bluuebunny/crossref_metadata_2025 huggingface dataset:
On the determination of the transfer coefficients in the heat and mass transfer equations, based on the Boltzmann equation
Authors: Anisimova I V , Ignat`ev A V , Zhukova O G
Published: November 2019

At present, as a rule, the determination of the transfer characteristics of viscosity, diffusion, heat conduction and other characteristics in macro-equations of aerohydromechanics is carried out experimentally or on the basis of the kinetic theory of gases - the Boltzmann equation. The right “collisional” part of the Boltzmann equation contains multiple improper integrals with an oscillating integrand function, the values of which are used in determining transfer coefficients. This article proposes numerical algorithms suitable for calculating integrals of this type. They are based on the use of the Gauss - Christoffel quadrature formula that applies orthogonal polynomials. The oscillation nature of the integrand requires control of the quadrature error. In this case, the split nodes of the integration interval are distributed on the basis of minimizing the error of approximation of the integrand by orthogonal polynomials. Such an approach, in contrast to others, allows determining the values of integrals with oscillating integrand functions more qualitatively and efficiently and does not contain an “iterative” procedure for increasing the split nodes of the integration segment to achieve a given accuracy. This article is devoted to the problem of constructing quadrature formulas for calculating improper integrals, which are used in determining the transfer coefficients, based on the Boltzmann equation.
The effect of density turbulent diffusion intensity on magnetohydrodynamic wave processes in a spherical layer of electrically conducting liquid
Authors: Peregudin S , Peregudina E , Kholodova S
Published: November 2019

The paper considers large-scale 3D wave motion of weakly compressible and perfectly conducting inhomogeneous inviscid liquid subject to a magnetic field and the Coriolis force, with due account the spherical topography of bounding surfaces. The results of the studies can be used in geophysics and astrophysics, and in particular, in the study of dynamical processes occurring in the Earth liquid core and in stellar interiors. Moreover, they can be also employed in evaluation of magnetohydrodynamic characteristics of a liquid medium and for estimation of the parameters of the wave disturbance in the electromagnetic field induced by the corresponding hydrodynamic excitement. In addition, the above results can be used in the study of magnetohydrodynamic processes in engineering devices and in the study of foreground energy materials.
Inner aerodynamics of the improved four-vortex furnace model
Authors: Alekseenko S V , Yu Shadrin E , Anufriev I S , Boyko E E , Mukhina M A
Published: November 2019

The internal aerodynamics of a perspective vortex furnace chamber of a pulverized coal boiler with a diagonal arrangement of burners is studied using the non-contact optical method of flow diagnostics: Particle Image Velocimetry - PIV. The results of PIV measurements, characterizing the complex spatial structure of a swirled flow in an isothermal laboratory model of the furnace device, are presented. The velocity distribution in the vortex chamber volume is obtained, and the flow structure in the form of four conjugate closed vortices with curved axes is visualized.
Ignition of granulated mixed fuel based on lignite and wood waste
Authors: Yankovsky S A , Cherednik I V , Kuznetsov G V
Published: November 2019

Analysis of utilization possibility of sawmill waste when burning pellets in a mixture with coal. Conditions and characteristics of pellets ignition of fuel mixtures based on coal dust and fine wood at various mass concentrations of the components have been experimentally determined. Fuel pellets were made by cold pressing on a hydraulic press. The experiments were carried out in a medium heated to high (from 600 ° C to 800 ° C) temperatures of still air. It was established that increase of wood component proportion in the fuel granule significantly reduces the values of ignition delay times of all studied mixtures based on brown coal of 3B grade. The limit of stable ignition of such fuels is 600 ° C. The obtained results reflect the possibility of using granules of mixed fuels based on crushed coal and wood in the case of fuel-bed combustion in coal-fired boilers, as well as hot water boilers.
Experimental investigation of the effect of volume concentration and average diameters of nanoparticles on the contact angle of wetting between nanofluids and different substrates
Authors: Lobasov A S , Minakov A V , Pryazhnikov M I
Published: November 2019

The influence of different volume concentrations and average diameters of Al2O3 nanoparticles on the contact angle of wetting between nanofluids and different substrates was experimentally investigated. The concentrations of aluminium oxide nanoparticles were varied from 0.0625 vol.% to 1 vol.%. The average diameters of aluminium oxide nanoparticles were varied from 43 nm to 150 nm. Andesite, diabase, gabbro-diabase and metabasalt were chosen as the substrates. The dependences of the value of the contact angle of wetting between nanofluids and different substrates were obtained as a result of the experiments. It was shown, that the contact angle of wetting nonlinearly depended on the nanoparticles volume concentration. In addition, it was found that the wetting angle also depends on the substrate material, on which the drop lies. It was also obtained that the contact angle of wetting between different substrates and nanofluids with average and huge nanoparticles (> 75 nm) increased 1.25-1.5 times even at the smallest concentration (0.0625 vol.%) and then achieved the plateau. In contrast, the contact angle of wetting between different substrates and nanofluids with small nanoparticles (< 50 nm) reached maximum at a concentration of 0.0625 vol.% and after that slowly decreased to the values lower than those for the pure water.
Peculiarities of the “brass” coating formation applied by gas-dynamic spraying
Authors: Arkhipov V E , Dmitriev V G , Moskvitin G V , Pugachev M S
Published: November 2019

