bluuebunny/crossref_metadata_2025_split huggingface dataset:
Performance and Application of Rapid Assembling Anti-blast Wall
Authors: Hongrui CAO , Zhigang ZHANG , Peng CHEN , lizi CAO , Zhuo CHEN 
Published: February 2021

Abstract
With too much emphasis being laid on the antiknock performance of the current anti- blast wall and its mobility thus ignored, in order to strengthen the temporary protective capability of battlefield, a kind of rapid assembling anti-blast wall is proposed, its structural form and assembly method are introduced. The antiknock ability and the durability performance of the anti-blast wall are fully analyzed with the latest application cases, its application in military and civil field are introduced. The application results indicate that the anti-blast wall shows flexible mobility in transportation and assembling, moreover exhibit high adaptive capability, as well as protective capability. So it possesses great value in further research and promotion, and strengthening the combination with other protective technologies is considered to be the future trend.
The effect of different MQL supply strategies into the cutting zone on the tool wear when turning of Ti-6Al-4V alloy
Authors: Lisowicz Joanna , Habrat Witold , Krupa Krzysztof , Janocha Piotr 
Published: February 2021

Abstract
Titanium alloys, especially Ti-6Al-4V alloy, are widely used in industry due to their good mechanical properties, such as high specific strength and excellent corrosion resistance. However, titanium alloys are also difficult-to-cut materials. Metalworking fluids are employed in the machining process to improve the machinability of titanium alloys. In recent years much attention has been paid to the use of the minimum quantity lubrication (MQL) techniques in the machining of the titanium alloys. In this study, the tool wear and its influence on the components of cutting forces have been investigated for different MQL supply strategies into the cutting zone - MQL via external nozzle and MQL via tool holder were investigated. The obtained results were compared with dry turning. It was concluded that the mechanism of tool wear is very similar for each cutting condition, however, it was also noted that the tool life is 28% and 68% longer for the MQL via external nozzle and MQL via tool holder, respectively, compared with the dry cutting conditions.
Improving the performance characteristics of human hip-joint implants by increasing the quality of processing and geometric accuracy of their spherical surfaces
Authors: Turmanidze Raul , Popkhadze Giorgi , Inasharidze Ketevan 
Published: February 2021

Abstract
In view of the fact that the endo-prosthesis heads of human hip-joint are operated in extreme conditions, in respect of load, the selection of corresponding material and also increase of precision and quality of machining of spherical surfaces is rather topical task. In the submitted work are reviewed the problems connected with definition of the influence degree of orientation of the sapphire crystal on its workability during diamond grinding with a butt of the ring and elaboration of the perspective, original scheme of formation of the incomplete spherical surface, particularly, of the sapphire head of endo-prosthesis of the human hip-joint.
Axiomatic Design as an innovation framework
Authors: Cavique Miguel , Dodun Oana , Brown Christopher 
Published: February 2021

Abstract
Innovation can be defined as a set of processes for altering human activity, with economic or social relevance. Innovation has been the economic driver of several companies and countries. This article presents laws with preconditions for innovation, and it proposes a framework for innovation based on Axiomatic Design (AD) theory. There are three laws which set out necessary preconditions to initiate and maintain innovation. Research, financing, and companies that can carry out an innovation project, must be available for a project. AD can be a tool for innovation. Three main elements to AD are: Suh’s axioms, to maintain functional independence and minimize information content; a structure, domains and hierarchies in which solutions develop; and a process, decomposing from abstract to detailed components and physically integrating components into a complete solution. Suh’s axioms ensure that design solutions are adjustable, controllable, and robust. These are essential elements in innovation. Design matrices for functional–physical relationships select for independence, then information content is used to select the best solution. Design structures are completed by zigzagging between functional, physical, and process domains, creating the hierarchical decompositions of abstraction while applying Suh’s axioms at each level.
Modelling the dependence between regular reliefs ridges height and the ball burnishing regime’s parameters for 2024 aluminum alloy processed by using CNC-lathe machine
Authors: Slavov S D , Dimitrov D M 
Published: February 2021

