of heat treatment has resulted in increased grain size, decreased strength and hardness, and improved properties which were more suitable for machining and forming process. S. P. Sundar Singh Sivam, Ganesh Babu Loganathan, V. G. Umasekar, K. Saravanan, P. S. Suresh Kumar, Saravanan Raja https://www.i-scholar.in/index.php/IJVSS/article/view/185365 Tue, 21 May 2019 00:00:00 +0000 Optimization of Passenger Car Door Impact Beam using Quasi Static CAE Analysis https://www.i-scholar.in/index.php/IJVSS/article/view/185367 Automotive side impacts are particularly dangerous as location of impact is very close to the passenger, who can be immediately reached by the impacting vehicle. FMVSS 214 static is a US safety regulation for occupant safety during side impacts, in which the vehicle is tested at static loading conditions to measure its load baring capacity and integrity of side closures. The CAE load case, virtually simulating the test, was handled as a quasi-static problem in this study. Impact beam is a component that helps in improving vehicle passive safety performance during side impacts by minimizing door intrusion to the occupant cabin. It plays an important role in achieving side impact regulatory norms. Through this study, a mass optimized front door impact beam design was developed for a passenger car with the help of CAE simulations; FMVSS 214S regulation norms are met. Component thickness, material and cross section shape were the design variables considered for the study. A methodology to perform the component level simulation of the impact beam loading such that it replicates component behaviour during full vehicle simulation was developed. This has helped in reducing the total problem calculation time in solver. This also has minimized the computational cost for the project. CAE simulations required for the study were done using LS-DYNA. ANSA and PRIMER were used as pre-processors and hyper-graph and meta-post were used for post processing. S. P. Sundar Singh Sivam, Ganesh Babu Loganathan, K. Saravanan, V. G. Umasekar, T. P. Mohammed Rameez https://www.i-scholar.in/index.php/IJVSS/article/view/185367 Tue, 21 May 2019 00:00:00 +0000 Analysis and Prediction of Performance of MR Damper at Different Currents and Control Strategies for Quarter Suspension System of a Roadway Vehicle https://www.i-scholar.in/index.php/IJVSS/article/view/185371 Ride comfort and vehicle handling are the two major issues to be dealt in the design of suspension systems of automobiles. With passive systems offering contrariety on these two parameters, the alternative systems are being in study. Magnetorheological (MR) damper, a most feasible semi-active device, is one such alternative, which will offer the advantage of dealing with both these issues overcoming contrariety. In this study, the suspension system of a car using MR damper is analysed at 5 different currents viz., 0A, 0.25A, 0.5A, 0.75A, 1A, using 2DOF quarter car model and 4DOF half car models for ride comfort and handling and the comparisons of these are done with same suspension system equipped with regular passive damper. A MR damper is built-up using MR fluid consisting of carbonyl iron powder and silicone oil added with additive. Further, the characteristic of this damper is established by conducting experiments, which in turn is used to identify the parameters of Spencer model for MR damper. Using Spencer model of MR damper, at 5 different currents, the quarter car and half car models of vehicle suspension system are simulated by implementing a semi-active suspension system for analysing the resulting displacement and acceleration in the car body. The ride comfort and vehicle handling performance of each specific vehicle model with passive suspension system are compared with corresponding skyhook, ground hook and hybrid based semi-active suspension systems. The simulation and analysis are carried out using Matlab/Simulink. D. V. A. Rama Sastry, K. V. Ramana, N. Mohan Rao https://www.i-scholar.in/index.php/IJVSS/article/view/185371 Tue, 21 May 2019 00:00:00 +0000 Prediction of Shielding Effectiveness of Cables used for Automobile Sector: Technical Note https://www.i-scholar.in/index.php/IJVSS/article/view/185374 The automotive industry is gearing for a drastic shift towards the electric vehicles and also leaping for the autonomous vehicles. The functional performance of such autonomous vehicles must be properly ensured. One such kind of disturbance to the proper functioning of the vehicle is Electromagnetic Interference due to presence of various electrical systems. The operating frequency range is increasing due to latest advancement in automobile industry. The future working frequency is going to be 74GHz which falls under extremely high frequency range. So it is inevitable to analyse the electromagnetic interference and emission caused by such futuristic models. The electromagnetic field effect is dependent on the shielding effectiveness. The Electromagnetic Shielding Effectiveness (EMSE) varies