Dr Rachayya R Arakerimath
@jspmrscoe.edu.in
Professor and Head-Mechanical Engineering
JSPM's Rajrshi college of Engineering, Pune, India.
EDUCATION
BE-Automobile Engg, ME, PhD-Mechanical Engg
RESEARCH INTERESTS
Automotive System & Heat recovery, Product Design using CAD/CAM/CAE, Advanced Manufacturing Systems, Industry 4.0
Scopus Publications
Scopus Publications
Vilas Umbare and Rachayya Arakerimath
IOP Publishing
Abstract In present study, six samples of ICORENE 1613 LLDPE fuel tank with homogeneous composition were analysed for six different PIAT values of 165 °C, 170 °C, 180 °C, 190 °C, 195 °C and 200 °C in the first stage. In the second phase of the study, the samples with optimum PIAT values were considered for the Tensile and Flexural strength study at different temperatures. Peak Internal Air Temperature (PIAT) values were obtained using the rotolog instrument, while the tensile and flexural tests were performed utilizing the Universal Testing Machine for accurate characterization of the material properties. The tensile and flexural strength were carried out at three different operating temperatures considering the tank will be subjected to variable operating conditions in real world exercise. The maximum value for both all the process parameters studied were observed at PIAT value of 195 °C, the same has been chosen for the further investigation. The failure data obtained from these two destructive testing will be helpful to mitigate the defects during the process. The tensile test results indicate that the LLDPE sample exhibits the maximum tensile strength of 17.3 MPa at 23 °C and the highest elongation percentage at failure, which is 182.7% at 80 °C. Moreover, the sample shows a remarkable flexural strength of 75.97 MPa at 23 °C, which is indicative of its superior ability to resist deformation under applied bending stresses.
Anuja H. Karle, Namdev Ashok Patil, and Rachayya Arakerimath
Springer Nature Singapore
Govind Waghmare and Rachayya Rudramuni Arakerimath
Emerald
PurposeThis study aims to identify the significant factors of the multi-dimpling process, determine the most influential parameters of multi-dimpling to increase the dimple sheet strength and make a low-cost model of the multi-dimpling for sheet metal industries. To create an empirical expression linking process performance to different input factors, the percentage contribution of these elements is also calculated.Design/methodology/approachTaguchi grey relational analysis is used to apply a new effective strategy to experimental data in order to optimize the dimpling process parameters while taking into account several performance factors and low-cost model. In addition, a statistical method called ANOVA is used to ensure that the results are adequate. The optimal process parameters that generate improved mechanical properties are determined via grey relational analysis (GRA). Every level of the process variables, a response table and a grey relational grade (GRG) has been established.FindingsThe factors created for experiment number 2 with 0.5 mm as the sheet thickness, 2 mm dimple diameter, 0.5 mm dimple depth, 8 mm dimples spacing and the material of SS 304 were allotted rank one, which belonged to the optimal parameter values giving the greatest value of GRG.Practical implicationsThe study demonstrates that the process parameters of any dimple sheet manufacturing industry can be optimized, and the effect of process parameters can be identified.Originality/valueThe proposed low-cost model is relatively economical and readily implementable to small- and large-scale industries using newly developed multi-dimpling multi-punch and die.
