bluuebunny/crossref_metadata_2025_split huggingface dataset:
Ensuring the required manufacturing quality of hydraulic-cylinder rods in mining machines
Authors: Sevagin S V , Mnatsakanyan V U 
Published: January 2020

Abstract
This article presents the results of experimental studies of the finishing treatment by hard turning of the chrome-plated surfaces of critical elements of hydraulic drives of mining machines and hydraulic distribution systems. It was revealed that in the process of galvanic chromium deposition on the working surfaces of the rod and other parts subject to intensive wear, along with provision of physicomechanical and operational characteristics of the surface layer, there is also formation of unacceptable macrogeometric deviations of the parts’ surfaces that are commensurable with the tolerance on the strengthened surface size. It is shown that the deviation from roundness (ovality) formed during chrome plating of the rod’s cylindrical surface is successfully eliminated by hard turning with the cutters equipped with cubic boron nitride plates. At the same time, along with ensuring the specified parameters of dimensional accuracy and geometric shape, the required roughness of the processed surfaces Ra is within 0.32 … 0.26 μm. Thus, the hard turning method can be reasonably recommended as an alternative to polishing, which is widely used after chrome plating of surfaces.The paper presents the methodology of the experiment, the geometrical parameters of cutting plates and technological processing modes, providing the required geometric accuracy and roughness of chrome-plated surfaces.
Automated technology of forming high-precision aspheric optics for multipurpose optical systems
Authors: Gorshkov V A , Nevrov A S , Smirnova A V 
Published: January 2020

Abstract
The report presents modern manufacturing technology of high-precision optical parts used in optical-electronic systems for various purposes. The report also presents the complex technology of automated shaping (TESAF) of aspherical, including off-axis surfaces of optical elements for optical-electronic systems. In this paper we consider various methods of forming optical parts with virtually any aspherization value and with different values of the off-axis parameter (off-axis aspheric), with the achievement of surface shape accuracy in the limit λ/60 ÷ λ/80 (λ = 0,6328 μm), by the criterion of the standard deviation. Optical systems manufactured by TESAF technology are already being successfully used at present.
Machinability Studies on Abrasive Water Jet Machining of Low Alloy Steel for Different Thickness
Authors: Adam Khan M , Gupta Kapil 
Published: January 2020

Abstract
This paper reports some results of experimental investigation conducted on abrasive water jet machining (AWJM) of medium carbon low alloy (EN24) steel. EN24 steel samples of different thickness have been machined at various combinations of AWJM parameters. Three important AWJM parameters namely water jet pressure, nozzle traverse speed, and stand-off distance have been varied at three levels each. Three important responses i.e. material removal rate, kerf wall inclination, and surface roughness (average roughness) have been considered as the machinability indicators. The variation of these machinability indicators with a range of thicknesses of EN24 steel samples has been investigated. It is found that AWJM is capable to machine EN24 steel at very high MRR even at the increased thickness. But, surface finish deterioration is prominent with sample having higher thickness. Moreover, nozzle traverse speed is identified as the most significant parameter. It is concluded that the jet pressure of 240MPa with traverse speed of 20mm/min can produce good machinability for AWJM of EN24 Steel.
On Productivity of Abrasive Water Jet Machining for Miniature Gear Manufacturing
Authors: Gupta Kapil 
Published: January 2020

Abstract
Quality, productivity, and sustainability are three major indicators to evaluate the performance of any manufacturing process. Abrasive water jet machining (AWJM), which is an advanced or nonconventional machining process possess numerous benefits over conventional and other advanced processes for manufacturing of precision engineering components. Material removal rate directly indicates about the process productivity, and often finds contradictory to quality and sustainability. This paper reports the productivity of AWJM process while manufacturing miniature gears of brass. It is a part of experimental investigation conducted to manufacture high quality miniature brass gears using AWJM process. Taguchi L9 orthogonal array based experimental study where a total of nine experiments with two replicates each was conducted to evaluate the effect of AWJM parameters on miniature gear quality, process productivity and sustainability. AWJM parameters were optimized to enhance material removal rate and an optimum value of 18.80 mm3/min was obtained. Furthermore, AWJM was identified as a superior to conventional machining processes for manufacturing of miniature gears.
Fuel protonation as extra way to improve diesel engine efficiency
Authors: Abdulgazis U A , Savchuk S I 
Published: January 2020