with numerous parameters like the type of material, shape of material, size of material etc. The work deals with the modelling of cable and study on shielding effectiveness of the cables used in automotive. The same has to be evaluated with standards test procedures and validated. S. Bhuvaneswari, S. Manivannan, P. Salil https://www.i-scholar.in/index.php/IJVSS/article/view/185374 Tue, 21 May 2019 00:00:00 +0000 Warranty Cost Estimation using K-Means Cluster Analysis for Automobile Industry:Technical Note https://www.i-scholar.in/index.php/IJVSS/article/view/185376 When a vehicle under warranty comes for service, the technician identifies the potential fault and the corresponding service is done. From the raw information of customer complaint, the complaint codes are identified and allocation of qualified technician involves considerable man hours and cost per hour for the technician to do the service. Around 1059 vehicles under warranty were studied starting from customer complaint to the study of warranty cost to the manufacturer. In this paper, initially, we present the results of classifying the complaint code master into several classes using K-means cluster analysis and subsequently cluster analysis for a specific component say, water pump assembly was carried out. Then, analysis of cost to the automobile manufacturer on warranty claims are also presented here. R. Srinivasan, S. Prasanna Devi, S. Manivannan, N. Ethiraj https://www.i-scholar.in/index.php/IJVSS/article/view/185376 Tue, 21 May 2019 00:00:00 +0000 Investigation of Flow Induced Structural and Acoustic Behaviour of a Flat Solar Panel Mounted on a Mini Bus Roof Top https://www.i-scholar.in/index.php/IJVSS/article/view/185380 External fitting of a flat solar panel on a vehicle at its roof top changes the aerodynamics of flow around it. A local variation of pressure and velocity parameters around the solar panel at increasing speed and yaw angle may lead to structural instability and acoustic performance deterioration of the vehicle. Present paper addresses this issue numerically using ANSYS Fluent software. The investigation consists of three steps - flow analysis, structural analysis and acoustic analysis which focus more on flat solar panel and its supporting pillars. The vehicle speed is varied up to 100 kmph and yaw angle varied from 0° to 18°. The flow analysis reports pressure and velocity distribution, Structural analysis shows the deformation and stresses induced in panel and supporting pillars and Acoustic analysis captures the change in overall sound pressure level (OASPL) at front and rear location of the vehicle. The result of investigation shows no significant effect of flow induced effect on solar panel structure. Change in OASPL at front and rear end is observed to be marginal only. Mohammad Rafiq B. Agrewale, R. S. Maurya https://www.i-scholar.in/index.php/IJVSS/article/view/185380 Tue, 21 May 2019 00:00:00 +0000 Multi Response Optimization of Setting Process Variables in Face Milling of ZE41 Magnesium Alloy using Ranking Algorithms and ANOVA https://www.i-scholar.in/index.php/IJVSS/article/view/185384 This study presents the optimization of machining parameters on ZE41 Mg alloy fabricated by gravity die casting and Technique for Order Preference by Similarity to Ideal Solution (TOPSIS). Focus on the optimization of machining parameters using the technique to get minimum surface roughness, cutting force, thermal stress, residual stress, chip thickness and maximum MRR. A number of machining experiments were conducted based on the L27 orthogonal array on computer numerical control vertical machining center. The experiments were performed on ZE41 using cutting tool of an ISO 460. 1-1140-034A0-XM GC3 of 20, 25 and 30mm diameter with cutting point 140 degrees, for different cutting conditions. TOPSIS and ANOVA were used to work out the fore most important parameters cutting speed, feed rate, depth of cut and tool diameter which affect the response. The expected values and measured values are fairly close. Finally, the study for optimizing machining process is surveyed and results show improvement in real experiments. S. P. Sundar Singh Sivam, V. G. Umasekar, Ganesh Babu Loganathan, D. Kumaran, K. Saravanan https://www.i-scholar.in/index.php/IJVSS/article/view/185384 Tue, 21 May 2019 00:00:00 +0000 Aerodynamics, Stability and Performance Characteristics of X-Tandem Aircrafts https://www.i-scholar.in/index.php/IJVSS/article/view/185389 This paper details design, analysis and validation of tandem aircraft with one wing swept forward and the other wing swept backwards. The design objective is to investigate the aerodynamic and stability characteristics of this configuration created with the motive of exploiting the manoeuvring and post stall characteristics of a forward swept wing along with the structural robustness and reliable performance of the conventional aft-swept wing. Parameters such as wing sweep, wing position, anhedral and dihedral were varied to develop