A research of the “brass” type coating structure generation process, obtained by gas-dynamic spraying from a particulate mixture of copper, zinc and corundum. The formation mechanisms of the phase and chemical composition of the obtained coating are determined. During the coating formation, mass-transfer of zinc microvolumes by corundum particles occurs and their interstitial dissolution into copper particles, while diffusion processes occur by the motion of vacancies, of copper to zinc with the formation of intermetallic compounds.
The effect of metallization on the sorption properties of carbon textile Busofit
Authors: Borisov A M , Gorina V A , Ditileva A O , Kovalev I A , Korobeynikov E V , Sleptsov V V , Suminov I V , Cheblakova E G , Schur P A
Published: November 2019

The effect of a titanium coating on the sorption properties of carbon textile Busofit was studied. The BET specific surface area was about ·103 m2/g before and after metallization of the fiber. The micropore volume in samples accounted for most of the total pore volume.
Optical properties of fluorocarbon coatings obtained by ion-plasma method at atmospheric pressure in dynamic mode of deposition
Authors: Elinson V M , Shvedov A V , Kukushkin D Yu
Published: November 2019

This paper presents the results of a study of the formation of fluorocarbon coatings obtained by using a low-frequency plasmatron of a low-temperature atmospheric pressure plasma in a dynamic mode of deposition. The main dependences of chemical vapor deposition (CVD) are investigated. The absorption spectra in the UV range was studied, and the band gap was determined by the Tauc method.
Influence of rare earth metals on the properties of modern titanium alloys
Authors: Grushin I A , Knyazev M I
Published: November 2019

To rare earth metals (REM) or lanthanides are related 14 chemical elements following in the periodic system of D. I. Mendeleev after lanthanum. Most often they are obtained by processing ore, which contains minerals in the form of a mixture of oxides, phosphates, carbonates or silicates of rare earth metals, as well as close to them in properties thorium, yttrium, scandium, titanium, niobium and tantalum.
Effect of ion irradiation on low-cycle fatigue of pressed profiles of the V95 alloy after artificial aging
Authors: Gushchina N V , Ovchinnikov V V , Makhin’ko F F , Vichuzhanin D I
Published: November 2019

The effect of 20–40-keV Ar+ ion irradiation on the fatigue resistance of hot-pressed V95 alloy (Al–Zn–Mg–Cu system) profiles 6 mm thick after quenching and artificial aging (140°С, 16 h) has been investigated. The use of the irradiation conditions (E = 40 keV, j = 500 µA/cm2), under which the profiles were briefly heated to a temperature of 200°C, is found to reduce the strength properties of the alloy significantly, which does not meet the specified requirements. Irradiation conditions, which enable one to avoid significant heating of a target at E = 20 keV and j = 400 µA/cm2, do not affect the fatigue resistance significantly at all fluences of F = 1·1015, 1·1016, 1·1017 cm−2.
Some features of anodic plasma electrolytic processes in aqueous solution
Authors: Kusmanov S A , Tambovskiy I V , Kusmanova I A , Belkin P N
Published: November 2019

Effect of the electrolyte temperature on the current-voltage and temperature-voltage characteristics of the anodc plasma electrolytic treatment of a steel sample, as well as the features of the formation of a stable vapour-gaseous envelope were considered. Spectral analysis revealed the glow of the heated anode zone without lines of elements of electrolyte and electrode. The result of the influence of the plasma electrolytic treatment mode on the surface condition was shown.
Research of the dielectric properties of polyethyleneterephthalate modified by fluorocarbon films formed by ion-plasma technology methods
Authors: Kuzkin V I , Elinson V M , Obrezkov O I , Yakushkin Yu Ya
Published: November 2019

The paper presents the results of a study of polyethyleneterephthalate (PET), modified by nanostructured fluorocarbon films formed by vapor deposition in a vacuum using a two-component gas mixture containing a film coating component (C6H12) and an etching component (CF4). The dependence of the dielectric loss tangent and permittivity on the ratio of the components of the gas mixture is established. The obtained data were correlated with the physicochemical characteristics of the materials used.
The influence of anodic oxidation on NiTi/Ti6Al4V fretting corrosion behavior
Authors: Lukina E A
Published: November 2019

This work is aimed to evaluate the efficiency of creating of barrier insulating oxide layers using anodic oxidation at low (U = 50V) and high (U = 200V) voltages to prevent fretting corrosion damage of NiTi rods fixed in Ti6Al4V titanium pedicle screws. It has been revealed that the formation of nonporous amorphous oxide layer on the surface of titanium screws by low voltage anodic oxidation prevents NiTi rods damage under fretting corrosion conditions. On the other hand, the presence of porous oxide layer on Ti6Al4V surface that is created by high voltage anodic oxidation deteriorates corrosion resistance of NiTi significantly.
The effect of tungsten carbide nanoparticles added to electrolyte on the composition and properties of oxide layers formed by plasma electrolytic oxidation on pre-eutectic silumin
Authors: Polunin A V , Borgardt E D , Shafeev M R , Krishtal M M
Published: November 2019