Abstract
This paper presents a method for low-cost protonation (hydrogenation) of diesel fuel. Protonation reduces the estimated fuel consumption to 3.3 g/kWh by intensifying the combustion of diesels, which reduces the external loss of energy due to exhaust gas, as well as the internal losses that occur in the gas-turbine supercharger.
Development of import replacement technology for gunpowder production
Authors: Livshits A B , Pelipenko D V , Staroverov V A , Matukhin E L 
Published: January 2020

Abstract
This article presented the results of the development of new grades of civil gunpowders, not previously produced at "KGTS», and the results of designing of new hunting and sports gunpowder for the shots of 12, 16, 20 shotgun caliber and for the hunting, sports and service rifles, that both presented at domestic and foreign production. Also, there are presented the results of a theoretical and methodological analysis of previous diversification and conversion, taking into account the need for a better solution of import issues and strategy of its implementation in the conditions of existence of external sanctions and restrictions. The market of foreign powders for small arms has been analyzed and foreign gunpowders have been investigated. The positive and negative aspects of the manufacturing technology of foreign powders and the physicochemical and ballistic characteristics of import powders are revealed. Currently relevant is the question of the transformation of the military-industrial complex in accordance with the needs of economic development and national defense of the country. An important emphasis is placed on solving the problems of import substitution and development of export-oriented technology, in particular powder production as a raw material for resourcing and expanding markets of final products sales.
Innovative modernization of production in the conditions of diversification and conversion
Authors: Livshits A B , Pelipenko D V , Yarullin R N , Matukhin E L , Staroverov A V 
Published: January 2020

Abstract
Currently, in the military and defense industries of many countries of the world, there is a tendency to improve the military-industrial potential on the basis of both the creation of fundamentally new special products and military technologies, as well as diversification and conversion of excess and outdated production lines. The situation in the field of armaments became fundamentally new - the lethal force of conventional weapons increased by five orders of magnitude from the beginning of the industrial revolution to the turn of the 21st century. The armed forces gained the opportunity to destroy humanity or to throw it back many centuries ago. As it is known, the beginning of the XXI century anticipates S. Huntington’s forecast that this century will determine the clash of civilizations in the battle for melting world resources, when some civilizations seek to take control of the resources of others, and others to defend their resources. In addition, it is necessary to take into account the latest developments in connection with the suspension and subsequent termination of the treaty signed in 1987 on intermediate and shorter-range missiles. This largely determines the relevance, severity, complexity and scale of the task of modernizing society, the economy and the machine-building complex of Russia.
Research and development of broaching methods on mandrel of large-sized pipe forgings
Authors: Kobelev O A , Albul S V , Kirillova N L 
Published: January 2020

Abstract
In modern day industry of heavy engineering, parts made from billets comprising large-sized pipe forgings are widely used. The paper presents results of the study of various methods of broaching on mandrel of large-sized pipe forgings and presents the results of industrial testing of the developed methods of broaching and designs of mandrels.
Improvement in Thermal Stability of Glass Fiber-reinforced Polyimide Honeycombs
Authors: Korneychuk A N , Bukharov S V , Ivanova S M , Shul G S 
Published: January 2020

Abstract
Results of researches of influence of 1,7-di(oxymethyl) - m-carborane on thermal stability polyimide binding the SP-97K brands are given in article. It is shown that introduction of bis-oxymethyls-carboranes allows to receive more heat-resistant high-coked compositions. The assumption is made that increase in thermal stability happens due to interaction of carborane fragments to oxygen of air and formation of compounds of B2O3 boron oxide.
The idea of complex multi-channel integrated automated system unification for testing structural elements of rocket and space technology made of composite materials into their development and manufacturing technological cycle
Authors: Kulkov A A , Lebedev K N 
Published: January 2020