a range of designs. This gave considerable information regarding the aerodynamic and stability characteristics which enabled a preliminary design of a military combat aircraft exploiting this configuration. All performance characteristics and parameters of the final design compared with current operational military aircraft give a favourable picture regarding the effectiveness of this design. Ishaan Prakash, Prithwish Mukherjee https://www.i-scholar.in/index.php/IJVSS/article/view/185389 Tue, 21 May 2019 00:00:00 +0000 Analysis of Vibration Characteristics of Transport Utility Vehicle by Finite Element Method https://www.i-scholar.in/index.php/IJVSS/article/view/185395 Present work deals with the design and analysis vibration characteristics for transport utility vehicle. The transport utility vehicle is designed using automotive industry standards. The dynamic behaviour of vehicle depends on the selection of overall dimensions, wheel base, track width, overall height and width that are decided using central motor vehicle rules. The selected dimensions for vertical and horizontal pillar members of the transport bus are modified to enhance the strength, stiffness and stability of the superstructure during travel. This increased stability enhances the ride comfort and passenger safety. Analysing the effect of utilizing manual meshing in complex areas of a transport utility vehicle for vibration analysis and passenger ride comfort has also been carried out. Modal analysis to evaluate the dynamic behaviour of transport utility vehicle model is also carried. Further with the use of finite element analysis deflection vehicle structure is evaluated. The outcomes from the analysis are compared with the behaviour of chassis mounted platform in dynamic conditions and are found in close correlation. The vehicle structure behaves as a single entity in dynamic situations, so surface model is prepared. Element selection for the finite element analysis is carried by considering plane stress condition. Two-dimensional quadrilateral shell elements are extensively used for meshing of the computer model of the vehicle structure. Complex areas in the optimised vehicle structure are meshed using relevant combination of quads and trias. The values of vector sum displacement and frequencies are found to be in good agreement with the experimental ones. Vikas Radhakrishna Deulgaonkar https://www.i-scholar.in/index.php/IJVSS/article/view/185395 Tue, 21 May 2019 00:00:00 +0000 Finite Element Analysis of Chassis Integrated Structure for Tractor Trolley in Agricultural Applications https://www.i-scholar.in/index.php/IJVSS/article/view/185398 This paper deals with the design evaluation of chassis integrated structure intended to carry tractor trolleys. This structure is either bolted along with tractor trailer chassis or attached to the trolley using special attachments. Such structure is located in between the trolley chassis and tractor trolley. The role of this structure is to provide a support to the trolley during transportation in agricultural terrains. This structure transmits and upholds the load variations during tractor travel in agricultural terrains. Present work deals with design evaluation of one such structure. In this work, the structure under consideration is designed to house and support one axle semi-trailer trolley. Locations of attachment of the structure to the chassis or trolley depend upon the weight and size restrictions mentioned in Indian Standards. Major design considerations for the structure include height of the semi-trailer trolley, nature of load or cargo placed inside the trolley, restrictions on axle load and tractor geometry parameters as departure angle and ground clearance. In order to evaluate structure characteristics of stress and deflection computer simulation is carried for the road-load conditions. Road profiles for structure simulation and analysis include typical Indian agricultural terrains comprising of black cotton soil and soil lumps Vikas Radhakrishna Deulgaonkar https://www.i-scholar.in/index.php/IJVSS/article/view/185398 Tue, 21 May 2019 00:00:00 +0000 Improvement of Poisson’s Ratio using Carbon Nanotubes Reinforcement for Laminated Sandwich Plate https://www.i-scholar.in/index.php/IJVSS/article/view/185401 The focus of this study is to improve the material properties like Poisson's ratio and flexural strength of a sandwich plate by adding carbon nanotubes. A comparative analysis is carried out between sandwich plate with and without addition of carbon nanotubes. Nastran / Patran are the main tools used for this analysis. The experimental work focuses on the behaviour of the sandwich plate while applying tensile and compressive loads. The reduction of displacement in orthogonal sides under compressive stress and tensile stress are observed for carbon nanotubes enriched sandwich plate. This is due to increased face sheet relative difference of lateral strain with longitudinal strain. It is also observed that the