Prakash Shinde and R. R. Arakerimath
AIP Publishing
Vilas Umbare and Rachayya Arakerimath
Springer Science and Business Media LLC
Prakash Shinde and R. R. Arakerimath
AIP Publishing
Satish A. Patil and R. R. Arakerimath
AIP Publishing
Pankaj Kumar Jha and Rachayya Arakerimath
AIP Publishing
Sharad B. Masal and Dr.Rachayya. R Arakerimath
Pavankumar R. Sonawane, Deepak M. Deshmukh, Amar Gajbhiye, Krishan Pandey, Sunil A. More, and R. R. Arakerimath
Springer Science and Business Media LLC
Campli Srinidhi, Mayur Jawale, Vedant Utikar, Shraddha Jadhav, Madhusudhan Acharya, Rachayya Arakerimath, Jitendra A. Hole, and Shylesh V. Channapattana
Wiley
Gurunath Shinde and Rachayya Arakerimath
Association of Metallurgical Engineers of Serbia
This research work carried out friction stir welding (FSW) of dissimilar aluminum AA3003-H12 and copper C12200-H01, with wide application in the refrigeration and heat exchanger industry. The main aim of this study is to investigate the influence of process parameters, i.e. pin type (PT), weld speed (WS), rotational speed (RPM), and shoulder diameter (SD) on impact energy (IE) of Al-Cu welded joint. The experimental study used the full factorial method with mixed levels of process parameters. Analysis of Variance (ANOVA) determines the significance of process parameters on impact energy. The results of the analysis of variance (ANOVA) shows that rotational speed (RPM) is the most influential process parameter contributing to the impact energy (IE) of dissimilar Al-Cu weld joint. The response optimizer tool in Minitab 18 software gives optimum weld conditions of process parameters for better weld performance. The FSW experiment with a tapered pin, weld speed of 16 mm/min, rotational speed of 1120 rpm, and shoulder diameter of 22.5 mm obtained the maximum impact energy value of 6.5367 J. The fine-grain recrystallization formed intermetallic compounds in the stir zone (SZ). These intermetallic compounds give a maximum microhardness of 382.24 Hv (0.1). The microstructure analysis of the stir zone (SZ) shows an equiaxed grain structure on the Cu side, while the Al side shows a fine recrystallized grain structure.
Satish A. Patil and R. R. Arakerimath
AIP Publishing
Gurunath V Shinde and Rachayya R Arakerimath
SAGE Publications
In current research work, an attempt has been made to join dissimilar metals by employing friction stir welding (FSW), i.e., AA3003-H12 (aluminium alloy) and C12200-H01 (copper alloy). The experiments are designed as per full factorial design at different process parameters, namely tool pin profiles, rotational speed, welding speed, and shoulder diameter while the ultimate tensile strength (UTS), yield strength (YS), and percentage elongation (% E) are considered as a performance parameter. Moreover, a statistical tool, i.e., analysis of variance (ANOVA) is also utilized to check the adequacy of the results. It is observed that the higher UTS, % E and YS are obtained by employing a taper pin profile tool at a rotational speed of 1800 rpm, a welding speed of 16 mm/min, and a shoulder diameter of 22.5 mm. The ANOVA results showed that the rotational speed is the most significant factor for current research work. In addition, a scanning electron microscope is utilized for microstructural analysis of welded joints. It is witnessed that the minimum grain size, i.e., 4 microns, is obtained for highest strength specimen and the maximum grain size is obtained for the lowest strength specimen i.e., 31 microns. Besides this, the swirling of cu particle is also observed from advancing side (AS) to the retreating side (RS). Moreover, energy-dispersive X-ray spectroscopy (EDS) indicates the formation of intermetallic compounds i.e. Al2Cu, Al9Cu4 at nugget zone (NZ). The hardness is found to be higher at NZ due to the presence of Al-Cu intermetallic.
Satish A Patil, , Dr. Racyya. R. Arakerimath, and
Journal of Engineering Research
Biodiesel is obtained using the transesterification process from renewable oils obtained from vegetable and animal fats. The transesterification process is used to produce biodiesel from Karanja oil with heterogeneous catalyst Calcium Oxide (CaO). In this research work, the Taguchi method has used for the optimization of the transesterification process using five input parameters and five levels for the development of orthogonal arrays. Experiments have conducted as per the L25 orthogonal array developed by Taguchi and yields obtained have been noted. The results obtained by experimentation have been analyzed by Minitab software. The results from Minitab have compared with the results obtained using ANN script analytically as well as graphically. The maximum value of yield has 88% at optimum parametric value namely molar ratio 20% with the addition of 3% Calcium oxide catalyst at process temperature 65ºC for 60 minutes reaction time and agitation speed 600 rpm.
G.S. Waghmare and R.R. Arakerimath
Elsevier BV
Abstract In this paper, multipoint dimple sheet forming process parameters is investigated in terms of optimization using finite element technique and Taguchi method. Dimples are produced using punch and die press braking operation. Dimple sheet formed using roller is very complex due to nonlinear structure, costly and widely used in construction, in many industrial applications. In this work, Ansys simulation software is used for accurate and critical understanding effect of sheet thickness, diameter of dimple, depth of dimple and distance between dimples in dimple forming process. The major objective is to determine the effect of the process parameters to obtain the optimal multipoint forming design of the dimple sheet. The hemispheric punch chosen for dimple is based on commonly used for various dimple sheet applications. Process parameters are sheet thickness, diameter of dimple, depth of dimple and distance between dimples has been analyzed using Taguchi method. The material selected for this work is structural steel. The results obtained indicate that the parameter sheet thickness is the most effective one on forming force. Tensile test of optimal parameter, result predicts that the dimple sheet strength is greater than that of the plain sheet.
