bluuebunny/crossref_metadata_2025 huggingface dataset:
Magnetic Properties of Low Grade Manganese Carbonate Ore
Authors: Wu Yan , Shi Bin , Liang Huan , Ge Wen , Yan Chun Jie , Yang Xiang
Published: October 2014

Rapid reduction roasting of low grade manganese carbonate ore by coal and biomass fuels from Hunan, China was investigated. Magnetic separation behaviors and magnetic properties of raw manganese ore and roasted manganese ores were analyzed. After reduction by coal and biomass fuels, the manganese ores demonstrate a new Mn-Fe oxide phase, showing obvious mixed magnetic behaviors of ferromagnet and paramagnet, and the magnetic susceptibilities of roasting ores rapidly increase to almost two orders of magnitude in comparison of the raw ores. The results show that magnetizing roasting technology could enhanced the magnetic properties of the manganese ores about two orders of magnitude higher than raw manganese ore at low roasting temperature. Thereby, we deduce that the weak magnetic separation combined with high magnetic separation could be adequate for roasted manganese ore to satisfy the requirement of electrolytic manganese industry. Application of biomass in manganese ore roasting process is promising to the effective use of biomass and for decreasing the consumption of fossil fuels in the manganese industry.
The Anti-Inflammatory Effects of Leptochloa Paste for External Use
Authors: Miao Ming San , Cheng Bo Lin , Chen Yuan Peng , Jiang Na
Published: October 2014

Objective: To study the effect of leptochloa on rats and mice ear swelling model. Methods: Each experiment group, mice were given corresponding drugs, according to the experiment requirement to give the corresponding dose, before the end of the experiment, the experimental model were given xylene,egg manufacture to corresponding experimental models, the determination of the experimental index.Results: Compared with the saline group, each dose Leptochloa paste group can significantly reduce the mice ear swelling; can obviously reduce the rat paw swelling. Are large doses Leptochloa paste have better effect to relieve the mice ears swelling and reduce rats paw edema. Conclusion: Leptochloa paste xylene-induced mice ear swelling model and egg white induced rat paw swelling model has a better therapeutic effect.
Automatic Bone Drilling in Orthopedic Surgery - Overcoming of the Drill Bit Bending at the Second Cortex
Authors: Boiadjiev George , Delchev Kamen , Boiadjiev Tony , Zagurski Kazimir , Kastelov Rumen
Published: October 2014

This paper discusses a problem appeared by drill bit bending during bone drilling in the orthopedic surgery, where precision is needed for screws to be implanted. The bone surface has a specific shape and the drill bit may slip a little along the bone before the process start, when a large thrust force is applied by hand-drilling. That could be seen and correct by the surgeon. But he can’t see inside – where the second cortex drilling starts. The drill bit bending leads to the worse screw fixation and even to the bone damage – if the drill bit stays off broken inside. To solve this problem an active force control is made by robot application. Experiments and results are presented.
A Study Surface Layer and Hardness Produced by Induction Hardened S45C Steel
Authors: Kusmoko Alain , Dahar Rosfian Arsyah , Li Hui Jun , Hadi Syamsul
Published: October 2014

A cylinder of Carbon Steel S45C with a ferrite and pearlite structure was analysed to improve the hardness and surface layer as well as the toughness. Accordingly, it is important to undertake a heat treatment process for the hardness and surface layer of this steel. The heat teatment process was carried out using induction heating with five different temperatures of 800°C, 900°C, 1000°C, 1100°C and 1200 °C followed by water quenching with certain cooling speed. The chemical compositions and microstructures of these samples were characterized by spectrometer and optical microscopy. The microhardness of the samples was measured and the surface treatment of the samples was examined using an induction heating furnace. The results showed significant case depth and surface hardness as well as microstructure with martensite and retained austenite that is hard and brittle because of internal stress. Further, to reduce the amount of retained austenite and internal stress, it is necessary to carry out tempering of 300°C, 500°C and 700°C in order to produce toughness of the steel with slightly reduce in hardness.
Electromagnetic Field Acting on the Scale Inhibition Experiment and Mechanism on Circulating Cooling Water of Power Plant
Authors: Liu Zhi An , Long Shan , Zhao Ju Dong , Xia Tian , An Hui Feng , Zhang Xin , Ma Wen Bo , Nu Hui Jie , Kong De Hao
Published: October 2014

The scale-inhibition effect of electromagnetic field was tested on circulating cooling water of power plant, and then the scale sample was analyzed by SEM and XRD. The results showed that, under optimum scale-inhibition conditions, aragonite content increased and calcite content decreased, and scale-inhibition rate was up to 78.2%; under the poorest conditions, both aragonite and calcite crystals existed, and the scale-inhibition rate was-201.0%; after treating with electromagnetic field, size of both calcite and aragonite particles decreased, making them more easily flown away and thus showing better overall scale-inhibition effect; when energy provided by the electromagnetic field was more than the decrease in free energy of the system, extra energy turns the calcite CaCO3 into other forms of metastable crystalline phases, then content of different crystalline phases is changed in favor of scale inhibition.
Structure and Corrosion Resistance of Ti-Ta-Nb Coatings Obtained by Electron Beam Cladding in the Air-Atmosphere
Authors: Ruktuev A.A. , Samoylenko V.V. , Golkovski M.G.
Published: October 2014