Abstract
New approach for obtaining regular reliefs onto cylindrical and tapered surfaces, by using ball burnishing process, performed on CNC-lathe machine having C-axis installed, is presented. It allows to simplify the burnishing tool and to perform the burnishing operation on the same lathe machine as previous cutting operations. The equations for the points coordinates calculation of the needed complex ball tool trajectory are shown. For their approbation, and in order to obtain a stochastic model which established the relation between the ball burnishing regime parameters (deforming force F, and feedrate f) and resulting height (Rz) of regular reliefs cells boundary ridges, an experimental investigation is carried out, using 2024-T3 aluminum alloy, and the methodology of the rotatable experimental plans. The corresponding response surface of the model is given and discussed. Conclusions about the advantages and disadvantages of the approach are given, and also for the suitable application of the obtained stochastic model.
A study on casting of structural mesh-like metal parts
Authors: Vlagkoulis D , Vasileiou A , Vosniakos G-C 
Published: February 2021

Abstract
Mesh-like parts are employed in order to reduce weight of mechanical structures. This study focused on cylindrical shaped mesh-like spacers. First, the mesh shape was parametrically defined and mechanical strength and strain under specific combination of axial and shear loads were determined by numerical simulation. Manufacture of the best design was then investigated focusing on investment casting under both gravity and vacuum modes with a simple, yet uncommon, top feeding system. The best combination of casting mode and parameter values was determined by numerical simulation on commercially available dedicated software, considering solidification time and lack of defects as primary quality indices accompanied by an investigation of residual stress and deformation fields. To implement simulation-based decisions the part was investment-cast employing 3D printed dies for constructing the wax models.
A computational wall mechanics study of an ascending thoracic aortic aneurysm under hypertensive conditions
Authors: Manopoulos C , Raptis A , Krishan W , Mavratzas C , Drandakis M , Astraka S , Kouerinis I , Vaxevanidis N M 
Published: February 2021

Abstract
A wall mechanics study is performed on two human aortic models, reconstructed from computed tomography (CT) image data using the Materialise Mimics software. The first model represents a rare ascending thoracic aortic aneurysm (aTAA) case with an excessive aortic ballooning that has displaced the cardiac cavities, and the second one a normal case free of cardiovascular diseases. Special attention was paid for the reconstruction of realistic models that do not deviate from the original data. The study presents the workflow from medical imaging data to structural simulation with the use of various software, aiming to examine the stress state of a normal aorta and an aneurysmal one (both patient specific) under a range of systolic blood pressure loads. Using the FEBio software, the effective (Lagrange) strain and the effective stress (von Mises) distributions are calculated for assessing the risk of rupture or dissection of the aorta.
Paint removal from thermoplastic materials and its influence on the physical-mechanical properties for the recycling of the polymer
Authors: Sover A , Zink M. , Michalak M. 
Published: February 2021

Abstract
Laser technology offers many advantages when removing paint (coating) layers from different substrates such as metals, plastics or ceramics. Sensitive carriers with a low melting point like thermoplastic materials can easily be thermally damaged or destroyed using this technology. This paper analyses the quality of the thermoplastic material after removing the thermoset layers from its surface by laser and aims to identify the changes of the most important properties of the polymeric material. The physical-mechanical properties of thermoplastic materials which were coated were investigated before as well as after the removal of the coating layers and compared with parts which were not coated. The focus was on melt flow rate, impact strength, and tensile stress as well as strain. The results show that even a small amount of the paint (coating) can change the behaviour of the thermoplastic material and thus has an impact on further processing. Moreover, it was found that removing the thermoset coating from the thermoplastic material leads to a considerable improvement of its physical-mechanical properties and consequently also extends the possibilities of recycling (reuse) of this polymeric material.
Structural aspects and chemical analyses on cutting process of metallic-ceramic materials
Authors: Lutcanu M , Istrate B , Coteata M , Chicet D L , Ionita I , Paraschiv C , Stirbu I , Badarau G , Cimpoesu N 
Published: February 2021