The effect of a low concentration (500 mg/L) additive of tungsten carbide (WC) nanoparticles (NPs) with a dispersion of 50–80 nm in an electrolyte on the structure, composition, and properties of oxide layers formed by plasma electrolytic oxidation (PEO) on 357.0 aluminum-silicon alloy (7.5 wt.% Si) was investigated. The oxide layers were studied by scanning electron microscopy (SEM), energy dispersive X-ray spectral microanalysis (EDXMA), X-ray diffraction analysis (XRD), and instrumental indentation. The thickness, roughness, microhardness, and wear resistance of the oxide layers were determined. It was found that the addition of WC nanoparticles at a concentration of 500 mg/L into the base electrolyte leads to an increase in the average thickness of the layer from 73 μm to 92 μm. It was found that the average microhardness was increased from 882 MPa to 1307 MPa, and the average wear was decreased from 592·10−9 g/(N·m) to 81·10−9 g/(N·m).
Influence of laser shock processing technology on a fatigue life of stainless steel specimen
Authors: Sakhvadze G G , Pugachev M S , Sakhvadze G Zh
Published: November 2019

The influence of laser shock processing technology on the fatigue life of 03Kh22N6M2 stainless steel has been investigated. The values of residual stresses in the test material were measured by using calculation methods and comparative curves of fatigue life were constructed. The high-efficiency of the examined technology’s application to increase the fatigue life of stainless steel was revealed.
Structure and properties of ceramic-like coating on zirconium alloy produced by microarc oxidation in electrolyte with submicron yttria powder additives
Authors: Sivtsova G V , Savushkina S V , Ashmarin A A , Suminov I V , Vinogradov A V
Published: November 2019

Ceramic-like coatings were formed on zirconium-niobium (Nb – 1%) alloy by microarc oxidation (MAO) in slurry electrolyte with the addition of submicron yttria powder. The coatings were investigated using scanning electron microscopy, x-ray diffraction analysis, microhardness tester and roughness meter. The addition of submicron yttria powder in electrolyte leads to content reduction of zirconia monoclinic phase in MAO coating. The inhibition effect increases with the MAO coating thickness rise and with an increase of the process current density up to 30 A/dm2.
Statistical control algorithm for the process of rapid solidification rate of the melt
Authors: Vasiliev V A , Odinokov S A
Published: November 2019

To improve the efficiency and quality of the process of rapid solidification rate of the melt, it is necessary to improve its controllability. This can be done using a set of statistical methods. It is proposed to use the algorithm for consistent application of statistical methods and improve product quality. It enables data collection, processing and analysis, including process stability analysis, process capability analysis, trend analysis and evaluation of relationships between parameters. The algorithm can be used to fulfill requirements in a quality management system.
The influence of technological parameters on the bead geometry in the manufacture of parts by laser metal deposition
Authors: Zavalov Y N , Dubrov A V , Ivanov I M , Dubrov V D
Published: November 2019

The dependences of geometric characteristics of single tracks obtained by laser deposition of austenitic steel powder on the shift of the laser beam focus and the distance from the nozzle to the substrate at different values of mass flow and scanning speed are investigated. It is shown that the characteristic value of the track height decreases from 900 to 700 microns with a decrease in the beam size by half at a powder flow rate of 8.4 g/min and a speed of 350 mm/min, decreases from 1100 to 900 microns at a flow rate of 15.6 g/min, and increases by 30-50% with an increase in flow rate by 2.3 times. The ratio of height to width (shape factor) decreases with the growth of the scanning speed from about 0.7 to 0.4 at a flow rate of 15.6 g/min and to 0.25 at a flow rate of 8.5 g/min. Process performance scaling parameters are defined. The results obtained make it possible to optimize the technological parameters of the laser metal deposition process.
Impact of ENSO on dependence between extreme rainfall and storm surge
Authors: Wu Wenyan , Leonard Michael
Published: November 2019

Dependence between extreme rainfall and storm surge can have significant implications for coastal floods, which are often caused by joint occurrence of these flood drivers (through pluvial or fluvial processes). The effect of multiple drivers leading to a compound flood event poses higher risk than those caused by a single flood-driving process. There is strong evidence that compound floods caused by joint occurrence of extreme storm surge and heavy rainfall are related to meteorological forcing (e.g. large scale pressure systems and wind) and climate phenomena (e.g. the El Niño Southern Oscillation or ENSO). Therefore, understanding how climate phenomena affect the co-occurrence of coastal flood drivers is an important step towards understanding future coastal flood risk under climate change. Here we examine the impact of one of the most important climate phenomena—ENSO—on dependence between storm surge and rainfall in Australia, using both observed surge and modelled surge from a linked ocean-climate model—the Regional Ocean Modeling System. Our results show that ENSO has a significant impact on the dependence between extreme rainfall and storm surge, thus flood risk resulted from these drivers. The overall dependence is largely driven by La Niña in Australia, with increased dependence observed during La Niña along most of the Australian coastline. However, there can be increased dependence during El Niño in some locations. The results demonstrate dependence is contributed by unequally-weighted mechanisms due to the interaction between climate phenomena and local features, indicating the need for greater understanding of composition of compound flood risk. Where climate phenomena are anticipated to change into the future, it is possible to use integrated process-driven models to establish a better understanding of whether extremes are more likely to co-occur and exacerbate compound flood risk.
Coherent signature of warming-induced extreme sub-continental boreal wildfire activity 4800 and 1100 years BP
Authors: Girardin Martin P , Portier Jeanne , Remy Cécile C , Ali Adam A , Paillard Jordan , Blarquez Olivier , Asselin Hugo , Gauthier Sylvie , Grondin Pierre , Bergeron Yves
Published: November 2019