The results of structural investigations, mechanical properties and corrosion resistance testing of materials produced by the electron beam cladding of tantalum and niobium powders on cp-titanium substrates are presented in this paper. The treatment resulted in the formation of remelted alloyed layers of ~2 mm thickness. Any voids or cracks were not observed in coatings. Dendritic segregation of alloyed elements during cladding process occurred, however the microstructure was represented by fine laminar-type crystals. X-ray diffraction analysis showed the presence of α’-, α”- and β-phases. Formation of such structure is explained by a high crystallization rate. Microhardness of cladded layers was equal to ~ 350 HV while the base material hardness level was 170 HV. The corrosion resistance was estimated based on the sample mass loss. A concentrated solution (68%) of HNO3 at the boiling temperature was used as a corrosion medium. It was found that alloying the titanium with 16 wt. % Ta and 5 wt. % Nb decreased the corrosion rate by factor of 24 against cp-titanium while adding 16 wt. % Ta and 16 % wt. Nb decreased the corrosion rate by factor of 96.
Vibro Isolator with Neodymium Magnets Compensator of the Stiffness
Authors: Gurova Elena G. , Gurov Michail G.
Published: October 2014

In this paper device for vibroisolation with Neodimium-Iron-Boron (NdFeB) supermagnets is presented. The use of the supermagnets allows developing device for vibroisolation with less size in comparison with present vibroisolators.
Increase of Accuracy of Well Bottom Position Determination by Minimization of Seismic Vibration Finding Errors
Authors: Tsvetkov G. , Kostitsyn V.
Published: October 2014

In the given work, on the basis of the carried out researches at the decision of seismic surveying tasks an attempt on advancement of methods and means of excitation of elastic vibrations by the generator of seismic vibrations (GSV) is made. The geometry of the real GSV differs from the ideal axially symmetric form resulting in deviations of parameters of geometry of mass (deviations of the centre of mass, main central axes of inertia), and is a consequence of the static and dynamic disbalance.The character of forces and moments acting on the GSV, as a whole and on separate units, depends on quality of the law of change of total force of resistance of escapement and return of plunger; dynamic loads resuling in occurrence of transverse waves at excitation of seismic vibrations deterioting the accuracy of determination of well bottom position are formed.
Loading of the Manufacturing Systems Elements in the Process of Unsteady Mode Cutting and the Models of their Arrangement Deviations
Authors: Putilova U.S. , Nekrasov Yu.I. , Lasukov A.A.
Published: October 2014

To improve the treatment accuracy by on-line correction of the paths of the executive working parts (EWP) the authors study the processes of loading, deformation and arrangement deviation of the elements of the manufacturing systems (MS) under the changes of the cutting force components in the process of turning on machine-tools equipped with CNC systems of PCNC class. Estimation of the values of the technological components of the cutting force Px, Py, Pz is based on the phenomenon of arrangement deviation Δωi of the elements monitoring the servo drives of machine tools. To determine the compliance of the deviation magnitude Δwi with the technological components of the cutting force Px, Py a diagnostic subsystem was developed, involving the loading devices and dynamometric equipment. The diagnostic system is controlled through PCNC with the application of a specially developed hardware-software system. The data on changes in the values Px, Py and the respective changes in the attitude misalignment parameters in servo drives at various EWP minute feeds in CNC machine tools were determined by prior diagnosis of load characteristics servo drives, registered in the PCNC. So, the data of cutting force components Px, Py compliance with arrangement error ratios ΔωXп, ΔωZп. were established.
Analysis of Stress Concentrators Arising during MKY.2SH-26/53 Support Unit Testing
Authors: Burkov P.V. , Burkova S.P. , Timofeev V.Yu.
Published: October 2014

The paper presents the results of a bench test of MKY.2Sh-26/53 support unit produced by LLC Yurginsky machine engineering plant according all-Union State Standards (GOST 52152-2003) as well as the results of computer simulation of the loading process. These two methods are compared and weak points and stress concentrators in the support unit metalwork are found out.
Application Models of Continuum Mechanics Control Landfills
Authors: Kostarev S.N. , Sereda T.G. , Elancheva E.N.
Published: October 2014

We have developed the algorithms for state of municipal solid waste (MSW) landfills control affected by different external factors to determine the dependence of statistical characteristics on their condition. To achieve our goals, the optimal parameters of biological destruction of wastes on MSW landfill were determined experimentally and theoretically. Identification of certain specific factors influencing the biodegradation of wastes allowed us to develop a model of efficient system management of MSW landfill. In order to make effective decisions on development of the safe system of MSW landfill, the special software, which includes a unit “automated work place (AWP) of assessment of MSW landfill safety,” was designed to evaluate the safety both at the development stage and the stages of the operation and reclamation of MSW landfill.
The Development and Practical Application of Adaptive Pulse-Arc Welding in the Manufacturing and Repair of Metal Structures Responsible Function
Authors: Saraev Yu.N. , Lebedev V.A. , Solodsky S.A.
Published: October 2014

