bluuebunny/crossref_metadata_2025_split huggingface dataset:
Numerical analyses of turbulent flow behavior in plain journal bearing
Authors: Bendaoud Nadia , Kadda Mehala , Youcefi Abdelkader 
Published: February 2016

Purpose
– This paper aims to investigate the fluid flow regime and the elastic effect in a plain cylindrical journal bearing subjected to highly severe operating velocity to better predict the behavior of the bearing for the turbulent flow regime.

Design/methodology/approach
– A numerical analysis of the behavior of an elastohydrodynamic for cylindrical journal bearing finite dimension coated with antifriction material in turbulent regime, is implemented using the code-ANSYS CFX. This analysis is performed by solving the Navier–Stocks equations of continuity by the method of finite volume for rotational speeds ranging from 6,000 to 15,000 rpm, that is to say for different Reynolds number.

Findings
– This study aims to better predict the elastic behavior in a journal bearing subjected to severe operating conditions. The speed of rotation varies from 6,000 to 15,000 rpm.

Originality/value
– The results clearly show that significant pressures are applied in the extreme case of speed, that is to say to the turbulent regime. There is an emergence of new rupture zone pressure, we do not usually see the regime established; the level of the supply groove. Displacement of shaft relative to the bearing is remarkable by introducing the elastic effect and the turbulent regime.
Multi-objective optimization design of engine crankshaft bearing
Authors: Sun Jun , Shu Lei , Song Xianhao , Liu Guangsheng , Xu Feng , Miao Enming , Xu Zhihao , Zhang Zheng , Zhao Junwei 
Published: February 2016

Purpose
– This paper aims to use the crankshaft-bearing system of a four-cylinder internal combustion engine as the studying object, and develop a multi-objective optimization design of the crankshaft-bearing. In the current optimization design of engine crankshaft-bearing, only the crankshaft-bearing was considered as the studying object. However, the corresponding relations of major structure dimensions exist between the crankshaft and the crankshaft-bearing in internal combustion engine, and there are the interaction effects between the crankshaft and the crankshaft-bearing during the operation of internal combustion engine.

Design/methodology/approach
– The crankshaft mass and the total frictional power loss of crankshaft-bearing s are selected as the objective functions in the optimization design of crankshaft-bearing. The Particle Swarm Optimization algorithm based on the idea of decreasing strategy of inertia weight with the exponential type is used in the optimization calculation.

Findings
– The total frictional power loss of crankshaft-bearing and the crankshaft mass are decreased, respectively, by 26.2 and 5.3 per cent by the multi-objective optimization design of crankshaft-bearing, which are more reasonable than the ones of single-objective optimization design in which only the crankshaft-bearing is considered as the studying object.

Originality/value
– The crankshaft-bearing system of a four-cylinder internal combustion engine is taken as the studying object, and the multi-objective optimization design of crankshaft-bearing based on the crankshaft-bearing system is developed. The results of this paper are helpful to the design of the crankshaft-bearing for engine. There is universal significance to research the multi-objective optimization design of crankshaft-bearing based on the crankshaft-bearing system. The research method of the multi-objective optimization design of crankshaft-bearing based on the crankshaft-bearing system can be used to the optimization design of the bearing in the shaft-bearing system of ordinary machinery.
Effectiveness of multi-shape laser surface texturing in the reduction of friction under lubrication regime
Authors: Segu Dawit Zenebe , Hwang Pyung 
Published: February 2016

Purpose
– The purpose of this paper is to investigate and discuss the effect of multi-shape laser surface texturing (LST) steel surfaces on tribological performance.

Design/methodology/approach
– The textured surface with some specific formula arrays was fabricated by laser ablation process by combining patterns of circles and triangles, circles and squares and circles and ellipses. The tribological test was performed by a flat-on-flat tribometer under dry and lubrication conditions, and results were compared with that of untextured surface.