Abstract
The concept of integration of an integrated multi-channel integrated automated system for testing elements of rocket-space technology made of composite materials into a single information space of the entire enterprise has been developed. When building the architecture of the automation system, the integration of the automated system of technological preparation of tests is provided. A unified mathematical model of the test object, test facility and loading systems, and the collection and pr+ocessing of test results was taken as the basis for modeling the technological process of testing.
Controller settings search area determination in the condition of reduced sensitivity to control object parameters drift
Authors: Livshits M Yu , Pilyugin I A , Ryazantsev P Yu 
Published: January 2020

Abstract
A definition method for the area of controller admissible parameters set-up in an aircraft, machine-building and other industries is offered in this article. Admissible adjustments areas of controller parameters are defined, at which closed control systems have smaller sensitivity to possible deviations of object parameters regulation during their operation. The examples of method applied to automatic control systems of vacuum in the furnace and drum-type boiler flow rate controller are considered.
The increasing of effectiveness of the reinforce holes method for fasteners with composite liners
Authors: Nasonov F A , Zinin A V , Morozov B B , Bukharov S V 
Published: January 2020

Abstract
The bearing capacity of a parts or units with a holes for fasteners and mechanical fasteners depends on the stress-strain state and its accompanying stress concentration in the local area of fasteners. In General, it is influenced by a set of operational and structural and technological factors. To replace the use of metal embedded elements, the technology of unloading the zone of point fastening of joints of composite structures is proposed by creating a combined connection with an intermediate element - a composite liner installed by a thermal compression method along the contour of the hole.
Thermal protection material on the base of silicon-carbide ceramics
Authors: Grinchuk P S , Tretyak M S , Chuprasov V V 
Published: January 2020

Abstract
The results of the thermal tests of silicon carbide ceramics, developed by the authors, intended for prospective use as the outer layer of the combined thermal protection of returnable orbiters and hypersonic aircraft are presented. Tests have shown that the developed silicon carbide ceramics is characterized by high operating temperature (about 2000 °C), resistance to thermal shock (heating rate ~ 65 K/s), and can withstand high thermal loads (~ 7 MW/m2) for a considerable time. Under comparable conditions, the proposed material exceeds by 1.5–2.5 times the WCu pseudo-alloy in terms of the ablation rate of the mass, while it is 5.5 times lighter. Due to the presence of free silicon in the material, the absorption of large heat fluxes can occur due to the melting and evaporation of silicon. This fact has received experimental confirmation. The problem of reducing the catalytic activity of ceramics due to the layer of silicon dioxide formed on its surface is discussed.
Structural analysis and topology design optimization of load bearing elements of aircraft fuselage structure
Authors: Htet Tun Lin 
Published: January 2020

Abstract
Aircraft total weight plays a major role in aircraft design which results in additional payloads and better performance. There are many ways to reduce weight of aircraft structures, for example, using composite materials.Composite materials such as CFRP offer significant weight reduction for aircraft. Weight reduction improves fuel efficiency of the aircraft which results cost of savings. Besides using these light materials structural design optimization is currently a valid methodology which is applied in advanced engineering. Topology optimization is used to yield an optimized shape and material distribution for a set of loads and constraints within a given design space. Whereas this paper deals with topology optimization of fuselage ribs. By using this optimization technique, weight can be reduced 18.36 % of the original weight.
Evaluation of the effect of changing the geometry of the abrasive grains of the grinding wheel on the characteristics of the roughness of the grinded surface
Authors: Bogutsky Vladimir , Shron Leonid , Yagyaev Elmar 
Published: January 2020