S. A. Patil and R. R. Arakerimath
Engineering, Technology & Applied Science Research
Biodiesel is a renewable, biodegradable, and efficient fuel that can be blended with petro-diesel in any proportion. The noise in the engine resulting from the combustion has a direct effect on the engine’s performance. Many studies have examined the engines’ vibration and noise when using diesel and biodiesel blends. This study examines the optimization of diesel blends, load, and compression ratio in the aspect of reducing noise on a Kirloskar single-cylinder diesel engine. Noise was measured at the engine and its exhaust on a computerized setup and for different loads. The experimental results showed that a blend with 15% biodiesel, at 7kg load, and 18 compression ratio produced the lowest noise. Moreover, the Taguchi method was utilized, and experimental results were validated by an ANN
Dipak Sudam Patil, Rachayya R. Arakerimath, and Pramod V. Walke
Emerald
Purpose This paper aims to present an experimental investigation and optimization of a low-temperature thermoelectric module to examine the influence of the main operating conditions. Design/methodology/approach In this work, a comparison was made by varying the various operating parameters such as heat source temperature, the flow rate of the cold fluid and the external load resistance. A Taguchi method was applied to optimize the parameters of the system. Three factors, including the external load resistance, mass flow rate of water (at the heat sink side) and heater temperature (at the heat source side) along with different levels were taken into account. Analysis of variance was used to determine the significance and percentage contribution of each parameter. Findings The experimental results show that the maximum power output 8.22W and the maximum conversion efficiency 1.11 per cent were obtained at the heater temperature of 240°C, the cold fluid mass flow rate of 0.017 kg/s, module temperature difference of 45°C and the load resistance of 5 O. It was observed that the optimum parameter levels for maximum power output determined as 5 O external load resistance, 0.17 kg/s mass flow rate of water and 240°C heater temperature (A1B3C3). It reflects that these parameters influence on the optimum conditions. The heater temperature is the most significant parameter on the power output of the thermoelectric module. Originality/value It is clear from the confirmation test that experimental values and the predicted values are in good agreement.
Dipak S. Patil, Rachayya R. Arakerimath, and Pramod V. Walke
Elsevier BV
Abstract Around 60–70% of the fuel energy in an internal combustion engine is lost as waste heat through engine exhaust and coolant. Hence, waste heat recovery techniques can be used to increase the efficiency of the engine. Thermoelectric systems are widely used for converting heat energy to electric energy. A considerable attention of researchers has been drawn by the thermoelectric generator, for the waste heat recovery from engine exhaust. The thermoelectric generator is one of the promising green energy source and the most desirable option to recover useful energy from engine exhaust. A high-efficiency heat exchanger, which is an integral part of the thermoelectric generator, is necessary to increase the amount of heat energy extracted from engine exhaust at the cost of acceptable pressure drop. The present work is a summary of thermoelectric materials, and heat exchanger studies on heat transfer rate, thermal uniformity, and pressure drop. The heat exchangers with different internal structures enhance heat transfer rate and thermal uniformity, which increase the power output and the conversion efficiency of the thermoelectric generator. The presence of flow-impeding inserts/internal structures results in an adverse increase in pressure drop and has a negative effect on the performance of waste heat source.
R. N. Yerrawar and R. R. Arakerimath
Praise Worthy Prize
Current automotive companies require improvement in ride comfort with an alternative to suspension system of spring and damper. A good suspension system development is a challenging task to enhance ride comfort and road holding which are conflicting with each other. These two characteristics compromise each other as human beings require a soft ride(comfort) as well as hard ride (good handling). As per literature survey it is observed that, in active and passive suspension system, there is always a compromise between ride comfort and road holding hence there is a scope of development in semi active suspension for ride comfort and road holding. This paper elaborates a methodology for semi active suspension system to achieve optimum value of Ride Comfort. The novelty of this work is that, by experimental work it is observed that the current is a significant parameter of semi active suspension by Grey Taguchi Method and it is validated by acheving rank second for current parameter. To implement semi active suspension system MR (Magneto Rheological) Damper is used. The current controller is developed to vary current from 0.1 to 1A. The relationship between the factors affecting a process and output of that process is determined by design of experiment (DOE) method. In this paper Taguchi Method of DOE is implemented for optimization of ride comfort. Using MINITAB software L8 orthogonal array formulated with the total number of 8 runs. The semi active suspension parameters selected for performance are sprung mass, spring stiffness and current with two levels of each parameter. A Quarter Car test rig equipped with NI 9234 data acquisition system is incorporated with provision of levels of each parameter. The experiment is performed and results are utilized to decide relating values in terms of signal-to-noise (S/N) ratio by selecting lower is better characteristics for each run. These results are further investigated to determine the effect of suspension parameter on ride comfort. With both Grey relational analysis and ANOVA, it is found that the current has a significant influence on suspension system. Moreover, the optimal current parameters setting for maximum ride comfort can be obtained.