mechanical properties of carbon nanotubes enriched sandwich plate are enhanced in comparison to sandwich plate without carbon nanotubes. It is found that, for feasible applications, the sandwich plate enhanced with carbon nanotubes, possess greater face sheet relative difference of lateral strain with longitudinal strain. It is concluded that the Poisson’s ratio for the sandwich panel enriched with carbon nanotubes is advantageous than sandwich panel without carbon nanotubes. M. Senbagan, R. Sarathkumar, D. Dominic Xavier, S. Seralathan, V. Hariram https://www.i-scholar.in/index.php/IJVSS/article/view/185401 Tue, 21 May 2019 00:00:00 +0000 Experimental Investigation of Alumina Reinforced Copper Metal Matrix Composite by Stir Casting Method https://www.i-scholar.in/index.php/IJVSS/article/view/185403 In the present study, alumina reinforced copper metal matrix composites were prepared by stir casting method. Three different specimens were prepared by changing the weight ratio of alumina to copper. The samples were prepared by adding 10%, 20% and 30% alumina to copper matrix. The three specimens were subjected to mechanical, thermal and corrosion testing, in order to find out the properties of the material. Various mechanical tests like hardness, impact and corrosion were performed including thermal conductivity to understand the behaviour of the specimens under combined loads. Specimen number 2 which was 80%-20% copper to alumina was found to be the best combination for such type of applications. M. Palanivendhan, J. Chandradass, Ajith Rajendran, Nishanth M. Govindarajan, M. Adwait Krishnaa https://www.i-scholar.in/index.php/IJVSS/article/view/185403 Tue, 21 May 2019 00:00:00 +0000 Geometric Design Validation of Oxidation Catalysis System in Composite Regeneration Emission Control System https://www.i-scholar.in/index.php/IJVSS/article/view/185404 Development of emission control systems for reducing the toxicity levels of exhaust emissions is one of the major challenges faced by automotive industry which rely on diesel engines owing to its thermal efficiency and service life. The major challenge faced for implementation of emission control system is the periodic regeneration of channels in diesel particulate filter to avoid clogging and backpressure rise inside the substrate. Commercial fuel based regeneration is leading to uncontrolled combustion inside the filter substrate affecting its service life. State of art of the emission control system has been detailed by conducting literature survey on the area and it has been found that these systems have a vital role in reducing emission levels to meet emission norms. Microwave based active regeneration has been proposed in this paper to improve the service life and effectiveness of diesel particulate filter. Three dimensional models of the axial flow, radial flow and cylindrical oxidation catalysis system are developed using Computer Aided Design software and flow analysis has been conducted using Computational Fluid Dynamics software (ANSYS FLUENT). Validation of the geometric design is done using simulation results and the pressure drop across the system is found to be in acceptable range. Caneon Kurien, Ajay Kumar Srivastava, Deepak Kumar https://www.i-scholar.in/index.php/IJVSS/article/view/185404 Tue, 21 May 2019 00:00:00 +0000 Analysis of Synchronous Moment for Active Front Steering and a Two Actuated Wheels of Electric Vehicle Based on Dynamic Stability Enhancement https://www.i-scholar.in/index.php/IJVSS/article/view/185405 Active Front Steering (AFS) and Direct Yaw moment Controller (DYC) are the vehicle smart systems to improve the vehicle stability and safety. The AFS uses front wheels Steer-By-Wire (SBW) system. DYC uses Rear Independent in Wheel Actuated Electric Vehicles (RIWA-EVs). It generates yaw moment to correct the vehicle state deviations. The proposed controller algorithm consists of two levels. First level feedback controller evaluate the optimal yaw moment generated to achieve the desired vehicle trajectory motion with minimize the yaw rate and side-slip errors. The second level controller is utilized to allocate the required front steer angle and traction/ regeneration to the RIWA embedded in rear wheels by taking into account the tire slip. An optimal Linear Quadratic Regulator (LQR) controller is designed, and its controller effectiveness is evaluated under various input driving manoeuvres. The results indicate that the integrated AFS/DYC can significantly stabilize the vehicle motion and highly reduce the driver’s workload. The laboratory experiment of AFS subsystem, for adequate actual front steering angle is measured, in order to apply in vehicle model to predict the responses. The results disclose that the RMS can be an effective route to monitor the vehicle stability. Eid. S. Mohamed, Mh. I. Khalil, Ahmed A. A. Saad https://www.i-scholar.in/index.php/IJVSS/article/view/185405 Tue, 21 May 2019 00:00:00 +0000 Computational Analysis of Air Wings to Evaluate Downforce and