bluuebunny/crossref_metadata_2025_split huggingface dataset:
Barium titanate particle filled silicone elastomer composite: Preparation and evaluation of morphology and mechanical behaviour
Authors: Kumar Ajeet , Ahmad Dilshad , Patra Karali 
Published: August 2019

Abstract
Barium titanate (BaTiO3) nano particles with different percentage by weight were added in silicone rubber as a filler to develop silicone elastomer composites. The morphology of the fractured surface of the prepared silicone elastomer composite film was investigated to see the distribution of BaTiO3 nano filler in the polymer matrix. The obtained results showed good distribution of BaTiO3 up to 10% by weight in silicon elastomer composite. Beyond this 10% weight percentage, agglomeration of BaTiO3 particles occurs. The mechanical characterizations of silicone elastomer composites with different weight % of BaTiO3 particles were performed through uniaxial tensile testing. Elastic modulus of composite increases when filler content increases up to 10%. However, further increase in the filler content results agglomeration of particles in the composite and decrease in elastic modulus of the silicone elastomer composite. The results show that the optimum value of filler content in the prepared composite is between 5% to 10%.
Numerical study on the thermal behavior of polymer nano-composites
Authors: Arora Gaurav , Pathak Himanshu 
Published: August 2019

Abstract
In this work, Mori-Tanaka (MT) scheme has been implemented to predict effective thermal properties of polymer nano-composites composed of high-density polyethylene (HDPE) and single-walled carbon nano-tubes (SWCNTs) as matrix and nano-fillers, respectively. The technique uses the fourth order tensor to effectively determine the thermal conductivities, specific heat and global density of the composites. Effect of constituent’s volume fraction and orientation have been investigated for effective thermal conductivities of composites. The composite fillers are numerically simulated as aligned, 2-D and 3-D random orientation in the polymer matrix. Numerical results show that in-plane and out-of-plane thermal conductivities have a linear relation with increasing volume fraction. The specific heat capacity of a composite decrease as the volume fraction of SWCNTs increases. The randomly distributed SWCNTs decreases the heat flux whereas the alignment of SWCNTs has shown a maximum heat flux.
Experimental analysis of WEDM machined surface of Inconel 825 using single objective PSO
Authors: Kumar P , Gupta M , Kumar V 
Published: August 2019

Abstract
The present research focuses on the analysis of surface topography of Inconel 825 superalloy, machined with Wire Electrical Discharge Machining. Surface texture analysis includes cracks, craters, pockmarks, heat affected zone and recast layer thickness. Particle swarm optimization used response surface methodology (RSM) to find the optimum combination of WEDM characteristics viz. pulse on time, pulse off time, gap voltage, peak current, wire tension and wire feed. Surface crack density (SCD) and recast layer thickness (RCLt) are the output responses. The results manifest that pulse on time, peak current and gap voltage are the most influential parameters for surface topography. At optimum combination of process parameters, the value obtained for SCD is 0.000423 μm/μm2 and RCLt is 8.044 μm. Under optimized conditions, surface topography of the machined specimen is improved that makes it suitable for implementation in industry.
Experimental modelling of powder metallurgical processed copper foams using acrawax as a space holder material
Authors: Sharma Mohit , Angra Surjit 
Published: August 2019

Abstract
Copper foams have various uses in applications such as electrode for fuel cells and batteries, filters for water purification, thermal conductivity enhancer for phase change materials, etc. This study shows the process of processing copper foams with an average pore size of 200-300 μm with 40 and 70 volume % porosity through a powder metallurgy route. Space holder technique has been employed to process the copper foams. A lubricant space holder material acrawax has been used which possesses superior properties compared to all the previously used space holders. Copper foam’s physical and mechanical properties have been studied with the change in compaction pressure. Simple mathematical models have also been developed in this work using 2N factorial method. The models can be used to get the values of pore size and porosity present in the foams according to the changing parameters like amount of space holder, compaction pressure, sintering time and temperature.
Three-Dimensional Unsteady Wake Characteristics of Rectangular Cylinder
Authors: Kumar Prashant , Tiwari Shaligram 
Published: August 2019