Abstract
In the article, based on the analysis of literature sources, the effect of changing the geometric characteristics of abrasive grains during circular grinding on the roughness parameters of the treated surface was evaluated. The proposed dependencies take into account the parameters of processing modes, the size of the abrasive grain and the radius of its rounding, their change during operation, as well as the change in the state of the working surface of the tool, taking into account the processing time. The obtained dependences make it possible to predict the kinetics of changes in the surface roughness in multi-pass grinding.
Effect of Ground Granulated Blast Furnace Slag as Partial Replacement in Fly Ash-Based Geopolymer Concrete
Authors: Abdul Sani M F A , Muhamad R , Mo K H 
Published: January 2020

Abstract
Replacement of Ordinary Portland cement (OPC) with geopolymer concrete (GPC) using fly ash is currently utilized in the construction industry to reduce the excessive carbon footprint. However, fly ash has lower strength development compared to OPC. Due to that reason, ground granulated blast furnace slag (GGBFS) is chosen to be blended with fly ash to produce GPC with improved mechanical strength. The analysis of the mechanical properties includes workability, compressive strength and splitting tensile strength of hardened GPC specimens have been carried out. The specimens were prepared with different percentages of GGBFS, from 0 % up to 20 %, partially replacing the fly ash-based GPC. Experimental results showed that the slump, compressive strength and splitting tensile strength of the GPC increase as the GGBFS percentage increases and found to be suitable for structural application.
Flash Flood Susceptibility Modelling: A Review
Authors: Saleh A , Yuzir A , Abustan I 
Published: January 2020

Abstract
Flash flood is common problem in the developed or developing country especially in urban areas. This is due to the changes of land use, poor planning of drainage system, deforestation and unplanned land use and etc. Flash flood susceptibility modelling (FFSM) for urban area is important to avoid the loss and etc. FFSM can be vital component and essential tools for planning and management of natural disaster and environmental. The objective of this paper is to review selected paper on flash flood susceptibility modelling using Geographic Information System (GIS) coupling empirical models. A lot of methods have been coupling with GIS to developed flood susceptibility modelling, for example, Weight of Evidence, Random Forest, etc. However, there is still lack of susceptibility model for flash flood. The GIS coupling method can improve the accuracy of flood susceptibility modelling. Thus, this paper will review the ability of GIS coupling with empirical models for the flash flood susceptibility modelling.
Exploration on Pavement Surface Conditions Attributed To Mineral Freight and Logistics Operations on Kuantan Road Network
Authors: Ismail A , Intan Suhana M R , Masri K A , Rapar N H 
Published: January 2020

Abstract
The most active mineral mining operations in Malaysia are located in Kuantan, Pahang. The rapid increases of the minerals operations are of concern due to its significant impacts on the environment and human health. While effects to the environment and human health are a great of concern, the effect to the transportation system also should not be neglected. With the continuous growth of these industries, there will be more heavy vehicles generated on road transporting minerals related products leading to several issues especially on road pavement damages. Pavement damages are always associated with its optimum function and may contribute to road crashes. There are several factors that influenced the pavement damages such as weather changes, quality of material use, improper maintenance and traffic operations. This study was conducted to explore the pavement damages occurrence based on traffic operation which focusing on heavy vehicles composition as centre for critical analysis. To achieve this study, the identification of regular routing used for minerals logistic operation from the mining source to the port was chosen as study location. This study was conducted by using visual observation survey and traffic volume survey. A set of historical data on route inspection supplied by Road Care also been used for analysis. Then, data obtained were analyzed using road disability level and road rating assessment. The result shows that the road rating leading to Kuantan Port was less satisfactory (rating C) with the marks of 7.27 and the highest type of damage found was cracking with 36% followed by rutting (33%) and potholes (31%). The outcomes from this study were hoped to bring some understanding on the impact of heavy vehicles towards transportation system within a local road network in Kuantan.
Numerical study of slope protected by rockfill and shredded tyre mixture gabion wall
Authors: Ainul Mardziah A C , Amizatulhani A 
Published: January 2020