Abstract
Preliminary results on the behaviour of metallo-ceramic system during the cutting process were presented. The ceramic layer was obtained, after sandblasting of the substrate, through air plasma spraying with thicknesses of 30 μm on a steel substrate. Layers are chemically homogeneous, without cracks, pores or crevices. The thin layer (30 μm) present discontinuities with uncovered surfaces were the substrate is near in contact with the environment. Cutting process was realized on marking fiber laser equipment (Boron), of 30 watts’ maximum power and wave length of 1064 nm. There were obtained two different grooves on the test pieces with the following parameters: laser double pass at speed of 500 mm/sec, pulsed laser of 20KHz frequency and the beam power was set at 50% (around 15W) for the first groove) and at 80% (around 24W for the second groove). Structural, morphological and chemical evaluation of the cutting kerf was realized using scanning electron microscopy (SEM, Vega Tescan LMHII, SE detector, 30 kV, 15.5 mm WD) and energy dispersive spectroscopy (EDS, Bruker X-flash) using automatic/element list mode, Point, Mapping and Line features. This analysis highlighted the type of defects along the cut, respectively the phenomena occurring at the ceramic - metal interface.
Investigation of the occurrence and development of fatigue cracks after corrosion of welded samples of ferritic - austenitic steel
Authors: Georgiev Georgi , Argirov Yaroslav , Mechkarova Tatyana , Spasova Daniela , Stoyanova Aneliya 
Published: February 2021

Abstract
The article treats the occurrence and development of fatigue cracks in welded samples of ferritic - austenitic steel, which were previously subjected to corrosion. For the purposes of the study, two groups of sheet steel samples were prepared: the first group were reference parts, and the second group of samples were welded and then exposed to a corrosive environment. Corrosion tests were performed by immersing the samples in an acidic solution of (HCl, HNO3 and NaCl). Both groups of samples were tested with specially developed vibrating equipment for high cycle fatigue (106 - 107 cycles). The durability of SAF 2507 steel is estimated by the number of cycles until a crack is obtained at a certain alternating load. The damaged surfaces were examined by microstructural analysis to trace the shape and development of the crack in the structure of ferro-austenitic steel SAF 2507 after its welding and corrosion.
Reliability model of freight bogie damper based on real field data
Authors: Spiroiu M A 
Published: February 2021

Abstract
In the present paper is estimated the reliability probabilistic model of the dry friction damper of the freight bogie Y25. The analysis is made on the basis of real field data, observed in actual operations of freight wagons. The theoretical probability distributions used to model the reliability are exponential and Weibull. The Weibull reliability models are estimated according to the Regression Method and to the Maximum Likelihood Method.
Software application for uniform quantitative evaluation of social economy projects
Authors: Florea B , Marcu D , Ioana A , Semenescu A , Solea R , Iacob G , Niculescu F 
Published: February 2021

Abstract
The qualitative impact calculation for the implementation of a social economy project can be done using dedicated computing software. In this paper we have defined PQS which is an application on JAVA support that allows use irrespective of the existing support platform on the computer. The created application has the advantage that it can run both on computers and on other devices (tablets, phones, etc.). The input data are represented by the values assumed and realized in the project and are stored in a MySQL database.
Geometric stability of stepped shafts by ribbing its surface
Authors: Drachev O I , Gorshkov B M , Samokhina N S 
Published: February 2021

Abstract
The article discusses the technology of manufacturing low-stiff long multistage shafts made of stainless steels. A feature of this technology is the cutting of annular cooling fins on the entire surface of the shaft blank during machining and their use in thermal operations and further to finishing turning. To implement the technology, self-centering steady rests with double rollers were used during machining.
The cyber-production mechanization control
Authors: Gurjanov A V , Babenkov V I , Zharinov I O , Kosarevskaia S A 
Published: February 2021