Findings
– The results showed that the textured surface had better friction coefficient performance than the untextured surface due to hydrodynamic lubrication effect. Through an increase in sliding speed, the beneficial effect of LST performance was achieved under dry and lubrication conditions.

Originality/value
– This paper develops multi-shape LST steel surfaces for improving the friction and wear performance under dry and lubrication conditions.
The effect of colemanite on the friction performance of automotive brake friction materials
Authors: Sugozu ilker , mutlu ibrahim , Sugozu Kezban Banu 
Published: February 2016

Purpose
– The purpose of this paper is to investigate use of colemanite (C) upon friction and wear performance of automotive brake lining. Brake lining production with the boron product colemanite addition and braking characterization investigated for development of non-asbestos organic (NAO) brake lining because of negative effects on human health and environmental hazard of asbestos containing linings. During the braking, brake lining is warmed up extremely due to friction, and the high temperature causes to decreasing of breaking performance. Colemanite has high melting temperature, and this makes this material valuable for brake lining.

Design/methodology/approach
– This study investigated the effect of colemanite (C) upon friction and wear performance of automotive brake lining. Based on a simple experimental formulation, different amounts of boron product colemanite were used and then evaluated using a friction assessment and screening test. In these specimens, half of the samples (shown with H indices) were heat treated in 4 h at 180°C temperature. Friction coefficient, wear rate and scanning electron microscope for friction surfaces were used to assess the performance of these samples.

Findings
– The results of test showed that colemanite can substantially improve properties of friction materials. The friction coefficient of friction materials modified with colemanite varies steadily with the change of temperature, and the wearing rate of friction materials is relatively low by using colemanite. Heat treatment-applied samples (CH) have provided a higher and stable friction coefficient. These results indicate that colemanite has ideal application effect in various friction materials.

Originality/value
– This paper fulfils an identified information and offers practical help to the industrial firms working with brake lining and also to the academicians working on wear of materials. Parallel results have been presented between previously reported and present study, in view of brake characteristics and wear resistance. Use of the lower cost and productive organic sources of material are the main improvement of the present study.
Hydrodynamic lubrication of partial textured sliding journal bearing based on three-dimensional CFD
Authors: Liang Xingxin , Liu Zhenglin , Wang Huanjie , Zhou Xuhui , Zhou Xincong 
Published: February 2016

Purpose
– The purpose of this study is to investigate the effects of partial texture location and dimple depth on load carrying capacity (LCC), friction coefficient and circumferential flow of journal bearing.

Design/methodology/approach
– Based on the Navier-Stokes equation, the methodology used computational fluid dynamics (CFD). A phase change boundary condition was applied on fluid domain, and the negative pressure at divergent region of oil film was considered.

Findings
– It has been found that texture located at lubricant inlet area can improve the performance of the bearing, and the effect of shallow dimples is superior to the deep ones. However, the bearing performance will be reduced due to the texture located at the maximum pressure area. When texture is located at the lubricant outlet area, there will be two different situations: the part of the texture located within the oil film divergent area can improve the LCC, while the part that is beyond the divergent region will make the LCC decrease.

Originality/value
– The lower-half oil film model was established only in this study to analyze the hydrodynamic lubrication performance of partial textured journal bearing, and the lower-half oil film was divided into three parts. A new cavitation algorithm was introduced to deal with the negative pressure. The formula for calculating the friction of liquid film is refined, including the consideration of vapor phase. The simulation results show that the location of partial texture have a great influence on the bearing performance.
Tribological behaviour of nitrided and nitrocarburized carbon steel used to produce engine parts
Authors: Brühl Sonia Patricia , Cabo Amado , Tuckart Walter , Prieto Germán 
Published: February 2016