Abstract
Present study investigates three-dimensional flow field characteristics for flow past surface mounted finite height rectangular cylinder using Open Source Field Operation and Manipulation (OpenFOAM). Wake characteristics have been examined for different values of Reynolds number (Re) ranging from 140 to 200 and fixed height of the cylinder. Different values of side ratio (SR, ratio of longitudinal dimension to transverse dimension of the cylinder) have been considered varying from 0.5 to 3.0 for Re = 180. Effect of Re on unsteady wake flow has been presented using iso λ
2 -surfaces. Unsteady periodic oscillation and effects of Re and SR on wake transition have been illustrated using Hilbert spectra of the transverse velocity signals in the wake. Wake shedding frequency and its distribution in energy frequency domain have been presented and analysed using marginal and Fourier spectra. Comparison between the two spectra reveals that marginal spectra extract lowest frequency which is not captured by Fourier spectra. Extent of nonlinear fluctuations in the wake and its distribution with the associated frequency have been analysed and quantified in terms of degree of stationarity. Variation in mean drag coefficient with change in Re and SR has also been reported.
Household LPG Cylinder: Effects of different heads and Impact analysis using ANSYS
Authors: Mahraur Nikhil Kumar , Singh Nilamber Kumar 
Published: August 2019

Abstract
The aim of this paper is to study the behaviour of a gas-filled LPG (liquefied petroleum gas) cylinder having dissimilar heads (hemispherical, semi-ellipsoidal and tori-spherical) and its responses subjected to vertical (at the top) and horizontal (side) normal impacts by a solid spherical steel ball of mass 4 kg at different velocities 5, 25 and 50 m/sec using ANSYS. The technical specifications of the gas cylinder necessary for its design calculations are referred from Hindustan Petroleum Corporation Limited (HPCL). The conventional steel is considered as the material for both the cylinder and the impacting ball under the critical gas pressure of 2.5 MPa as per Indian standard, IS 6240. Effects of the critical gas pressure on the cylinders are studied based on the thickness as well as the strength for above heads. The simulated results of ANSYS have good agreement with the theoretical results.
Selection of optimum Cutting Parameters for Minimization of Specific Energy Consumption during Machining of Al 6061
Authors: Pawanr Shailendra , Garg Girish Kant 
Published: August 2019

Abstract
Manufacturing sector consumes a significant amount of energy globally. Machine tools are one of the major equipment in manufacturing sector and hence major consumer of energy. The electrical energy consumed by the machine tools results in emission of harmful gases and substantial stress on environmental. This work focuses on selection of optimum cutting parameters to minimize specific energy consumption (SEC) during turning of Al 6061 with tungsten carbide inserts in dry condition. Experiment are planned using L27 orthogonal array and Taguchi method is applied to determine optimum and most influencing cutting parameters for minimizing SEC. Results shows that feed is the dominating factor followed by cutting speed and depth of cut. The optimum value of feed (mm/rev), cutting speed (m/min) and depth of cut (mm) are found 0.12, 46.2 and 1.0 respectively. Further the energy consumption maps are developed to analyse the influence of cutting parameters on specific energy consumption. The developed energy consumption maps can be used for correlating the region of minimum SEC with selected cutting parameters.
Sensor fusion model for defect identification in friction stir welding process
Authors: Das Manabendra , Meena Ashish , Das Bipul 
Published: August 2019

Abstract
Defect identification in friction stir welding process is a challenging task as most of the defects formed at subsurface level. The available non destructive approaches are limited only to offline assessment of the defects. In automated environment defect identification methodologies with online monitoring possibilities are gaining significant attention. In this research work sensor fusion based model has been developed for identification of tunnel defect in friction stir welding samples. Real time signal information acquired from tool main spindle motor current signal, rotational speed and vertical force signal have been fused to estimate a quantitative indicator for defect detection within the welded samples. Real time signals are acquired using a force measurement system and a speed sensor with a sampling frequency of 10 kHz. Feature level fusion modeling is incorporated to develop a methodology for defect detection in friction stir welding process. The estimate can be used for identifying defective samples from defect free samples which is advantageous in automated production environment.
Comparative analysis of Silica-gel/Water and Zeolite/water Pair on adsorption Refrigeration System
Authors: Soni Palash , Gaba Vivek Kumar 
Published: August 2019