Lift-Drag Ratio:Technical Note https://www.i-scholar.in/index.php/IJVSS/article/view/185406 Air wings with NACA air foil profiles are designed and analysed for their aerodynamics at 40m/s. More than one air profile has been analysed to find the suitable air wing meeting the requirement and efficiency. An air wing in an automobile experiences aerodynamic forces and act as an inverted air foil. The efficiency of an air wing can be determined by down force - drag ratio i.e., it has to produce more down force with least possible drag caused by its frontal area of cross section. N. Murugu Nachippan https://www.i-scholar.in/index.php/IJVSS/article/view/185406 Tue, 21 May 2019 00:00:00 +0000 Numerical Evaluation and Influence of Product Quality and its defects Measures on the drawing of Stainless Steel Cross Member for Automobiles https://www.i-scholar.in/index.php/IJVSS/article/view/185407 Industrial enterprises increasingly demand optimum quality of products keeping in consideration a strict adherence where forming parameters are concerned. As far as incorporating the vital forming process upon an assortment of materials is concerned, it has grown excruciatingly challenging for industrial enterprises for laying out the adequately precise and suitable parameters. The flaws that are engendered during the process of sheet metal forming are inevitable. Flaws of this nature can be, however, kept within minimal proportions by introducing variations into the process parameters by Trial and Error methodology. This evidently results in a subsequent financial loss, not to mention an irrevocable loss of time and material. Dynaform simulation of defects combined with optimization is carried out with the help of Minitab. This method, as can be conjectured with considerable ease, yields optimum results, for it replaces much to our convenience the need for specialist industrial expertise besides leading to considerable savings in cost, time and material. This study would optimize the SS304sheet metal forming parameters FLD, thickness and thinning with three input parameters, namely, the lower binder force, tool travel velocity and binder close velocity. S. P. Sundar Singh Sivam, Ganesh Babu Loganathan, K. Saravanan, V. G. Umasekar, S. Rajendrakumar https://www.i-scholar.in/index.php/IJVSS/article/view/185407 Tue, 21 May 2019 00:00:00 +0000 Analysis of Machining Parameters in Turning Operation on Duplex 2205 by using RSM for Vehicle Structure https://www.i-scholar.in/index.php/IJVSS/article/view/185408 Turning is the machining process carried out to make cylindrical parts. Since the process is economical and the flexibility of turning operation is high, the process has become highly versatile among the industrial scenario. The design of experiments concept along with response surface methodology is used to analyze the machining parameters such as spindle seed, feed rate and depth of cut, of the turning operation. Three levels of spindle speed, feed rate and depth of cut are used as input parameters and their corresponding responses such as material removal rate (M.R.R), surface roughness, feed force, thrust force and cutting force are considered as the output parameters. The main aim of this experimentation process is to identify the optimal process parameters to get high M R R and low surface roughness. During high spindle speed, the M R R is high and vice versa. Surface roughness is high when its corresponding spindle speed and depth of cut is high. A high spindle speed, the chip formation is continuous whereas in medium speed, discontinuous chip is formed. M.R.R is high when spindle speed, depth of cut and feed rate are high. V. Vijayan, B. Sureshkumar, G. Sathishkumar, R. Yokeshwaran https://www.i-scholar.in/index.php/IJVSS/article/view/185408 Tue, 21 May 2019 00:00:00 +0000 Mechanical and Tribological Behavior of Mg-Matrix Composites Manufactured by Stir Casting https://www.i-scholar.in/index.php/IJVSS/article/view/185409 In the recent decades, magnesium matrix composites present a plenty of applications to automotive, marine and aerospace industries. In this work, AZ31B is selected as Mg matrix material and hard Tungsten carbide (WC) particles as reinforcement material. Mg/WC composites reinforced with different weight proportions (0, 5, 10 and 15 wt.%) were made through stir casting method. The worn surface of manufactured Mg/WC composites and base Mg material were examined by scanning electron microscope (SEM). The wear test results denoted that the AZ31B/15 wt% WC composites have excellent tribological behaviour when compared to the base magnesium matrix AZ31B alloy. The yield strength, flexural strength, tensile strength and micro-hardness of the manufactured composites are improved by increasing the WC content. SEM images reveal the homogeneous distribution of WC particles throughout the Mg matrix. R. Praveenkumar, P. Periyasamy, V. Mohanavel, M. M. Ravikumar https://www.i-scholar.in/index.php/IJVSS/article/view/185409 Tue, 21 May 2019 00:00:00 +0000