Abstract
This article pays your attention to the cyber-production mechanized equipment control problem. There is a scheme proposed of automatic cyber-production segment control, mechanized technological aggregates and multi-chain manipulation systems. The control system is made in a multi-loop mode with a sensor measuring part to correct production automatics functionality errors. Within the technological aggregates there is a physical processes regulation loop in the machine working volume and one for the assembly units being manufactured material tide. There is a control loop in the manipulation system to move the rail chassis base movement and positioning loop of force and momentum regulation with a multi-chain grip. To control the cyber-production segment mechanization they propose a global loop to engage in the company virtual environment the equipment reference models and digital model (twin) of the product being manufactured.
Combustion of lean fuel mixtures with subcritical streamer microwave discharge
Authors: Bulat P V , Esakov I I , Grachev L P , Volkov K N 
Published: February 2021

Abstract
A sub-critical microwave discharge is used to achieve a stable ignition and combustion of lean air-fuel mixtures in a long tube. The microwave discharge is burnt at the presence of initiator with the quasi-optical microwave beam. The resonance way of initiation of a microwave discharge is more effective compared to traditional plasma-assisted ways of ignition and stabilization of combustion. The experimental observations show that ignition and combustion of a lean air and propane mixture in a long tube is achieved at low ignition limit with fuel/air ratio lower than 0.55. The results obtained are useful for design of new and improvement of the existing plasma-assisted technologies in aviation industry.
Simulation of the effect of secondary Doppler modulation for air targets with a turbojet engine
Authors: Gribanov P V , Kuznetcov V A , Menshikh N A , Andrianov D Y , Kokov R R , Baranchuk N A 
Published: February 2021

Abstract
The paper analyzes various approaches to modeling the effect of secondary Doppler modulation for turbojet engines. The issue of studying the conditions for the appearance of the effect of secondary Doppler modulation of the sounding signal of onboard radar stations for the further formation of the base of standards for the detection and recognition of air targets with reduced radar signature is considered. The results of modeling this effect based on ray approximation in the MATLAB environment are presented using the example of the situation of reflection of an electromagnetic wave from the blades of the first stage of a low-pressure compressor of a hypothetical turbojet engine. The stages of modeling the process of propagation of an electromagnetic wave from a radar station to a target and back, as well as “collecting” rays in the receiver antenna and forming a reflected signal with subsequent spectral analysis are described.
Automated installation for pipelines brazing in protective environments using induction heating
Authors: Murygin A V , Tynchenko V S , Kurashkin S O , Bocharova O A , Seregin Yu N , Bocharov A N 
Published: February 2021

Abstract
The article presents an automated installation for pipelines brazing in protective environments using the induction heating method. The types of pipe connections are considered, and the use of boxes to ensure the formation of a protective environment in the process of induction soldering is proposed. A diagram of a projected automated installation for induction brazing of pipelines in protective media, as well as its main technical characteristics are given. Using the proposed installation, soldering of welding of prototypes was carried out, the results of which are presented in the article.
Qualitative analysis relations
Authors: V Ya Tsvetkov 
Published: February 2021

Abstract
The object of this paper is to introduce relationship models into qualitative analysis to simplify this analysis. The article proposes a set of relations based on the predicate calculus. The concept of “quality relations” is introduced. The relations content is revealed: proportionality, complementarity, connectedness, opposition and dichotomy. Single, double and triple predicates are used. It is shown a qualitative difference between oppositional and dichotomous relations. The principles of qualitative analysis are described. The presence of two directions in the qualitative analysis is shown: social and intellectual. It is shown that qualitative relations are the basis for qualitative analysis and finding cause-and-effect relations. Methods of carrying out qualitative analysis are shown: discrete values, qualitative values, ambiguous values, qualitative process simulation.
Online information service for training in Industry 4.0 technologies
Authors: Gurjanov A V , Zakoldaev D A , Zharinov I O , Zharinov O O 
Published: February 2021