R.N. Yerrawar and R.R. Arakerimath
IEEE
The semi-active suspension system utilizes a fluctuating damping power as a control force. The motivation behind this work is to examine research impact of Skyhook, Groundhook and Hybrid Control strategies of the semiactive suspension system through computer simulation of quarter-car model in MATLAB/SIMULINK (SIMSCAPE LIBRARY). The ride comfort and handling characteristics of suspension system were watched for different street profile and obstructions such as constant step input and road bump. The performance of passive suspension system model was contrasted with Skyhook, Groundhook and Hybrid controlled semiactive suspension system performance. It also states the various advantages of semi-active suspension system over the conventional suspension system. The observations and results, interpretations would be valuable for planning and designing control algorithm in development of control system.
G. S. Waghmare and R. R. Arakerimath
Praise Worthy Prize
Dimpled steel products are formed by dimpling process and cold rolling process. Nowadays, a wider use of dimpled products is seen due to increased strength and life of these products. In this study, dimple sheet analysis is done using the theoretical, experimental and software simulation. First, the single dimple is theoretically analyzed using Hertz contact theory and then compared to ANSYS results. A reference 3D Finite Element model of the single-step stamping is established, and the corresponding stress results are obtained. The Finite Element solutions are obtained for two materials stress values. Secondly, the multipoint analysis is done using ANSYS and by experiment. Then, a 3-point bending test is also carried out to check the stress and deflection values for different materials. The result shows that the strength of the dimple sheet is higher compared to the plain sheet due to the non-linear shape. Finally, all results are analyzed and compared in this paper.
R.N. Yerrawar and R.R. Arakerimath
Elsevier BV
Abstract Current automotive companies require improvement in ride comfort with an alternative to suspension system of spring and damper. Developing a good suspension system is a challenging task to enhance ride comfort and road holding which are conflicting with each other. Those two characteristics compromise each other as human beings require a soft ride(comfortable) as well as hard ride (good handling).As per past literature survey, it is observed that there is a scope of development in active and semi active suspension for safety and driving pleasure of occupant as well as to provide ride comfort and road holding of vehicle. These papers elaborate a methodology for semi active suspension system to achieve optimum value of Ride Comfort. To implement semi active suspension system MR (Magneto Rheological) Damper is used .The current controller is developed to vary current from 0.1A to 1A. Design of Experiment (DOE) is a systematic method to determine the relationship between factors affecting a process and output of that process. In this paper Taguchi Method of DOE is implemented for optimization of ride comfort. Using MINITAB software L8 orthogonal array formulated with the total number of 8 runs. The semi active suspension parameters selected for performance are Sprung mass, spring stiffness and current with two levels of each parameter. A Quarter Car test rig equipped with NI 9234 data acquisition system is incorporated with provision of levels of each parameter. These are performed and the effect of these parameters on ride comfort is investigated. Experimental results are used to determine corresponding values in terms of signal-to-noise (S/N) ratio for each run. S/N ratio with lower is better characteristics is selected. ANOVA is performed and mean of SN ratio for each parameter is plotted to investigate which suspension parameter contributes highly in the performance of Semi Active suspension system.
Publications
SCI/Scopus-22
WOS-02
UGC= 07
Total Papers=150
GRANT DETAILS
3-SPPU BCUD Pune
RESEARCH OUTPUTS (PATENTS, SOFTWARE, PUBLICATIONS, PRODUCTS)
Advisory System for Biodiesel
Expert System for CNC Machining
INDUSTRY EXPERIENCE
1-Years