Abstract
The current work presents a comparative investigation on the execution of closed cycle adsorption refrigeration systems with Zeolite as adsorbent and water as adsorbet in one system and silica-gel as adsorbent and water as adsorbate in another system. In the present analysis, the effect of variation of the regeneration temperature on the coefficient of performance (COP) along with specific cooling power (SCP) for both the pairs has been studied and compared. From the analysis, it was found that specific cooling power (SCP) and coefficient of performance (COP) for Zeolite/water pair are better at a lower range of regeneration temperature while it is not that good for silica-gel/water pair. Both the pairs perform well at higher regeneration temperature. This being a theoretical study the results may vary practically.
Mathematical Modelling and Comparative Study of Elliptical and Circular Capacitive Pressure Microsensor
Authors: Mishra Rishabh Bhooshan , Santosh Kumar S. 
Published: August 2019

Abstract
A lot of work on clamped circular, square and rectangular shaped capacitive pressure sensor has been carried out. However, to the best of our knowledge, no elaborate work has been performed on mathematical formulation and simulation of clamped elliptical shaped capacitive pressure sensor in literature. This paper describes the mathematical modelling and simulation of normal mode clamped elliptical shaped capacitive pressure sensor. The study of various performance parameters like maximum diaphragm deflection, capacitance variation, mechanical sensitivity, capacitive sensitivity and non-linearity is also carried out for operating pressure range of 0kPa – 18 kPa. For circular capacitive pressure sensor, the operating pressure range is modified according to physical dimensions i.e. thickness and radius of diaphragm, separation gap between plates and maximum deflection. For same overlapping area between plates (10000π mm2), the comparison of elliptical shapes of different eccentricities with circular shape diaphragm is carried out. The thickness of diaphragm is taken as2 μm and separation gap is 1 μm in all the designs which are used in this work. In this comparative study, it is observed that elliptical shaped capacitive pressure sensors have better linearity than circular diaphragm pressure sensor.
Experimental investigation on performance and emission characteristics of single cylinder CI engine using waste cooking oil (WCO) with diethyl ether (DEE)
Authors: Jagotra A , Singh D K , Sandhu S S , Kango S , Bhadauria S S 
Published: August 2019

Abstract
The objective of this paper is to investigate the performance and emission characteristics of WCOME (waste cooking oil methyl ester) blended with DEE (diethyl ether). The present work deals with the utilization of waste cooking oil (WCO) as feedstock for biodiesel production via transesterification process by using an alkali catalyst (KOH – 1.5 wt. %) with alcohol (methanol) under molar ratio (1:6). The concluding properties of WCOME like viscosity, density, flash point and cv were fitured by ASTM/EN standard and were resulted to be equivalent to ASTM/EN standard for diesel. Various test fuels were prepared for the engine trials by blending 10%, 20% and 30% of WCO biodiesel in diesel on volumetric basis and cognominated as diesel-biodiesel blends (B10,B20&B30 respectively) and also added 5% DEE (as an additive) in same diesel-biodiesel blends on volumetric basis and designated as diesel-biodiesel-DEE blends (B10DEE5, B20DEE5 & B30DEE05 respectively). Among all the tested blends in this study, it was observed that addition of 20% WCO biodiesel (i.e. B20 & B20DEE5 blends) spectacle the best-improved results at the full load as compared to diesel fuel, with and without the addition of 5% DEE. For 20% biodiesel blends (i.e. B20 & B20DEE5 blends) at the full load, BTE was found to be increased by 3.50 % without DEE and 0.5 % with 5% DEE addition respectively, BSFC decreased by 20.83% & no change with 5% DEE, EGT decreased by 13.33% & 8.13% with 5% DEE, NOx decreased by 9.69% & 8.59% with 5% DEE, HC decreased by 27.59% but increased by 17.24% with 5% DEE, CO does not show any change at full load, SO decreased by 49.24% & 64.89% with 5% DEE & decreased by 98.04% using DPF with 5% DEE and the CO2 was increased by 1.89% & 3.77% with 5% DEE as compared to diesel fuel. Hence, 20% biodiesel blending shows the best performance and emissions results as compared to diesel fuel.
Optimizing pulsed fiber laser welding process parameters of thin Ti6Al4V sheet to control angular distortion
Authors: Maji Kuntal 
Published: August 2019