Climate changes are expected to progressively increase extreme wildfire frequency in forests. Finding past analogs for periods of extreme biomass burning would provide valuable insights regarding what the effects of warming might be for tree species distribution, ecosystem integrity, atmospheric greenhouse gas balance, and human safety. Here, we used a network of 42 lake-sediment charcoal records across a ∼2000 km transect in eastern boreal North America to infer widespread periods of wildfire activity in association with past climate conditions. The reconstructed fluctuations in biomass burning are broadly consistent with variations in ethane concentration in Greenland polar ice cores. Biomass burning fluctuations also significantly co-varied with Greenland temperatures estimated from ice cores, at least for the past 6000 years. Our retrospective analysis of past fire activity allowed us to identify two fire periods centered around 4800 and 1100 BP, coinciding with large-scale warming in northern latitudes and having respectively affected an estimated ∼71% and ∼57% of the study area. These two periods co-occurred with widespread decreases in mean fire-return intervals. The two periods are likely the best analogs for what could be anticipated in terms of impacts of fire on ecosystem services provided by these forests in coming decades.
State-level drivers of future fine particulate matter mortality in the United States
Authors: Ou Yang , Smith Steven J , West J Jason , Nolte Christopher G , Loughlin Daniel H
Published: November 2019

Future fine particulate matter (PM2.5) concentrations and resulting health impacts will be largely determined by factors such as energy use, fuel choices, emission controls, state and national policies, and demographics. In this study, a human-earth system model is used to estimate PM2.5 mortality costs (PMMC) due to air pollutant emissions from each US state over the period 2015 to 2050, considering current major air quality and energy regulations. Contributions of various socioeconomic and energy factors to PMMC are quantified using the Logarithmic Mean Divisia Index. National PMMC are estimated to decrease 25% from 2015 to 2050, driven by decreases in energy intensity and PMMC per unit consumption of electric sector coal and transportation liquids. These factors together contribute 68% of the decrease, primarily from technology improvements and air quality regulations. States with greater population and economic growth, but with fewer clean energy resources, are more likely to face significant challenges in reducing future PMMC from their emissions. In contrast, states with larger projected decreases in PMMC have smaller increases in population and per capita GDP, and greater decreases in electric sector coal share and PMMC per unit fuel consumption.
Parametric Optimization of Electroless Ni-P coatings using Taguchi method
Authors: Sarkar Subhasish , Kumar Baranwal Rishav , Subhra Sen Rajat , Oraon Buddhadeb , Mukherjee Siddhartha , Majumdar Gautam
Published: November 2019

The present work deals with surface roughness characteristics of electroless Ni-P coatings. The optimised process parameters have been determined based on L27 Taguchi Orthogonal array. Bath concentration of nickel sulphate, concentration of sodium hypophosphite and temperature of bath has been considered as variable in this study. The optimum combinations of process parameters and surface roughness have been considered as response variable of the study. It has been found that 24 g/L of Nickel Sulfate, 25 g/L of Sodium Hypophosphite and 80°C temperature gives the minimum surface roughness of the Ni-P coated sample which was 0.23µm. Characterisation of the substrate and the as deposited samples were done by scanning electron microscope (SEM) and optical microscopy for surface morphology, energy-dispersive X- ray analysis (EDAX) for element analysis and X-ray diffraction for phase analysis.
Design and Fabrication of Human-Electric Hybrid Power Tri-Cycle
Authors: Prakash Srivastava Jay , Joshi Dheeraj , Vivek L. , Sai Manish G. , Sravan G. , Enosh K. , Naresh Naik E. , Vamshi Krishna K. , Prem M. , Dayanand K.
Published: November 2019

“EFFI-CYCLE” derived from Efficient-Cycle promotes reducing dependency on fossil fuels for domestic transport application. The objective of this paper is to conceive, design and fabricate a three-wheel configuration (tad-pole design) vehicle powered by human-electric hybrid power and capable of seating two passengers catering to the day to day mobility needs. PTC Creo 3.0 software is used for geometric modelling of the vehicle’s frame. To ensure the safety of the design the model is then imported into ANSYS V16.2 for impact analyses. Results in terms of deformation, strain and von Mises stresses are plotted. After successfully completing the design and simulation of the frame and other components it is then fabricated in the college’s (S R Engineering College, Warangal) workshop.
Microstructure and Mechanical Behaviour of ABOw Reinforced Aluminium Matrix Composite Synthesized by Powder Metallurgy route
Authors: Pandey Neeraj , Chakrabarty I , Ram S C , Majhi M R
Published: November 2019