Abstract
A new element of the information service in the field of technical training of specialists for Industry 4.0 is an online platform that implements distance forms of e-learning for specialists. An online learning service is an interactive transdisciplinary infrastructure that accumulates knowledge in demand by the intellectual industry. The information potential of the online learning service allows students to create curricula based on an arbitrary sequence of studying theoretical disciplines. The designer of professional courses ensures the structuring of content and its presentation to the listener in informational forms that cause maximum involvement of students in the disciplines studied. The online training information service contains methods and scenarios based on generally recognized world practices and adapting the trajectories of individual training of specialists to modern industry requirements. A scheme of an online information service for training technical specialists for Industry 4.0 based on network technologies of interaction between the listener and educational content is proposed. It is shown that online training services form an informational competitive environment that integrates the resources of private business, state educational institutions, scientific, industrial and academic communities.
Automated systems for main oil pipelines diagnostics and control
Authors: Ospanov Ye A , Moldasheva Zh Zh , Toleuov T Zh , Shuteyeva G S , Demyanenko A I , Seidaliyev A A 
Published: February 2021

Abstract
The issues of diagnostics of the technological objects operation of the main oil pipeline and control of their operation modes using automated systems are investigated. The systems and methods for diagnostics and determination of oil leakage from main oil pipelines are studied. A method for remote detection of oil leakage from main oil pipelines is described. SCADA systems that allow monitoring changes in all pumping technological parameters in real mode are described. The mathematical formulation of the problem of controlling the operating modes of technological objects of the main oil pipeline in the conditions of indistinctness of some part of the initial information is formalized and obtained. Based on the modification of the idea of the principle of the main criterion, a heuristic method for the effective solution of the obtained fuzzy problem has been developed.
A combined heat and power (CHP) plant consisting of a microturbine and a Stirling engine
Authors: Antipov Y A , Smirnov S V , Oshchepkov P P , Khalife H S 
Published: February 2021

Abstract
Modern industrial development of governments is largely determined by the condition of the power industry. Nowadays, the energy policy of governments is focused on the improvement of highly efficient combined heat and power (CHP) plants, to conserve fossil fuels and achieve higher output power. The application of gas turbines and heat recovery systems is considered a promising method of increasing the overall efficiency of the power plant. In this article, a microturbine was considered as the prime mover in a CHP plant, while the exhaust gases were used to power a Stirling engine, and consequently generating additional power and heat, increasing the overall efficiency of the power plant. Also, the advantages and disadvantages of the Stirling engine were briefly discussed. Moreover, two general configuration schemes and a calculation method of the CHP plant have been developed. Finally, the results of utilizing the exhaust gases of a microturbine and a Stirling engine were presented.
Application of the PLP-01M microwave laboratory system using control samples to assess the accuracy of the results of studies of cadmium content
Authors: Maksimiuk N N , Rebezov M B , Tretyak L N , Varivoda A A , Artyukhova S I , Tolstoguzova T T 
Published: February 2021

Abstract
This paper considers and analyzes the results of examining samples for cadmium content by determining them on a Kvant-2AT atomic absorption spectrometer, taking into account the use of the PLP-01M microwave laboratory system and during sample preparation in accordance with GOST 26929 “Raw materials and food products. Sample preparation. Mineralization to determine the content of toxic elements”. The PLP-01M microwave laboratory system uses a fundamentally new method of sample preparation. The decomposition was carried out in a closed system - sealed fluoroplastic vessels under the influence of high temperature, pressure and microwave field. The microwave field in the working chamber of the furnace was created by a special generator-magnetron. Based on the results of the assessment of the operational control of the measurement procedure using samples for cadmium control during the implementation of the PLP-01M microwave laboratory system in the laboratory, the analysis procedure was recognized as satisfactory.