Abstract
The present study deals with angular distortions generated in fiber laser welding of Ti6Al4V sheets performed utilizing pulsed mode of laser irradiations. Experiments were conducted considering laser power, scan speed, pulse frequency and duty cycle as input process parameters, and angular distortion measured in terms of out of plane bending was taken as the process output. A central composite design was employed for carrying out pulsed laser welding experiments. The angular distortion was modelled using the response surface methodology for correlating with the input process parameters. Angular distortion was observed to increase with the laser power and scan speed. Optimum values of laser pulse frequency and duty cycle were found for obtaining least angular distortion. The prediction accuracy of the developed model of angular distortion was found to be good. Then, the desirability function approach of optimization technique was used to determine the optimum process parameters for obtaining the minimum distortion. Optimal distortion value was verified by conducting experiments and results were found satisfactory.
Effect of Mast Modification in Ingress Problem in Gas Turbine of Naval Ship
Authors: Yadav P S , Saxena V , Pali H S , Kumar N , Singh S N 
Published: August 2019

Abstract
Over the years, these funnels which were tallest structure on ships are no more the tallest structures and are now dominated by masts which have various electronics and antenna’s. This change has resulted in to smoke ingress problem. The gas turbine intake is located close to the funnels. The smoke entrapped in the wake of masts gets sucked in the intake of the turbine thereby raising the temperature at the intake resulting in lowering the efficiency of gas turbine. The flow and performance characteristics for a simplified model are carried out by providing opening in mast structure of different shapes to see the effect on smoke ingress problem.
Mechanical and wear properties of epoxy matrix composite reinforced with varying ratios of solid glass microspheres
Authors: Bhatia Sunny , Angra Surjit , Khan Sabah 
Published: August 2019

Abstract
This research work is carried out to study the mechanical and wear behaviour of inorganic particle filled polymers. Epoxy matrix filled with varying ratios of Solid glass microspheres (SGM) were fabricated using mechanical stirring process. The weight percentage of SGM were varied from 0 – 30, with a step size of 5wt%. Effect of weight percentage of SGM particles on bending strength, compression strength and compression modulus of the composites was evaluated. The Wear resistance of the composites against En-32 steel disk, was evaluated in terms of mass loss for various ratios of SGM using pin-on-disk test rig. Besides these, density of the composites was also evaluated. Mechanical and wear properties of the composites were improved by adding suitable percentage of the filler. Moreover density increased with the increase in percentage of SGM particles in the composites.
A Theoretical analysis on Electro Chemical Discharge Machining using Taguchi Method
Authors: Charak Abhishek , Jawalkar C S 
Published: August 2019

Abstract
The Electrochemical discharge machining (ECDM) is a growing machining process that develops from the processes like electrochemical machining (ECM) and electric discharge machining (EDM), used in micro machining of usually non-conductive materials such as quartz, glass, composites and ceramics. In recently time the need of non-conductive materials has been grown rapidly in the field of aerospace, medical, electrical and optical applications. Such as these applications implicate machining with higher reliability and higher accuracy, ECDM process has lavish scope in this area. Some further methods also that can machine non-conductive materials but they have certain limitations. In the current time ECDM is an emerging process, continuously researchers are trying to improve and amend it as a better way for non-conducting materials. Currently this paper carried out a study on continuous improvements in ECDM in machining of glass in the ECDM, has been show their effect on material removal (MR). A Taguchi analysis on machining of borosilicate glass has also been obtained, wherein it is illustrated that increase in feed rate and electrolyte concentration increases the MR.
Optimal location of cutout within a cross-ply laminated cantilever beam for maximum lateral buckling load
Authors: Choudhary Prashant Kumar , Mahato PK , Jana Prasun 
Published: August 2019