This paper deals with issues related to the development and practical application of adaptive pulse-arc welding in the manufacture and repair of metal for critical applications. Created methods of adaptive pulsed arc welding into account the results of studies of the kinetics of melting and transfer of electrode metal into the weld pool, which is of great theoretical and practical significance. These methods ensure defect-free formation of root, fill and cap welds in manufacturing steel in different spatial position.
Study Safety Environmental Protection Landfills Using Models Anaerobic Digesters
Authors: Sereda T.G. , Kostarev S.N. , Elancheva E.N.
Published: October 2014

The model of an anaerobic bioreactor in which the basic biochemical reactions under the influence of an acting atmospheric precipitation, technological modes recirculation of a filtrate and participation of alive substance is developed transform a file of waste products in three phase system (gas, a liquid and firm substance).
Use of Modified Carbon Nanotubes in Agricultural Technologies
Authors: Vaishlya O.B. , Osipov N.N. , Belenko A.A.
Published: October 2014

Results of laboratory and field experiments showing the broad use of small amounts of modified carbon nanotubes in agriculture are presented. The effect of modified on the production process of spring wheat variety “Novosibirskaya – 29” in West Siberia was investigated. It was shown that modifications of nanotubes by OH–groups (ethylenediamine) and COOH–groups (ozonation) are promising for the induction of plant resistance to drought and fungal pathogens.
Structural-Phase States and Mechanical Properties of VK8 Alloy after Gamma-Quanta Irradiation
Authors: Klopotov Anatolii A. , Potekaev Aleksandr I. , Klopotov Vladimir D.
Published: October 2014

. This article on the basis of experimental studies shows the data about γ-quanta affecting VK8 alloy. With structural studies it is found that γ-quanta irradiation leads to the volume fraction of the ternary phase and a decrease in the concentration of defects in cobalt. The irradiation γ-quanta irradiation leads to an increase in the content of the ternary compound type η-phase (CoxWyC) of variable composition and decrease the concentration of defects in the cobalt matrix. Formation of the ternary compound by irradiation determines the mechanical properties of the alloy, because the appearance η-phase results in an alloy with a grain size of less hardness alloys.
Definition of Peak Value of Welding Current at Pulsed Arc Welding
Authors: Krampit N.Yu , Krampit M.A. , Zubenko L.N.
Published: October 2014

Pulsed arc welding is one of the ways to control the process of an electrode metal drop transfer actively. Conditions of an electrode metal directional transfer during a pulse-arc welding were investigated, and provided the basis for welding current peak value calculation. Theoretical conditions of an electrode metal drop detachment during a pulse-arc carbon dioxide welding were proved experimentally.
Formation of Fine Structure of Differentially Hardened Rails
Authors: Gromov V.E. , Ivanov Yu.F. , Morozov K.V. , Alsaraeva K.V.
Published: October 2014

Differential hardening of rails by compressed air at different regimes is accompanied by formation of morphologically different structure, being formed according to the diffusion mechanism of γ ↔ α transformation and consisting of grains of lamellar pearlite, free ferrite and grains of ferrite-carbide mixture.By methods of transmission electron microscopy the layer by layer analysis of differentially hardened rails has been carried out, the quantitative parameters of the structure, phase composition and dislocation substructure have been established and their comparison has been made for different regimes of hardening. It has been found that the structure-phase states being formed have gradient character, defined by the hardening regime, direction of study from the tread contact surface and by depth of location of layer under study.
The Technology of Mig-Mag Welding with Low-Frequency Modulation of Arc Current
Authors: Solodsky S.A. , Lugovtsova N.Yu. , Borisov I.S.
Published: October 2014

The given paper suggests a new approach towards implementation of arc current low frequency modulating method in MAG, MIG-welding. The process facilitates controlling heat and crystallization processes, regulates the time of the weld pool formation and crystallization. Theoretical study allowed formulating the main criteria of receiving strong permanent joints to produce structures with advanced reliability as it creates favorable conditions for producing a more balanced deposited metal structure and reducing the heat-affected zone. Regulating the time of weld pool formation and crystallization improves weld formation and increases labor productivity when welding sheet metals.
Crack Resistance of Weld Seals, Hardening Methods and Composite Tools Quality
Authors: Petrova V.A. , Bakanov A.A. , Walter A.V.
Published: October 2014

The paper presents a pretreatment of the substrate material prior to the thermal spraying process. The ultrasonic finishing method allowed creation of a rolling topography comprising alternating projections and cavities, compressive stress, and increase of the number of defects on the surface. Optical profilometry and metallographic analysis allowed detecting of adhesion zones which form a strong physicochemical bond at the interface between the coating and the substrate material. This interfacial adhesion should provide a firm adhesion strength in end products.
Influence of Molybdenum Nanopowder Concentration on Welded Joint Microstructure
Authors: Kuznetsov M.A. , Zernin E.A. , Lukashov A.S. , Zhuravkov S.P.
Published: October 2014

The paper outlines experimental results of structure formation in welded joints by means of concentration change of molybdenum nanostructured powders in shielding gas. Molybdenum nanostructured powders are arc welded in a liquid welding pool by consumable electrode in argon. It was found out that different powder concentration forms different microstructure of deposited metal.
Laws of Development of Deformation Folds in [1- 11] Copper Single Crystal at Axis Compression
Authors: Lychagin Dmitry V. , Chumaevskiy Andrey , Alferova E.
Published: October 2014