Abstract
Abundance of discarded scrap tyre in Malaysia demand diverse recycling products, in order to reduce its environmental pollutions and simultaneously the negative aftermaths to society and future generation. Hence, this paper is established to investigate the potential of tyre derived geo-material as rock fill alternative in conventional gabion type retaining wall, replacing a portion of the non-renewable rock fill. 4-tier scrap tyre gabion wall (STG wall) in terraced position with various scrap tyre ratio from total gabion rock fills volume are modelled to retain a 5.0m height of existing failed slope. The model are analysed by finite element method in Slope/W 2007 software (Morgenstern-Price analysis method) to assess overall stability of the gabion wall and factor safety (FOS) of the treated slope. From this study, higher FOS is acquired when STG wall incorporated into the failed slope compared to using conventional gabion wall.
The Influence of Steel Slag as Alternative Aggregate in Permeable Concrete Pavement
Authors: Nadiatul Adilah A A G , Ayman Mohammed S Y , Ramadhansyah P J , Rokiah O , Hainin M R 
Published: January 2020

Abstract
This study identifies the pervious concrete with a high direct runoff on the pavement incorporating steel slag. This study is progressing in two stages i.e. 1 st stage is obtaining the best mix design by using cubic concrete samples with dimension of 100mm height based on 7 days compressive strength test. Indeed, different proportion of aggregate and ratio were tested in order to select the highest compressive strength which has reached 10.9 MPa in the first 7 days of curing. The cylindrical concrete sample with the dimension of 200 x 100 mm was used in the 2 nd stage. In addition, steel slag was used in the 2 nd stage besides the granite aggregate. In fact, three different percentages of steel slag are involved; 50% Steel Slag and 50% Granite; 30% Steel Slag and 70% Granite; and 70% Steel Slag and 30% Granite. Hydrologically, 13.8 mm/s is the highest Infiltration rate that pervious concrete has reached which has been recorded throughout permeability test. The rainfall intensity which plays an important role on the pavement was identified. Thus, intensity distribution frequency curve was developed using MSMA and compared within filtration rate results of pervious concrete. Mix design ten (M10) has the ability to perform efficiently during highest rainfall intensity meanwhile strength needed to be increased since 10.9 MPa in the first 7 days of curing is not sufficient.
Effect of Defect Width upon Burst Capacity of Composite Repaired Pipe
Authors: Leong K E , Lim K S , Sulaiman A S , Chin S C , Yahaya N 
Published: January 2020

Abstract
In recent years, FRP composite wrap repair is the most preferable pipeline rehabilitation system used in the pipeline industry. However, some issues concerning this repair method are not fully understood by the industry. Effect of defect geometries toward the efficiency of composite repaired pipe is one of the issues that concerned by the industry. Pipeline repair design codes and standards have been developed mainly focus on the defect depth and neglect other defect geometries such as defect length and defect width. Previous studies stated that defect geometries especially defect width should not be ignored in evaluating and designing pipe repair system. Therefore, the burst pressure of the composite repaired pipeline subjected to various defect widths was determined through this study in order to evaluate the effect of defect width upon the burst capacity of composite repaired pipeline. Finite element analysis was used to determine the burst capacity of the composite repaired pipe with rectangular shape of defect. There are three different widths were selected with constant defect length and depth. The base model of composite repaired pipe was developed and validated and then modified with the various defect widths in this study. The result shows that burst pressure for three different models vary with a percentage of 12.51% between the maximum burst pressure and minimum burst pressure. The stress contour plot extracted from the finite element analysis revealed that the area of highest stress (557.7MPa) is located around defect region. As the defect is getting wider and subsequently creating a bigger defect area, stress concentration is also getting larger at the defect region. With this, the composite repaired pipe tends to fail at lower pressure when the defect getting wider. Based on the results, the defect width is proven to affect the burst capacity of composite repaired pipe.