In present study, the effect of Aluminum borate whiskers (ABOw) content (5, 10 and15 wt.%) on the development of Al-ABOw composite using powder metallurgy route has been investigated. Firstly, Aluminum borate whiskers (ABOw) were produced using sol-gel method. The commercial pure aluminum powder was used as matrix material in this investigation. Amongst, the various casting technology, the powder metallurgy route is most economical and extensively used by researchers. The microstructures of composites were observed using optical microscopy (OM), scanning electron microscopy (SEM). Transmission electron microscopy (TEM) analysis was performed for the observation of ABOw powder morphologies. The XRD analysis was carried out to confirm the phases and peak intensity of developed alloy and composites. The sintering was carried out at 600°C for all samples. After that, the bending test was carried out to calculate flexural strength of alloy and composites. The flexural strength 172±5 MPa was obtained maxima in composite with 10 wt.% ABOw along with improved hardness around 40.2HV. The result shows that, the composite exhibited better interfacial bonds, uniformity in microstructure and optimum flexural strength.
Study on Microstructure and Tribological Properties of Plasma Processed LM6 Alloy
Authors: Parida J , Mishra S C , Pattnaik S C
Published: November 2019

In the research work, LM6 alloy prepared by plasma processed technique is studied for wear behavior. The wear behavior of the plasma processed LM6 alloy sample is study at room conditions at four different loads,i.e. 10N, 20N, 30N, 40N and with different sliding speeds, i.e. 200, 300, 400, 600 rpm’s for about 2 min,5 min,10min,15 min respectively, using a pin-on-disk wear testing instrument. From the pin-on-disk experiment, cumulative mass loss varying with the sliding speed, applied load and time was studied. The existence of eutectic silicon is sensed by the microstructure. The wear of plasma processed LM6 alloy sample increased as applied load, sliding speed and time increased.
Characterization of raw and alkali treated prosopis juliflora fibers for potential polymer composite reinforcement
Authors: Madhu P. , Pradeep S. , Sanjay M. R. , Siengchin Suchart
Published: November 2019

The present world scenario owes for the need of materials which posses more ecological and biodegradable characteristics as well as capable of substituting man-made materials which resulted in the rapid increasing use of natural fibers. In the present investigation, the physico-chemical, thermal, tensile and morphological properties of Prosopis juliflora fibers (PJFs) are presented. Alkali treatment of PJFs was carried out at 2%, 4%, 6% and 8% (w/v) concentrations for a period of 45 min. 6% (w/v) treated PJFs results showed optimal results. These optimally treated fibers showed higher cellulose (74.42 wt. %), lower hemicellulose (2.21 wt. %), lignin (9.11 wt. %), higher crystallinity index (56.64%), crystallite size (15.76 nm), tensile strength (650 ± 6.43 MPa) and better thermal stability.
Probabilistic aspects of fatigue crack growth parameters under single overload in 6061-T6 aluminium alloys
Authors: Chandra Gope Prakash , Kabdwal Ankit
Published: November 2019

In the present investigation, several crack growth tests were performed on compact tension specimen under constant amplitude loading and single overload at an overload ratio of 1.8. The experimental data obtained were used to construct a-N, and da/dN vs ΔK curves and various fatigue crack growth parameters were determined and the variability associated with these parameters are addressed. Normal distribution, Weibull and extreme value distribution etc. were used to study the probabilistic nature of different crack growth parameters and best probabilistic distribution for each parameter are identified on the basis of statistical analysis. The probabilistic models of growth parameters are presented for the reliability assessment of a component under fatigue overload condition.
Experimental analysis of mechanical properties of stir casted aluminium-graphene nanocomposites
Authors: Shil Arnav , Roy Sandipan , Balaji P. S. , Kumar Katiyar Jitendra , Pramanik Sumit , Kumar Sharma Anuj
Published: November 2019

Aluminium (Al) based materials are widely used in aerospace and automobile industries due to its higher strength to weight ratio. Under fatigue loading the components are prone to failure, which is one of the key factors in designing the components. In the present study, Graphene (Gr) is added to Al at different weight percentages (1%, 2% and 3%) using stir casting. Tensile strength and fracture toughness of the composites were determined using tensile testing of Dogbone specimens and plane strain fracture toughness testing of C (T) speci-mens in mode-I, respectively. The result showed that for Al-Gr nanocomposites, with the increase in Graphene percentages, tensile strength was found to be in-creased however the fracture toughness was decreased. It is also found that the manufacturing method followed in the present work to be cost effective method for Al-Gr nano composite. The analysis of different tests suggests that the addition of 2wt% Graphene found to be the saturation point in the nanocomposites and any further addition of Graphene can lead to the degradation in the quality of composite.
A review on Manufacturing, Machining, and recycling of 3D printed composite materials.
Authors: Ujeniya P.S. , Rachchh N.V.
Published: November 2019