.Deformation folds on the surface of copper single crystal with compression axis orientation [] are analysed. Folds are an element of the deformation relief on meso-and macro-level secondary to macrobands. Folds are generated in several major crystal areas due to sample bending or striation in its end area.
Development of Mixture "Clay – Electro-Smelting Slag" for Ceramic Brick
Authors: Torosyan V.F. , Torosyan E.S.
Published: October 2014

Industrial transition to a totally new level of resources and energy saving necessitates improving the technical level of building materials manufacturing, growing their raw materials base, the assortment, enhancing the quality of manufactured products, cutting their cost price. It requires, first of all, carrying out more detailed research in properties of clay and clay loams, and selecting optimal additives for pottery works. Such disadvantages of clays as burning sensitivity, low compression resistance and flexural strength in a burnt state, low frost resistance cause the impossibility of their application without corrective additives. It is quite difficult to find an additive which can solve all the technological problems mentioned above. This paper provides the development of mixture "clay – electro-melting slag" for ceramic brick, moreover, addition of a steel-smelting slag in the fusion mixture results in the change in mixing water content of ceramic masses, strength and coloration of ceramic samples.
Methods of Forecasting Wear Resistance of Cutting Tools Based on the Properties of their Materials
Authors: Bibik Vladislav , Petrova Elena
Published: October 2014

The author considers methods of forecasting metal-cutting tool life based on characteristics of cutting tool material. These characteristics depend on differences in numerical values of physical and chemical properties of tool material due to changes in its composition, structure, and production process variables. The described methods allow obtaining the information necessary for forecasting the tool life beyond the process of cutting, for example at the stage of cutting tool manufacturing. The author suggests using the method of registration of thermo-physical properties of the tool material as a promising forecasting technique.
New Carbon-Fluorine Containing Additive for the Welding Fluxes
Authors: Kozyrev N.A. , Kryukov R.E. , Kolmogorov Dmitry E.
Published: October 2014

Carbon-fluorine containing additive for AN-348A, AN-60 and AN-67 fluxes was developed. Application of the additive reduces the gas content of the weld as well as its contamination with oxide non-metallic inclusions and improves the complex of required mechanical properties and toughness (especially at low temperatures).
Investigation on the Elemental Chip Formation Process in Hard-to-Machine Material Cutting
Authors: Lasukov A.A. , Chazov P.A. , Barsuk А.V.
Published: October 2014

The mechanism of discontinuous chip formation has been studied less than the mechanism of continuous chip formation. However, when most modern materials having specific physical and mechanical properties are subject to machining, such processes are featured by discontinuous chip formation. The paper describes the basic dependencies of discontinuous chip parameters on machining modes. This is a trial undertaken to introduce an explanation of how the basic factors of the cutting process influence over parameters of chip formation.
Resource Saving Technology for Plasma Treatment of Molybdenum Ore Tailings
Authors: Volokitin Oleg G. , Skripnikova Nelli K. , Shekhovtsov Valentin V.
Published: October 2014

In the production of mineral fibers it is possible to synthesize high-temperature silicate melts from molybdenum ore tailings using low-temperature plasma. Physicochemical research was carried out in relation to raw materials and melt products.
Influence of Structural Phase State of the Surface Layer on Wear Resistance of Cutting Edge of Metal-Ceramic Insert when Metalcutting
Authors: Ignatyev A.S. , Mokhovikov А.A. , Ovcharenko V.E.
Published: October 2014

The paper considers frictional aspects of wear of metal ceramic insert working faces when metalcutting depending on structural phase state of their surface layers.Keywords: metal-ceramic alloy, surface layer, structural phase state, electron-beam processing, resistance of metal-ceramic insert when cutting metal.
Information Systems Project Risk Assessment: Expert Approach
Authors: Chernysheva T.Yu. , Gnedash E.V. , Zorina T.Yu. , Lenskaya N.V.
Published: October 2014

Types of information system project risks have been analyzed. Models of Information System Risk Management are presented. Expert assessment of IS project risks by the Analytic Hierarchy Process is proposed.
About Heating Plants Control System Developing on Basis of Neural Network Usage for PID-Regulator Parameters Optimization
Authors: Eremenko Yuri , Poleshchenko Dmitry , Glushchenko Anton
Published: October 2014

An adaptive control system implementation is described. Such system is based on a neural network, used for online PID-regulator coefficients tuning. The backpropagation online training method is used. It is modified by adding a rule base. It contains conditions on choosing neural network learning rate. PID-regulator with neural tuner and conventional PID-regulator were used as regulators during the process of heating furnace control modeling. Such experiments were made for different loading furnace modes and setpoint schedules. The 11% economy of time on setpoint schedule realizing was achieved with the help of proposed neural tuner..
Numerical Models of Rubber-Textile Composites of Conveyor Belts
Authors: Bouda Tomáš , Bocko Peter , Hájek Tomáš
Published: October 2014