Purpose– The purpose of this study is to select a proper surface treatment to enhance wear resistance of engine camshafts. The camshaft is a relevant part of a diesel engine which works under torsion, fatigue and wear efforts. They are usually manufactured by casting, forging or machining from forged bar of low alloy steels, and in most cases, the machined surfaces are quenched and tempered by induction heating. After that, in many cases, to withstand the efforts imposed on the active surfaces and improve tribology and fatigue properties, the industry used for decades, thermochemical technologies such as salt bath or gaseous nitriding and nitrocarburizing processes.Design/methodology/approach– This paper studied the effects of plasma nitriding and plasma nitrocarburizing, on the tribological behaviour of the steel SAE 1045HM3 proposed to produce camshafts. After the plasma treatments, the change in surface roughness was measured; the modified layers were studied by X-ray techniques and its thickness by optical microscopy. The diffusion zone was evaluated by Vickers microhardness determinations. Tribology tests were performed by pin-on-disc configuration using WC ball as a counterpart.Findings– Results show that plasma nitrided samples present the best tribological behaviour compared with the nitrocarburized ones; also, the influence of the roughness produced by the thermochemical processes appears to be important.Practical implications– Although both the plasma treatments have been applied for many years, and also reported separately in the scientific literature, there was no information comparing these two treatments for carbon steels, and also, there is not much about tribology in lubricated conditions of nitrided and nitrocarburized carbon steels. In fact, it is not proved that the porosity of the nitrocarburized layer is beneficial for wear resistance in lubricated conditions. In this paper, it was proved that at least in the tested conditions, it is not.Originality/value– Gas or plasma nitrocarburizing is usually recommended for this kind of applications, although the modified layer is porous. This paper attempts to prove that nitriding could be better than nitrocarburizing, even with a thinner white layer.
Towards minimizing wear by improving antiwear additives and surface characteristics using reduced phosphorus plain ZDDP oil under boundary lubrication
Authors: Nehme Gabi N , Ghalambor Saeed 
Published: February 2016

Purpose
– This study aims to examine the effect of the antiwear resistance of plain zinc-dialkyldithiophosphate (ZDDP) oil in the presence of Titanium-fluoride/iron-fluoride/polytetrafluoroethylene (TiF3/FeF3/PTFE) in the time to tribofilm breakdown and extent of wear under extreme boundary lubrication using a contact load of 317 Newton and a rotational speed of 700 rpm to simulate the cold start of a car engine. The mechanism of tribofilm formation and breakdown was followed carefully by monitoring the friction coefficient for different surface roughnesses over the duration of several reproducible tests that were performed in a ball on cylinder tribometer.

Design/methodology/approach
– The heating time of the cylinder dipped in the specified lubricant blend then set for one minute before testing and the break in period of 2 minutes to cool the contacting metal to metal surfaces during tribological testing played important roles in minimizing friction and wear, and are directly proportional to the durability and time for breakdown of the tribofilm. This article addresses the improvement of water drop contact angles for different surfaces during heat treatment and the tribological enhancement of antiwear additives when optimum concentration of fluorinated catalysts and PTFE is used in connection with reduced surface roughness and break in period.

Findings
– Design of Experiment software, scanning electron microscopy, energy dispersive spectroscopy and nanoindentation were used in this study to evaluate the antiwear resistance films when using 0.05 per cent phosphorus ZDDP plain oil with 0.5 weight per cent TiF3 + 0.5 weight per cent FeF3 + 2 weight per cent PTFE and when applying 2 minutes break in time to cool down the contacting bodies when temperature rises. Results indicated that the coated film on the thermally treated surfaces that is reflected as white patches on the SEM images is a function of the antiwear additives contribution; it is also shown to have positive influence on the friction and wear performances during tribological testing.