This paper includes a comprehensive review of the literature on the latest research and development in 3D printed composite materials and its behavior with several machining processes. Machining parameters need to be considered while performing an operation like drilling, turning, shaping, and surface finishing on 3D printed composite material for providing some useful new application with excellent benefits. Also, recycling of plastic waste which is the most challenging hurdle of society nowadays is discussed, and the scope of its real-life implementation is observed.
A State of the art on Sequential Micro-Machining
Authors: Tayade R M , Doloi B , Sarkar B R , Bhattacharyya B
Published: November 2019

The sequential micro-machining (SMM) is an emerging technique highly recommended for the manufacture of micro parts and also for generating micro features on parts. The review incorporates various traditional as well as non-traditional machining processes used in sequential manner. This paper focuses on recent trends in sequential micro machining combining diverse machining processes such as electrical discharge machining (EDM), laser beam machining (LBM), electrochemical machining (ECM), ultrasonic machining (USM), electrochemical discharge machining (ECDM), micro milling, micro grinding, electro-polishing, etc. The basic concepts, working principle, classification, mechanism of operation, the rationale behind the sequencing of individual machining processes etc. are described elaborately.
Evaluation of Performance and Emissions of Ceramic Coated Turbocharged Direct Injection Diesel Engine operated with Diesel and Biodiesel Blends
Authors: Rajendra Prasath B. , Devan P. K.
Published: November 2019

It is evident that the main derivatives of biodiesel obtained from the transesterification of vegetable oils are identified as a best suitable alternate fuel for conventional diesel fuel. However higher viscosity and poor volatility of biodiesel causes engine problems for long-term use in diesel engines. Preheating of biodiesel is one of the technique reducing the problems associated with the higher viscosity of biodiesel in diesel engines. The positive effect of increased operating temperature of ceramic-coated engine concept is incorporated to avoid the preheating and maximize the effective heat release of biodiesel. The combination of increased operating temperature associated with LHR engine and oxygenated nature of biodiesel ensure nearly complete combustion. The experiment was conducted on a four cylinder four stroke direct injection turbocharged diesel engine and the combustion chamber was coated with partially stabilized zirconia (PSZ) of 0.35 mm thickness over 0.15 mm thickness of NiCrAl bond coat. The performance and emissions of conventional turbocharged engine and ceramic coated turbocharged engine were analyzed using diesel and biodiesel blends.
Passive Constrained Layer Damping: A State of the Art Review
Authors: Kumar Ambesh , Behera Ranjan K.
Published: November 2019

In this paper authors discuss the advancements made over years in the passive constrained layer damping (PCLD) technique used for structural vibration control. To start with, the paper presents a brief literature survey on passive damping techniques using viscoelastic materials (VEM) emphasizing unconstrained layer damping (UCLD) followed by PCLD. The discussion on PCLD technique includes different mathematical models and experimental investigations related to it. Finally, the various design modifications proposed by the different researchers in order to improve the performance of conventional PCLD configuration in presented.
Pitting and Electrochemical corrosion behaviour of 316L austenitic stainless steel subjected to warm deformation
Authors: Kumar Viranshu , Kumar Gupta Ratnesh , Das Ghanshyam
Published: November 2019

Electrochemical and pitting corrosion behaviour of undeformed, deformed and annealed after deformation of the 316L stainless steel have been investigated by using electrochemical corrosion test methods. The results indicated that pitting occurred in undeformed sample, while the small pits were observed in deformed and annealed sample after immersion test in 10% FeCl3 solution. Microstructural characterization of undeformed, deformed and corroded sample were analysed by optical microscope and SEM. A Potentiodynamic polarization test in PWR environment was performed to evaluate the electrochemical behaviour of samples after deformation and heat treatment. The results showed that the corrosion rate decrease after heat treatment of deformed samples because heat treatment after deformation form a more protective oxide film on the surface of samples as compared to oxide film form on the surface of undeformed sample. The Ecorr shifted toward the passive direction with increase in annealing temperature after deformation. The shift of Ecorr towards the passive direction indicates a more protective passive film formed on the surface of heat treated samples after deformation.
Tribological Characteristics of Epoxide based Bio lubricant – commercial gear oil blends
Authors: Jagadhi Priyadharshan SP , Srinivas V , Rama Rao Chebattina Kodanda , Vandana V , varaaha subrahamanyam Pentakota
Published: November 2019

This study investigates the effect of epoxide based bio-lubricant derived from Calophyllum Inophyllum blended in commercial gear oil. The tribological properties of the blends are investigated on a four-ball wear tester. The base lubricant used is EP-140 gear oil and study is carried out by blends in 5%, 10%, 15%, 20% volume percentages of Calophyllum Inophyllum oil. Both wear test and friction test were carried out as per ASTM standards for various blends and the results were studied. The experimental results show that the base oil wear scar diameter increased with an increase in load and reduced by the addition of Calophyllum Inophyllum concentrations. The frictional torque is analyzed and the coefficient of friction is calculated. The results shows that 15% of bio-oil concentration is relatively more efficient compared to the other three. Despite a fall in seizure load, the overall results reveal that the addition of 15% Calophyllum Inophyllum to EP-140 gear oil performs better thereby improving anti-wear characteristics of the commercially available lubricants.
An Experimental Investigation of surface roughness of FDM Build parts by Chemical Misting
Authors: Mishra S.B. , Acharya Eeshan , Banerjee Dipabrata , Khan M.S.
Published: November 2019