Conveyor belt is the carrying medium of a belt conveyor system and it’s widely used by various industries. From a material modeling point of view it is a long fiber rubber-textile composite, where textile fibers bear the load. This contribution presents a procedure for material parameters calibration of rubber-textile composite, where large-strain phenomena need to be expected.
Possibilities of Experiments and of Using Experimental Results Obtained from the Test Equipment for Measuring Properties of Conveyor Belts Pipe Conveyor
Authors: Stehlíková Beáta , Molnar Vieroslav , Fedorko Gabriel
Published: October 2014

The publication deals with the test equipment for measuring properties of conveyor belts of pipe conveyor. The device was designed with the aim of setting tension force and measuring the contact forces at positions which correspond to positions of idlers at hexagonal idler housing of pipe conveyor. Contribution gives an overview of experimentally obtained statistics, relations and relationships. Presented several results of analyses focused on potential context between the information brought by experiments and practical application.
Recent Developments in Vibration Based Diagnostics of Gear and Bearings Used in Belt Conveyors
Authors: Obuchowski Jakub , Wylomańska Agnieszka , Zimroz Radosław
Published: October 2014

Local damage detection in bearings/gearboxes is one of the most intensively explored problems in condition monitoring literature. Also for mechanical systems used in mining industry this issue might be critical due to short time local overloading of surfaces in contact in gear-pair or bearings that often happens during operation. In general, the problem of local damage detection is well defined in literature, however, specific factors related to the mining industry, require adaptation of existing methods or even developing new approaches. In the paper, some of the most promising techniques with mining machinery context are briefly re-called. The key problems identified for mining machines are: operation under time-varying load/speed conditions, presence of time varying signal to noise ratio and non-Gaussian noise (impulses that appear incidentally, randomly, not with expected cycle or cyclically, however with different cycle related to another damage). All these situations motivated us to find novel solution. The paper might be considered as brief review of recent achievements in the field rather that comprehensive, holistic description of the problem.
The Use of Screw Conveyors in Practical Applications
Authors: Tomašková Marianna , Sinay Juraj
Published: October 2014

Screw conveyors are continuously operating transport mechanisms designated for conveying bulk materials that involve the use of a spiral screw rotating inside a stable trough moving the material along the trough. They are used for specific needs of transportation of bulk materials for shorter distances with lower transportation performance. These are conveyors without traction components. The present paper is concerned with the use of screw conveyors in practice and the risks associated with their operation.
Use of Thermovision for Monitoring Temperature Conveyor Belt of Pipe Conveyor
Authors: Michalik Peter , Zajac Jozef
Published: October 2014

The paper deals with using new technologies to monitor progressive changes in temperature conveyor belts loaded static forces without the transported material. Multiple measurements were performed to demonstrate the functional dependence of temperature conveyor belt of pipe conveyor to the size of the tensioning force.
Affordable Photogrammetry as Applied in the 3D Modelling and Monitoring of Underground Mining Exploitation and Transport
Authors: Ristović Ivica , Vulić Milivoj
Published: October 2014

The application of photogrammetry, with a particular emphasis on 3D modelling and monitoring, is of interest in the field of underground mining transportation. In the article, a practical assignment concerning the creation of a 3D model with the aid of an ordinary photographic camera and a personal computer, practically conducted by a student with the aid or supervision of a lecturer at the University of Ljubljana, Slovenia, as a part of the academic process that is, in the effort to instil practical knowledge into students, part of pursuing a mining degree, is described in detail, delineating all the procedures involved, any appearing problems, the means to deal with any appearing problems and the means to employ the obtained 3D model in the future. The aim of creating the 3D model was to demonstrate the convenience of applying photogrammetry in the fields of mining, geology and geotechnology, as well as to introduce a tool that is, in terms of its efficiency, relatively poorly represented in Slovenia and, taking into account its affordability along with its efficiency, to consider its practical application in the mining, geological and geotechnological professions.
Multi-Criteria Evaluation – A Tool for the Selection of Steel Wire Rope
Authors: Šaderová Janka , Rosová Andrea , Bindzár Peter , Kacmary Peter
Published: October 2014

The paper gives an example of selecting a suitable type of steel wire rope for selected transport device. The selection of steel wire rope was performed by selected method on the basis of multi-criteria evaluation. The criteria for evaluation of selected types of ropes were chosen in the way to take account of ropes parameters and the operating conditions of the transport device.
Non-Destructive Testing of Steel Wire Rope Transmission Area to Rope End by Magnetic Flux Leakage
Authors: Peterka Pavel , Krešák Jozef , Kropuch Stanislav , Bérešová Andrea , Mitrík Dušan
Published: October 2014

At present the need of nondestructive testing of rope bridges state appears often. Modern maintenance trends using non-destructive checking allow to detect the state of these materials in service without breaking their integrity. From the point of view of so far used non-destructive testing methods the area of cable end is not accessible. The magnetic properties research of these materials and the subsequent design of new structures for scanning elements will enable non-destructive monitoring of the state of the ropes steel material of static constructions, especially their anchoring. The article aims to present the results from tracking of the magnetic flux around the cable end and signal runs from particular designed and investigated scanning elements placed above artificial defects created closely to the cable end.
Qualitative Assessment of the Working Condition of Ropes in Rope Attachments
Authors: Kwaśniewski Jerzy , Krakowski Tomasz , Ruta Hubert , Molski Szymon , Pypno Marek , Ratuszny Krystian
Published: October 2014

