bluuebunny/crossref_metadata_2025 huggingface dataset:
Replaceable Hydraulic Parts in Spiral Volute Pumps
Authors: Ivanyushin Arkadiy , Rudenko Andriy , Tverdokhleb Igor
Published: September 2014

The article reviews some questions regarding replaceable hydraulic parts (RHP) for pumps with spiral volute. A range of optimal pump parameters achievable using RHP is considered.
Influence of Operation Mode on Efficiency and Life Cycle Cost of Double Suction Pump
Authors: Tverdokhleb Igor , Kostyuk Aleksandr , Sokolov Sergey
Published: September 2014

The widely known fact that the parameters of many pumps are not correspond to systems characteristics which either changed in time or initially were evaluated incorrectly. In this report the main reasons of pumps operation beyond the operation range are presented. Influence of such operation on Life cycle cost. The real cases of inefficient and unreliable pump operation are presented in report. Also the results of retrofitting of pump station are presented.
The Design Features of BB4 and BB5 API 610 Pumps for Water Injection Systems
Authors: Viter Dmitriy , Mikhaylov Yury , Rodenko Oleg , Tverdokhleb Igor , Obozniy Alexander , Biryukov Alexander
Published: September 2014

The article describes design features of sectional BB4 and double case BB5 pumps according to the API 610 requirements applied in water injection systems in order to maintain the reservoir pressure during oil production. The pumps considered are CNSp240-1422 and CNSDp240-1422 produced by HMS Group. Design optimization of casing parts is conducted by means of Finite Element Analysis in order to minimize the mass. The optimization criteria are a static strength and stiffness, and the corresponding results of strength calculation are presented.
Monitoring of Pumping Unit Operation in Indicators of Energy Efficiency of its Work
Authors: Sotnyk Mykola I. , Sapozhnikov Serhii , Prykhodko Kateryna
Published: September 2014

The influence of pumping unit’s elements on the overall energyefficiency of its work is viewed in the article. The areas of pumping unit’s operation effectiveness are identified and evaluated within the field of his QH characteristics and efficiency of its use in real technological process. The methodology of pumping unit’s operation evaluation in different modes through indicators of unit electrical energy consumption is developed.
Effect of Lubrication of Fluid Friction Bearings with Media of Complex Rheology
Authors: Savin Leonid , Kornaev Alexey , Kornaeva Elena
Published: September 2014

The paper investigates the two-dimensional flow of an incompressible viscous fluid of complex rheology in the gap between two cylinders with respect to fluid friction bearings. The viscosity of the fluid is defined as a physical quantity field, satisfying the criterion of minimum friction loss approximated as a function of shear-strain rate and pressure. The resulting function is used to calculate the carrying capacity and the friction torque in the bearing. Computer experiment resulted in showing the effect of friction loss lowering due to considering complex rheology of lubricating material.
Studying the Interaction of Liquid and Solid in the Flow of Liquid in Annulus by CFD Analysis
Authors: Kozdera Michal , Bojko Marian , Drábková Sylva , Kozubková Milada
Published: September 2014

This article is aimed to define the flow in the annulus. The shaft is deposited in a case which has at inlet and outlet recess. The rotor moves in the case. This movement can be divided into the rotation and precession. It is situation where the rotor rotates around own axis and together moves along the circle. The solution of the problem was the initiative in practice where this type of movement occurs in many components, e.g. sliding journal bearings. The fluid flows in the annulus due to the pressure gradient between inlet and outlet and together takes place rotational movement due to movement of the rotor. Between the liquid and the solid of an interaction which results in a change in the forces. The problem is solved by mathematical CFD solver ANSYS Fluent. Based on the characteristics of the problem has been defined corresponding to a mathematical model for the selected types of liquids - VG 32 mineral oil, VG 150 mineral oil and water. Individual variants of used liquids are compared with each other courses of forces acting on the rotor under the same boundary conditions.
Thermal Stress State of Impeller Seal Made ​​from Composite Material
Authors: Vereshchaka Sergej M. , Deineka Andrej V.
Published: September 2014

The stress-strain state of impeller seal made ​​of composite material a centrifugal pump under the thermal effects is investigated based on the classical theory of elasticity of an anisotropic body. Kinematic and static conditions of contact for mating surfaces of adjacent layers are considered ideal. Solution of the problem is obtained in axisymmetric. It is noted that the increase in temperature on the surface of the composite seal has a significant impact on its stress state.
Interaction between Impeller and Axial Diffuser of Mixed Flow Pump
Authors: Varchola Michal , Hlbočan Peter
Published: September 2014