Rapid Prototyping or additive manufacturing is a process of creating 3 dimensional objects by adding materials layer by layer. It is a modern manufacturing process of producing more complex shaped materials which might be difficult or impossible in traditional machining processes. This technique has application in all fields of life and many tools artefacts circuit boards etc. have been produced by this process. It also produces new bones to be replaced by older ones. In this treatise an experiment has been conducted to determine the surface roughness before and after chemical treatment thereby comparing both values. Design of Experiments was conducted in Minitab by Taguchi analysis and six parameters, three-part building parameters Raster Angle, Raster Width, Air Gap, and three-part smoothing parameters Temperature, Time, Cycle have been found out. Analysis of Variance (ANOVA)has been carried out to determine the relationship of each parameter along with regression equation. Also surface plots have been drawn to examine the effect of parameters on surface roughness.
Effect of cenosphere filler on the hardness and impact strength of wild cane fibre mat reinforced laminated composites
Authors: Sahu Pruthwiraj , Kumar Parida Sambit
Published: November 2019

This study deals with the development of laminated composites consisting of epoxy resin and cellulosic wild cane fibre (Arundo Donax L.) woven mat (cross-ply), and the effect of cenosphere filler on the microhardness and impact strength. Cenosphere used as a filler material, produced during burning of coal in thermal power plants. The conventional hand lay-up practice is applied to prepare different composite samples with varying weight percentage of filler content. The wild cane fibre is treated with alkali (5% NaOH) to improve its surface properties. It is observed that, mechanical properties, such as microhardness and impact strength are significantly influenced by incorporation of this waste-based ceramic filler for treated fibre composite samples. The laminated composites developed from this fibre mats can have potential application in automobile interiors and lightly loaded structural applications.
Investigations on the effect of electrode gap variation over pulse-electrodeposition profile
Authors: Jyoti Biswal Hrudaya , Vundavilli Pandu R , Gupta Ankur
Published: November 2019

The influence of gap between the cathode and anode over electrodeposition profile was investigated using both the experimental and simulation techniques. Experiments were performed through deposition of copper on stainless steel substrates while varying the electrode distance with a constant applied voltage. Pulse current waveform with 70% duty cycle was applied for better uniform deposition. Complementary 3D model was developed to simulate the effect of electrode distance on current density distribution and thickness of deposition with COMSOL Multiphysics 5.3a. For the chosen experimental conditions, an optimum inter-electrode distance of 60 mm was identified for maximum deposition and good surface morphology. In spite of the application of pulsed current waveform, some amount of non-uniformity was encountered due to edge effect. Inter-electrode gap was demonstrated to be an important factor influencing the deposition profile by correlating experiments with simulation.
Study of controlling parameters during electro-discharge machining of titanium alloy using grey relation analysis coupled with Taguchi philosophy
Authors: Debnath Biswajit , Banik Dipraj , Rahul  , Huang Hu , Routara B.C
Published: November 2019

Titanium grade 4 is a widely used material in the manufacturing industry due to its properties like high strength to weight ratio, low density, high-temperature resistivity, high corrosiveness. But due to its high strength, it is hard to machine in conventional machines. So here a different approach is shown to machine Titanium. Electro-discharge machine(EDM) is used for machining this metal. In this research work, an investigation is done to find the set of process parameters (peak current, gap voltage, pulse on time) for which responses like metal removal rate will be highest, but electrode wear rate and surface roughness is least. Optimization is done using Grey relation analysis coupled with Taguchi philosophy.
Smoothed Podgórski Strength Criterion
Authors: Szwed Aleksander , Kaminska Inez
Published: November 2019

A modification of the Podgórski limit state criterion is proposed in order to smoothen the plasticity surface allowing for application of the yield function in plastic evolution law. Convexity of the potential is discussed and calibration of five material parameters is carried out using common experimental tests, while two parameters remain arbitrary. Comparison of the model prediction with the available empirical data for concrete is presented and then recommendations are given in reference to the values of two arbitrary chosen parameters.
Influence of Imperfection on Buckling Resistance of Perforated Thin-Walled Bar with Very Low Slenderness – FEM Analysis and Comparison with Experimental Results
Authors: Piotrowski Andrzej
Published: November 2019

In this paper, the results of modelling of compression test for the perforated thin-walled bars of very low slenderness are shown and confronted with the experimental results. Three sets of imperfections as well as a model without imperfections were analysed and compared. Application of initial imperfections improved the results in most cases, but not always in the same extent, there were also some cases, where they worsened the compliance with experiment instead.
Calculation of the Rectangular Cross-Section Beams On the Side Buckling Taking into Account Creep
Authors: Zotov Ivan , Lapina Anastasia , Yazyev Batyr , Chepurnenko Anton
Published: November 2019