Application of compact ropes made of area-contact wires in new types of hoisting installations operated at deep levels 1300 [m] and in smaller bucket hoists allows for reducing the drum size in the winder machine and the diameters of the rope pulley, thus prompting the optimization of their size and weight. Inspection of such ropes (BRIDON Dyform 34 LR, 18, 20, 25, 42 [mm] in diameter manufactured by Drumet) after an 8-years’ service by magnetic methods does not reveal any wearing and hence new diagnostic methods need to be developed or the existing ones improved. In consideration of stress concentrations, the working conditions of ropes needs to be determined whilst in service, particularly in tapered grips in rope attachments. This study summarises the diagnostic method employed to determine the working condition of ropes in tapered grips and describes the diagnostic equipment being currently developed, intended for inspection of rope condition in attachments.
Rope Mechanisms, Quality and Safety Management in Logistics Facilities
Authors: Drahotský Ivo , Cempírek Václav
Published: October 2014

Article is aimed at quality and safety management in logistic buildings. Article focuses on possible views on these questions in relation to warehouses and manipulation techniques. Important issues include HR management – operating staff, their quality and qualification directly influences quality and safety of processes. The Article is divided into parts: analysis of current status, legislation and suggestion of further possible views helping to increase quality and safety.
Two Alternatives for Mathematical Expression of Triangular Strands in Six Strand Ropes
Authors: Stanová Eva , Fedorko Gabriel
Published: October 2014

The creation of computer model of triangular rope strand needs mathematical interpretation of individual wires. It can be based on different assumptions in its derivation. The paper presents two options. In the first case, it is known the number of wires and the size of their diameters in the first layer of the strand, in the second case it is known number of wires and the diameter wires forming the core of strand. The parametric equations of wire axis are derived for both cases. The geometrical models of the strands are generated on the base of these equations.
Application of SELBESTTRA Software for Choosing a Transportation System for Mineral Raw Materials through Special Protection Areas
Authors: Erdeljan Dragana , Grujić Miodrag
Published: October 2014

The software package SELBESTTRA offers a choice of the best transportation systems of mineral resources with technical, economic and ecological point of view. By entering of parameters of production and the parameters of the proposed transportation route, the software gives us the best solution regarding the protection of environment through which transport is carried out and that for the best variant from techno - economic standpoint. By Changing of input parameters, we can control output data in order to obtain the best solutions in terms of requirements of investor.
Vibration of Initially Stressed Functionally Graded Material Plates and Shells
Authors: Monslin Sugirtha Singh J. , Kari Thangaratnam R.
Published: October 2014

Finite element formulation using semiloof shell element for initially stressed vibration of Functionally Graded Material (FGM) plates and shells are presented. The influence of volume fraction index on the vibration frequencies of thin functionally graded plates and shells and variation of temperature on frequency are studied. New results are presented for initially stressed vibration of FGM plates and shells.
Structural Reliability Analysis for UAV Center Wing Based on Stochastic Finite Element
Authors: Zhang Da Qian , Fu Xin Ping , Tan Xiao Dong
Published: October 2014

In general it is difficult to obtain the results directly during process of structural reliability designing because of the complexity of the structure. It can calculate the structure reliability and failure probability effectively according to the combination of finite element method and theory of reliability. This paper introduces a method of structure reliability based on finite element method, summarizes a common method which has an important engineering application value to calculate the reliability such as using Monte-Carlo method to calculate reliability analysis combining with finite element method, recommends a common used software to reliability design and shows the process of using the software to reliability analysis.
Analysis of the Strength of Helical Buckling Tubing String
Authors: Zhong Da Hu , Xia Hui , Dou Yi Hua , Cao Yin Ping
Published: October 2014

Deformation of helical buckling appears on tubing string under axial compressive loads, and it may even make the tubing string fail when the loads are excessively large. To make clear stress distribution and variation of helical buckling tubing string, the formulas of equivalent stresses inside and outside of the tubing string are deduced based on the spring theory and the fourth strength theory. From the analysis, we can see that the equivalent VonMises stress increase with the clearance of tubing string and casing, and the increase are 22.44 percent and 45.9 percent respectively for inside and outside stress with clearance increase form 29.1mm to 39.69mm. The proposed method used for the helical buckling tubing string makes up the insufficient of traditional tubular mechanics effectively.
Digital Thermometer Design Based on Single-Chip AT89C2051
Authors: Zhang Hui Ping , Qin Zheng Kun
Published: October 2014

Single-chip AT89C2051 as the main-control component of the device, we designed a digital thermometer from the aspects of hardware, it with the aid of temperature sensor DS18B20, the device used single bus technology to detect the ambient temperature (analogue) is converted into digital quantity, it was accepted, processed, judged by single-chip microcomputerand then control and display. The temperature measured range in - 30 °C to + 120 °C, the accuracy class + 0.5 °C, four LED Nixie tube as display mode.
Numerical Simulation on Drawing Deep of Cylindrical Pieces Based on Dynaform
Authors: Wang Jun Hong , Bao Xu Dong , Feng Hai Mei , Du Chang
Published: October 2014