Originality/value
– This research involved the study of lubricant and surface interactions with antiwear additives under boundary lubrication and extreme pressure loading. Several researchers studied these effects and submitted articles to the journal. This is the first time that a break in period was used with surface conditions to simulate car stops in heavy traffic conditions.
Surface crack propagation and morphology in cutting tools
Authors: Linz Mathias , Walzhofer Franz , Krenn Stefan , Steiger-Thirsfeld Andreas , Bernardi Johannes , Winkelmann Horst , Badisch Ewald 
Published: February 2016

Purpose
– The purpose of this paper is to investigate the driving mechanisms for crack propagation regarding the related microstructures. Cracks in white etching layers have been found at the surface of submerged steel blades subjected to frictional sliding conditions.

Design/methodology/approach
– In-situ monitoring revealed a fluctuation between mixed lubrication and hydrodynamic lubrication conditions. One lamella including a crack tip was prepared for transmission electron microscopy (TEM) using focused ion beam milling. Transmission electron microscope analysis was performed with the aim to understand the characteristics of the crack propagation, especially considering the influence of the microstructural configuration (grain refinement, carbides, martensite and ferrite grains).

Findings
– The investigations have shown a grain-refined plastically deformed layer (friction martensite with grain sizes of
<
100 nm) which influences the propagation direction of cracks introduced at the frictionally stressed surface. Thereby, the crack propagation is dominantly parallel to the margin of the grain-refined martensitic layer at the surface and the base material. Cracks were split into side cracks what mostly appears at present carbides. In this case, the crack propagation might strike through the carbide or separate it from the matrix due to the mechanical misfit.

Originality/value
– For obtaining the results of this paper, a very special preparation of tribologically stressed samples was performed. Accordingly, specific findings of the crack propagation behavior under such conditions were achieved and are documented in the presented work. Moreover, the described crack propagation process is a combination of several mechanisms which occur in very limited region underneath the surface and are investigated by high-resolution TEM.
Short selling and the development of anti-shorting laws in the UK
Authors: Mohamad Azhar 
Published: February 2016

Purpose
– The aim of this paper is to provide a review of the literature on short selling. In particular, it seeks to describe the history of short selling and anti-shorting laws. With respect to short-selling regulation, the main emphasis will be placed on the UK FSA’s regulatory action.

Design/methodology/approach
– This paper reviews the history of short selling and the development of anti-shorting laws, particularly with regard to the UK market. It also analyses the distinct literature on short selling.

Findings
– The paper argues that the development of anti-shorting laws shows that regulators are instituting a policy unfavourable to short sellers. The opposers of short selling may be seen as lacking ideas and having the tendency to ban anything they do not like. Short sellers, on the other hand, may be seen as the elite bodyguards of the financial market whose job is to get rid of overvalued stocks, and ultimately keep the market safe and efficient. For this reason, short sellers deserve our praise and thanks, not our hatred and opprobrium.

Originality/value
– To the authors’ knowledge, this paper is the first to review the history of short selling and the development of anti-shorting laws, particularly with regard to the UK market.
Investment funds, shadow banking and systemic risk
Authors: Bengtsson Elias 
Published: February 2016

Purpose– This paper aims to consider the role of investment funds in the credit intermediation process and discuss various forms of systemic risk their involvement might give rise to. It concludes by drawing some conclusions on the policy challenges facing authorities charged with regulating shadow banking.Design/methodology/approach– The paper is based on findings from prior research and statistics.Findings– On a general level, the paper shows that even though traditional investment funds and hedge funds may be very different in terms of their investment strategies and business models, some of them share several commonalities from a systemic risk perspective. More specifically, it discusses how instability in the funding profile of investment funds may threaten their ability to substitute banks’ maturity and liquidity transformation; that their potential funding liquidity shortages, asset reallocations and leverage may contribute to procyclicality in credit and market runs on the systemic money and short-term credit markets; and that insufficient risk separation may elude managerial and supervisory oversight, and force banks to reduce or interrupt credit intermediation.Research limitations/implications– The paper points to the lack of timely and comprehensive data for uncovering the stages and entities involved in shadow banking. Without sufficient data, the task of policy bodies, regulators or macroprudential authorities to fully grasp shadow banking and its contribution to systemic risk is daunting.Originality/value– The paper represents (to the author’ knowledge) the first analysis of the role of investments in shadow banking.
Development of dietary fibre enriched chicken sausages by incorporating corn bran, dried apple pomace and dried tomato pomace
Authors: Yadav Sanjay , Malik Ashok , Pathera Ashok , Islam Rayees Ul , Sharma Diwakar 
Published: February 2016

Purpose
– The aim of this study was to develop dietary fibre-enriched chicken sausage by incorporating fibre from a by-product of corn milling, apple and tomato processing.