Topic related to an impeller - diffuser hydraulic interaction is important especially in term of energy transformation and performance parameters. A connection of particular functional parts is one of the most important design factors which determine a shape of performance parameters and efficiency. The stated problem is possible to discuss in two possible ways. In term of internal flow pattern and in term of external pump parameters which are represented by performance curve courses. The contribution deals with the influence of the change of the impeller - axial diffuser interaction on quantitative courses of specific energy and efficiency curves.
Numerical Approach for Simulation of Fluid Flow in Torque Flow Pumps
Authors: Krishtop Ihor , German Victor , Gusak Alexander , Lugova Svitlana , Kochevsky Alexey
Published: September 2014

Torque flow pumps are widely used for pumping of fluids with high content of solid and fibrous inclusions and gas bubbles, in particular, for pumping of sewage and wastes. Fluid flow in these pumps is featured with strong vortex patterns, making it difficult to predict reliably their performance curves numerically. The paper is devoted to selection of a numerical approach for simulation of fluid flow in a torque flow pump of “Turo” type and its influence on simulation results. In particular, influence of geometrical configuration of the rotor-stator interface as well as numerical grid fineness is demonstrated. For one geometric configuration, the fluid flow is simulated with different turbulent models, with a steady state as well as transient approach. The simulations were performed using the software product ANSYS CFX. The simulation results are compared with the experimental measurements in the torque flow pump of “Turo” type. The experimental research included probing of fluid flow in three cross-sections of the stator domain, visualizing of streamlines along the rotating and stationary walls, as well as obtaining of performance curves. A good agreement between the numerical and experimental results is obtained as the rotor-stator interface is located at some distance off the rotating parts. Influence of choice of the turbulence model on the simulation results is demonstrated. Conclusions and recommendations are made concerning the choice of initial and boundary conditions, geometrical configuration of the rotor-stator interface, and parameters of turbulence models that affect both the flow pattern in the pump and its performance curves as well as the numerical solution time and required computational resources.
The Application of CFD Methods to Analyse the Flow Structures in the Radial Labyrinth Pump
Authors: Szulc Przemyslaw
Published: September 2014

The radial labyrinth pump consists of two discs: passive and active. Both discs are equipped in special blades with the opposite angle of milling. The passive disc is motionless and the active one rotates around the axis of the pump. On the surface of the connection of two blades belonging to different discs the circulation of fluid, as a type of energy conversion is expected. To investigate the analysed set of discs and take into consideration the impact of some structural changes of the geometry of both discs on a pump performance the numerical simulations were made. In this paper the results of CFD research of the flow in the radial labyrinth pump are presented.
Jet Thermal Compression of the Ammonia-Water Mixture for Heat Pumps and Refrigerating Systems
Authors: Arsenyev Vyacheslav , Kozin Victor , Merzliakov Iurii , Protsenko Mikhail
Published: September 2014

The potential and features of thermotransformer operation has been investigated with the employment of jet thermal compression in heat pump or refrigeration cycles. Jet thermal principle is realized by means of injection and compression of the low-pressure steam with the help of working steam jet. It is formed with the help of relaxation vaporization of the subcooled liquid inside motive flow duct of jet compressor instead of the conventional mechanical compressor. It is a part of the jet thermal compression module which includes a liquid-vapor jet compressor, a separator, a pump and a heater. Perspective of application the ammonia-water mixture as working substance is determined by its high thermodynamic and environmental properties, possibility to maintain higher condensation temperatures than when using CFC, HCFC and HFC chemicals.
Research of Axially Loaded Steel Columns Reinforced under Load
Authors: Zhou Le , Bai Yun Hao , Nie Xiao Mei
Published: September 2014

With the lapse of time, the carrying capacity of early steel structure buildings which affected by various factors in the process of long service has dropped. Meanwhile, the use function of buildings has been asked for a higher level with the improvement of people's living standard. In this case, the assessment and reinforcement on buildings are particularly important. In this paper, the characteristics and mechanical properties of axially loaded steel columns strengthened by welding under load and axially loaded steel columns strengthened by enclosed reinforced concrete under load, the mechanism of steel and concrete work together and the reduction coefficients of steel and concrete of enclosed reinforced concrete have been systemically introduced. To pave the way for the following researches of steel numbers reinforced under load.
Study of Integrity and Interaction of a Non-Buried Marine Subsea Pipeline with Soil
Authors: Muravyeva Liudmila , Vatin Nikolai
Published: September 2014