Abstract
This paper deals with the location optimization of a cutout within a laminated cantilever beam for maximizing the lateral buckling load. Various shapes of cutout, such as circular, elliptical, triangular, are generally used in structural components as a design requirement or sometime to reduce the overall weight of the structures. In this study, a laminated cantilever beam, with a single cutout, is considered. The beam is subjected to a concentrated load at the free end. The objective is to obtain the optimal location of the cutout which resist maximum lateral buckling load. For this an optimization routine has been used in which a finite element calculation of critical lateral buckling load in ANSYS is coupled with an in-built global optimization tool (Genetic Algorithm) in MATLAB. The optimal results are reported for various cases arising from change of geometry and material properties of the plate. It has been concluded that the position of cutout in the laminated beam plays a significant role while designing against lateral buckling load.
Assessment of desiccant assisted compression and absorption based air-conditioning systems for hot-dry and composite climates
Authors: Singh Gaurav , Das Ranjan 
Published: August 2019

Abstract
Air-conditioning inside residential and commercial buildings shows considerable amount of energy consumption among other energy consuming components. The present study is aimed at discussing the performance of desiccant integrated air-conditioning systems using solar energy and biomass resources through EnergyPlus simulations. Validations of the selected building and system are done with codes and standards available in the literature. Conventionally available high grade electricity is used as an auxiliary source. In this work, the study is carried out for hot-dry and composite climates using desiccant and indirect evaporative cooling assisted compression and absorption based air-conditioning systems. Performance parameters in terms of heat energy, electricity consumption and the coefficient of performance are studied. From the simulation results, it is envisaged that absorption-based air-conditioning system possesses more electricity saving potential than compression-based system for achieving the same thermal comfort condition. It is found that, as compared to compression-based system, 46.57% and 46.14% electricity savings can be acquired using absorption-based technology for hot-dry and composite climates, respectively.
Effect of thermal performance on melting and solidification of lauric acid PCM in cylindrical thermal energy storage
Authors: Yadav C , Sahoo R R 
Published: August 2019

Abstract
In this experimental study, a designed vertical shell and tube type thermal energy storage system, with the effect of natural convection during melting and solidification process is investigated. The temperature variation at different positions both in axial and radial locations are measured during melting and solidification process of lauric acid PCM. Results revealed that 0.4 kg of lauric acid PCM required the time of 4800 seconds for completion of the melting process (i.e., liquid fraction=1) within the predicted designed cylindrical thermal energy storage system. Fourier number, Rayleigh number, and Nussult number justified that natural convection occurs in the designed thermal energy storage system. Due to 7.91% increment in the thermal gradient, energy storage rate is greater 8.012% at axial height 0.0846m than the axial height 0.0423m. It also observed, after 4800 seconds heat transfer rate decreases gradually and within the time range of 4200-5400 seconds, it is decreased with 6.72%.
Modeling and simulation of rotary-rotary planer inverted pendulum
Authors: Gupta Neha , Dewan Lillie 
Published: August 2019

Abstract
There exist different mechanical structures of inverted pendulum system. This paper presents mathematical modeling of rotary-rotary-planer inverted pendulum system (R-R-P inverted pendulum system), which is a highly nonlinear unstable system. In this planer inverted pendulum configuration, the pendulum is attached to its rotary-rotary actuating base with a pin joint. This configuration of planer inverted pendulum is taken into account, as the configuration can best describe the balancing of broomstick in one’s hand, by considering the shoulder and elbow as revolute joints and such configuration will also help in the study of underactuated robotic systems. The dynamical equation of R-R-P inverted pendulum is derived by using Lagrangian equation of motion. To validate the mathematical model, simulation of nonlinear mathematical model of the system is performed via MATLAB Simulink.