Abstract: The design and manufacture of mold often rely on the experience of the designers, which led to the fact that the mold needs to be repeatedly debugged and corrected. Numerical simulation technology enables the simulation of the forming process of sheet metal and prediction of defects in design, thus to improve labor efficiency, save time and reduce costs. In this paper, the software Dynaform is used as a platform and a three-dimensional model is built to numerical simulate and analyze the drawing deep of a typical thin-walled cylindrical piece.Orthogonal experimentis adopted to analyze the impact of BHF, punching speed and punch-die gap on forming quality of the drawing pieces. With minimum thickness and wrinkling as indicators, the impact of various factors is analyzed and a set of optimum parameters is found out that is, BHF is 20kN, punching speed is 2000mm / s and punch-die gap is 0.9mm.
Improving the Efficiency of Carbide End Mills by Deposition of Nano-Scale Multi-Layered Composition Coatings
Authors: Vereschaka A.A. , Mokritskii B.Y. , Pustovalov D.A. , Vereschaka A.S. , Bublikov Jury I. , Oganyan Gaik V.
Published: October 2014

The study has considered the challenge of improving the efficiency of carbide end mills through modification of the physical and mechanical properties of tool by forming on its working surfaces nanostructured multi-layered composite coatings with use of filtered cathodic vacuum arc deposition (FCVAD). The technique of deposition of three-component multi-layered composite coatings with nanosized grain structure and thickness of sublayers on working surfaces of end mills has been developed. The developed coatings contain three key components, each of which has a strictly functional purpose specifying enhanced wear resistance, strong adhesive bonding with tool material and barrier properties with regard to heat flows and diffusion, and that allows improving the efficiency of carbide end mills. The study has found out that when carbide end mills with developed coatings are used at cutting, the cyclic thermomechanical stresses acting on the cutting part of the tool during the cutting stroke and idle run of cutting edge of end mills are smoothed, and that leads to the decrease in the rate of tool wear and improves the efficiency of carbide end mills. The study was supported by grant No. 9.251.2014/K, project code 251.
Based on Analysis of Finite Element Analysis of Automobile Transmission Shaft Comprehensive Optimization
Authors: Yuan Heng Yi
Published: October 2014

The shaft as an important parts of automobile transmission system, in the process of the car have the effect of rotational speed and torque. Due to the structural characteristics of its low frequency, small stiffness, universal joint, such as the existence of the additional moment drive shaft inevitably exist when high speed vibration phenomenon. So the shaft vibration problems to deal with the vehicle ride comfort, comfort and dynamic performance has important significance. On the basis of the finite element software ANSYS, the physical design of drive shaft. Analyzes the mapping grid finite element model of transmission shaft, facilitate accurate transmission shaft strength calculation. Based on the inherent frequency and vibration model of finite element method to calculate transmission shaft, using experimental modal technology for modal analysis of the shaft, the test results verify the reliability of the finite element model. On this basis, the drive shaft assembly constraint modal finite element analysis, can be used as the basis of further research.
The Research on Virtual Prototype of Rod-Cone Docking Mechanism
Authors: Xie Xin Hua , Zhou Jun Jie , Zhao Gang , Li Wan Qing
Published: October 2014

The achievement of space orbit service space autonomous docking technology. At present, many kinds of autonomous docking mechanism are appeared according to different service object. In order to widen the application range from lives of docking mechanism, design a space rod - cone docking mechanism in this paper. The mechanism can be in the context of a larger space, achieve self-occupied docking. And based on the ADAMS-View to complete the mechanism dynamics virtual prototype. According to the space orbit autonomous docking technology, set up virtual prototype mainly docking detection parameters, Analysis of dynamic characteristics in the whole of the docking process and complete the mechanism.
Temperature Control of Bone Cement for Enhancing Applicability and Safety in Vertebroplasty
Authors: Tai Ching Lung , Chen Yi Lu , Chen Shen Yao
Published: October 2014

Vertebroplasty has been widely accepted in treatment of osteoporotic vertebral fractures. Polymerization of bone cement stabilizes the fractured vertebra by increasing its mechanical strength, thereby providing symptomatic pain relief. Many factors affect the reaction of polymerization of polymethylmethacrylate and, therefore, the reaction rate and injection permeability of bone cement. This may increase the probability of a surgeon missing the crucial period, leading to the increase of the risks of uneven cement distribution, cement leakage and premature hardening of cement. Hypothermic manipulation of bone cement is expected to reduce reaction rate and hence, extending the handling time. However, in a manner of reducing the environmental temperature of bone cement, there are still uncertainties on handling time, cement distribution pattern and injection permeability of cement. This study is thus designed to investigate the efficacy of temperature control for enhancing applicability and safety of bone cement.
Measuring the Deflection of a Circular Plate on an Elastic Foundation and Comparison with Analytical and FE Approaches
Authors: Klučka Richard , Frydrýšek Karel , Mahdal Miroslav
Published: October 2014