Design/methodology/approach
– Sausages were developed by replacing lean meat with corn bran (CB), dried apple pomace (DAP) and dried tomato pomace (DTP) each at 3, 6 and 9 per cent levels. Organoleptic, nutritional and physico-chemical quality attributes of treated sausages were evaluated. One product from each fibre source with very good organoleptic acceptability was selected to estimate total dietary fibre content and assess shelf life under refrigerated temperature.

Findings
– Organoleptic acceptability of 3 per cent fibre-incorporated sausages were comparable with control. Moisture content decreased significantly in all treated sausages, protein content decreased in CB- and DAP-treated sausages, while ash content increased significantly in DTP-treated sausages. Emulsion stability and cooking yield was significantly higher in 6 and 9 per cent treated sausages, while crude fibre content was significantly higher in all the treated sausages.

Practical implications
– Chicken sausages with very good acceptability, higher dietary fibre content and storability up to 15 days at refrigerated temperature were developed by incorporating CB at 3 per cent level and DAP and DTP each at the 6 per cent level.

Originality/value
– The research is of value to meat processors. By-products like corn bran, apple and tomato pomace which are of low value can be profitably utilized to develop fibre enriched chicken sausage. Developed products will also help in promoting the image of meat as a healthy food.
Development and characterization of essential oils incorporated carrageenan based edible film for packaging of chicken patties
Authors: Soni Arvind , Kandeepan G , Mendiratta S. K. , Shukla Vivek , Kumar Ashish 
Published: February 2016

Purpose
– The purpose of this paper was to develop an antimicrobial edible film coated with essential oils for packaging application with characterization of its physicochemical properties. Livestock products especially meat products need special packaging system for protection. The most well-known packaging materials are polyethylene or co-polymer-based materials which have led to serious ecological problems due to their non-biodegradability and non-renewable nature. There has been a growing interest for edible films in recent years trying to reduce the amount of wastes, capable of protecting the food once the primary packaging is open, and because of public concerns about environmental protection. Various kinds of antimicrobial substances can also be incorporated into edible films to improve their functionality, as these substances could limit or prevent microbial growth on food surface.

Design/methodology/approach
– Biopolymers such as carrageenan and carboxymethylcellulose and their various combinations were tried to develop an edible film. The levels of antimicrobial substances such as oregano and thyme essential oils were standardized on the basis of their minimal inhibitory concentration against Escherichia coli, Salmonella pullorum, Staphylococcus aureus and Listeria monocytogenes. Standardized edible film coated with standardized concentration of essential oil was examined for different physicochemical properties and compared with edible film without essential oil.

Findings
– In total, 1.5 per cent (w/v) solution of carrageenan was found best suited biopolymer for edible film formation on the basis of thickness, transparency and elongation ability. Combined concentration of oregano (0.02 per cent) and thyme (0.03 per cent) essential oils were found to be best suited for coating the edible film as antimicrobial application.

Research limitations/implications
– Future research may benefit from the present attempt in evaluating the potency of easily available agricultural by produces for preparation of economically viable edible film incorporated with various natural biopreservatives in combination for the enhancement of shelf life.

Originality/value
– Antimicrobial packaging for enhancing the quality and shelf life of stored meat products offers great scope for further research in this field. Moreover, the literature pertaining to the application of edible films containing biopreservative for chicken meat products is very limited.