The article presents the derivation of the resolving equation for calculating the flat form of bending stability of the beams, taking into account creep. When deriving the basic equation, the application of the load with eccentricity, as well as the initial curvature of the beam is taken into account. The solution of the test problem for a wooden cantilever beam is presented. The value of the long-term critical load was introduced and it was shown that the load acting on the beam should not exceed it. A new criterion for determining the critical time is proposed.
Dynamic Axisymmetric Problem of Direct Piezoelectric Effect for A Bimorphic Plate of Stepwise Variable Thickness
Authors: Shlyahin Dmitrij Averkievich , Ratmanova Olesya Viktorovna
Published: November 2019

The dynamic axisymmetric problem of direct piezoelectric effect for a circular two-layer transducer consisting of a metal substrate and a piezoceramic plate of smaller diameter is considered. The oscillations of the electroelastic system are carried out due to the action of a mechanical load on its front surface, which is an arbitrary function of time and radial coordinate. The presented mathematical model of calculation allows to take into account the connectedness of longitudinal-transverse oscillations of a structure that is asymmetric in height. A new analytical solution was obtained in the framework of the refined theory of Timoshenko by the method of finite integral transformations. The calculated ratios make it possible to choose the geometric dimensions of the bimorphic plate, which most effectively allow to convert the mechanical load into the generated electrical pulse. The considered designs are widely used as touch switches that regulate the operation of valves for various purposes.
Controlling Production Activities Using Information Systems to Improve Cost Efficiency
Authors: Sidik R , Lestari V F , Winanti M B
Published: November 2019

The aim of this study is to control the production and reduce the company’s production costs at Rail and Query (RAQUER) by using information system implementation. This study found the problems that arise in production activities, causing leakage of high production costs in RAQUER. RAQUER is a medium-scale cottage industry engaged in the business of bag-making convection. This study was conducted by applying a qualitative descriptive approach and system development using a prototype model. System development included the identification of needs, data modeling, interface design, and application models. System testing was done to meet user needs that had been obtained from the identification of needs. The results achieved from this study are systems that able to control the production of bags at RAQUER so they can create production costs that are used more efficiently. If RAQUER is able to control its production process through this information system, cost efficiency can be achieved because there is no more random and useless production.
Website – Based on Vehicle Traffic Monitoring System
Authors: Kurniati P S , Puspitasari A
Published: November 2019

This research was conducted to provide suggestions how to monitor the road traffic conditions by using data sent from cameras installed at each intersection. Literature study, observation, system design and system testing used as a method in this research. With this method we can make an accurate information system regarding traffic monitoring. The results of this study is to obtained the data such as general conditions of the road, the number of vehicles passing, the average speed of the vehicle, the travel time of the vehicle, the position of congestion and the time of congestion. The creation of a monitoring system is very important because it can provide information about the road conditions clearly. From the current problems, the authors want to make a “Website-Based Vehicle Traffic Monitoring System” which later the system becomes information for road users and the police to monitor traffic.
Web-Based Business Opportunity
Authors: Adler J , Dewi S C
Published: November 2019

This research aims to see how the benefits will be generated by being a user in web-based opportunity (Youtube). This research used qualitative approache and descriptive method with analytical techniques as well as literature studies to explain the advantages from becoming a youtuber. The results of this study is becoming a YouTuber will gain a lot of advantages such as adsense payments, sponsorship, brand ambassadors and also corporate collaboration. A thousand of suscribers and viewers will gain opportunities from a company that interested in collaborating and adsense come. This research is expected to motivate millenials to see the business opportunies that can be gained by being a youtuber.
Information Technology for Accounting Application
Authors: Herlianti  , Tawami T
Published: November 2019

This study aims to determine the importance of accounting with accurate applications, namely as a tool to determine the policies of business people. The method used in writing scientific papers was also a descriptive qualitative method using data related to the topic. the results of this study find that all types of professions and fields which certainly have close relations with the world of accounting. With this application, we can exercise control or supervision related to company activities, including by making appropriate decisions from the application of this accounting. Accounting courses help in separating personal and business money. Have a clear payment system. From the results of the explanation above, it can be concluded that this accounting system will be able to assist businesses in determining the continuity of their business and suggest the application of accounting to help business success that is on the way because accounting has contributed greatly to advancing the company and easier by using an accurate application
Design of Information Systems Web-Based Car Parking Place Mall
Authors: Ali M H , Kurniawan D
Published: November 2019

The purpose of this research is to design a system that can help car owners to order parking spaces in malls online with web-based systems. The research method used was descriptive research method, to present a complete picture related to some of the variable situations examined. Data collection techniques use primary and secondary data and object-oriented system approaches, which support the design of web-based information systems. The results of this study can build software tailored to user needs, ease of use, and on time. This parking lot ticket booking website can simplify and simplify the selection of parking lots within the designated mall, allowing mall visitors to order online, and can reduce the number of people in getting a parking space at the mall.