The solution of the interaction between a structure and its foundation is an important problem in mechanics and technical applications. This paper presents a solution of a circular plate rested on an elastic (Winkler) foundation. A jig was created for the purpose of loading a circular plate with a specific bending moment and force on the plate circumference. Laboratory testing was performed to determine the deflection in the centre and at the edge of the plate. Measurement apparatus was assembled and measurements were carried out; the results of the measurement were compared with the analytical solutions and FEM results. On the basis of these comparisons, the foundation modulus was determined. The experiment, analytical solution and FEM give similar results, thus providing a solid basis for technical applications.
Barycentric Interpolation Newton-Raphson Iterative Method for Solving Nonlinear Beam Equations
Authors: Wang Zhao Qing , Jiang Jian , Tang Bing Tao , Zheng Wei
Published: October 2014

A barycentric interpolation Newton-Raphson iterative method for solving nonlinear beam bending problems is presented in this article. The nonlinear governing differential equation of beam bending problem is discretized by barycentric interpolation collocation method to form a system of nonlinear algebraic equations. Newton-Raphson iterative method is applied to solve the system of nonlinear algebraic equations. The Jacobian derivative matrix in Newton-Raphson iterative method is formulated by the Hadamard product of vectors. Some numerical examples are given to demonstrate the validity and accuracy of proposed method.
Study of Size Effects on Stiffness Matrix
Authors: Chen Xiao Liang , Ding Jian Ping , Wang Xiao Rong
Published: October 2014

The surface effect can be significant for nanoscale structures, and the surface energy is expected to be prominent in governing the geometric size-dependent deformation and strength mechanisms of single crystals at the nanoscale. In a new numerical method which combines surface energy and three-dimensional finite element analysis, size effects on the stiffness matrix with surface effects was studied numerically. Results show the surface stiffness matrix is more and more important relative to the bulk stiffness matrix with the size of elements decreasing.
Dynamic Analysis and Structural Optimization for a Logging while Drilling Neutron Instrument
Authors: Wei Chao , Sun Qiu Yue , Qiu Yuan Ying , Ye Jun Jie
Published: October 2014

Logging while drilling (LWD) neutron instrument is a core equipment of the pulsed neutron logging technology, its anti-vibration performance has a direct impact on the measurement accuracy. For improving the anti-vibration performance, a reverse design method was proposed to avoid the resonance region due to increasing structural stiffness. The dynamic performance of the original instrument was analyzed, the weaknesses of its anti-vibration performance were determined and its topologies were improved. Moreover, the structural parameters of the instrument were optimized to raise the structural base frequency. The results show that the base frequency of the instrument increases high enough, the influence curves and surfaces of the base frequency with design variables provide a theoretical reference for the design of a LWD neutron instrument.
Influence of Swirling Air on Ignition and Combustion Characteristics in Boron-Based Ducted Rocket
Authors: Wang Hong Yuan , Xu Yi Hua , Hu Xu , Zeng Zhuo Xiong
Published: October 2014

Three-dimensional two-phase flow in the typical double downside 90°afterburning chamber of boron based ducted rocket is numerically simulated by means of Realizable turbulence model, one-step eddy-dissipation combustion mode1 and the ignition and combustion mode of boron particles of KING with considering the film moving effect in the high-speed flow. The results show that co-swirl and counter-swirl air in the double side of inlet enters into afterburning chamber to make mixture of air and gas more fully and combustion efficiency increases with the increase of swirl number. Boron particles and total combustion efficiency with co-swirl is higher than counter-swirl when the swirl number is less than 0.179. On the contrary, the counter-swirl is higher than co-swirl when the swirl number greater than 0.385, the co-swirl is balance to the counter-swirl when the swirl number is about 0.2; the ignition time of boron particles is reduced with swirling air, its minimum can be attained when swirl number is 0.385.
Synthesis of Structural Flame Retardant Polyether Polyol and its Flame Retardation Performance Evaluation
Authors: Jia Run Ping , Wei Lu , He Xin Yao , Zong An Xin
Published: October 2014

A new polyether polyol of introducing melamine/phenol into it’s molecular chain which with structural flame retardant performance has been synthesized successfully in this paper. Both of FTIR and 1H NMR spectra proved the presence of the characteristic peak for triazine ring/benzene ring in melamine-phenolic structural flame retardant polyether polyol (MPFRP). Scanning electron microscopy analysis (SEM) observations showed that all the PUR foam have uniform and dense cell structure. The limiting oxygen index (LOI) of MPFRP based PUR foam can be reach to 24.8%, which was higher by 37% than that of PUR foam fabricated by 4110 based polyether.
Selective Epoxidation of Styrene with Mn-TAML/TBHP
Authors: Wang Ge , Li Ran , Liu Ya Ru , Liu Hui Ying , Sun Zhi Min , Wang Xiao Ning , Wu Zheng , Liu Zhen Dong
Published: October 2014

Styrene was selectively oxidized to styrene oxide with macrocylic amido Mn (II) complex as catalyst and tert-Butyl hydroperoxide (TBHP) as oxidant. The effects of reaction temperature, reaction time, solvents, amount of catalyst and oxidant on the conversion and selectivity of styrene epoxidation were investigated. The optimized conditions were achieved by molar ratio of n (catalyst) :n (styrene)=1% in acetonitrile solvent at 75 °C in 1.5 h. Under optimum reaction conditions, reaction conversion of 92.6% and selectivity of 86.9 % were obtained.