To study the seismic resistance of subsea pipelines, the following item-wise calculations are made for the following exposures:- determining the seismic hazard of the area;- analysis of pipeline integrity and pipeline-soil interaction;- analysis of soil stability along the pipeline route.Assessment of the stressed state of a vibrating subsea pipeline is related to the need to determine the values and basic dependencies of resistance forces (damping, energy dissipation) when exposed to vibrations. Energy dissipation taking place in case of subsea pipeline vibrations is composed of hydrodynamic resistance losses, losses due to resistance in the structural material of a pipeline (insulation coating, lining, concrete coating, ballast) and losses to the soil through supports.
The Calibration of Parameters in Hardening Soil Model Based Odometer Tests
Authors: Sokolova Olga , Trubina Darya
Published: September 2014

Finite element method is often used to solving composite geotechnical problems. Application of these programs demands special attention for models for the setting parameters and simulation of soil behaviour. The problem of model selection to describe the behaviour of soils for calculation of settlement is considered in test task applied to complex geotechnical conditions of Saint-Petersburg. Comparison of obtained settlement values is carried out in Linear Elastic model, Mohr-Coulomb mode and, Hardening Soil model. The results of calibration of parameters for geotechnical model from the use of the qualities of odometer testing are shown.
The Study of Airdrome Pavement Shrinkage Performance by Using Fly Ash Admixture
Authors: Zhang Shu Ping , Liu Yan
Published: September 2014

In this paper, a new method is proposed to measure the early shrinkage of airport pavement concrete material. Also, the effect of fly ash with different grades and dosage on early shrinkage and late shrinkage deformation of commercial concrete were studied. The effect of fly ash with different grades and dosage on volume stability of commercial concrete was assessed by using the test method of shrinkage cracking, and the causes and mechanism of the effect were analyzed.
Deformation Behavior of Mg-7Gd-5Y-1Nd-0.5Zr Alloy during Hot Compression
Authors: Li Ting , Zhang Kui , Du Zhi Wei , Yuan Jia Wei , Li Xing Gang
Published: September 2014

The hot deformation behavior of Mg-7Gd-5Y-1Nd-0.5Zr alloy was investigated by compression tests at temperatures of 673 K, 713 K, 753 K, and 793 K and strain rates of 0.001 s-1, 0.01 s-1, 0.1 s-1, and 1s-1. The stress-strain curves exhibit typical dynamic recrystallization behavior with a single peak stress followed by a gradual fall toward a steady-state stress. The apparent activation energy of deformation and constitutive equations for the alloy were determined through regression analysis for conventional hyperbolic sine equation. The apparent activation energy of DRX and dynamic kinetics model for alloy were determined using the regression analysis for Avrami equation. Optical microscope and electron backscattered diffraction were employed to investigate the microstructure evolution of Mg-7Gd-5Y-1Nd-0.5Zr alloy during hot compression. The results suggested that the grain boundary is the main nucleation sites of dynamic recrystallization, and (0001) basal fiber texture has formed during hot compression.
Study on the Characteristics of Oval Gear
Authors: Liu Yong Ping , Wang Peng , Xian Xi Long , Zhang Shi Yi
Published: September 2014

For the problem of generating oval gear tooth profile and driving characteristic, desgin the tooth profile of oval gear by the conversion method of tooth profile, and get its three-dimensional modal by Pro/E. The transmission characteristics of a pair of ovate gear are researched; it would help to further study wire cutting of the oval gear based on the involute profile ,which got by the conversion of method of tooth profile, and the driving characteristic help to study other characteristics of oval gear as well as the application in the machinery.
The Analysis of Contact Fatigue Behavior in Ni-Base Single Crystal Superalloy Turbine Blade Rabbet
Authors: Zhou Guo Cai , Pei Hai Qing
Published: September 2014

Based on the dislocation pile-up theory and the crystal plastic theory, a rate-dependent crystallographic plastic finite element method (FEM) was used to analyze the stress distribution in the contact zone of single crystal turbine blade rabbet. The FEM results show that the maximum stress and the maximum resolved shear stress location are in the upper edge of the first tooth contact area of the rabbet. The surface crack initiates in the edge and grows as the zigzag wave. The deflected angle of the plane defined by maximum resolved shear stress gradient direction and the upper edge of the first tooth contact area of the rabbet with respect to the Z axis is 35°. The fracture occurs along the {-1-11} plane. Fracture behavior of rabbet/groove modeling specimens made of nickel-based single crystal superalloys was studied by corresponding contact fatigue experiments. The initial place and developing direction of the fatigue crack observed from experiments are found to be in good agreement with the predicted results based FEM.
Probabilistic Analysis of Intermediate Floor Steel and Wooden Structures in the Old Urban Development Building
Authors: Sokolov Vladimir Alekseevich
Published: September 2014

The article suggests an approach to determine structural elements technical condition, based on the mathematical probabilistic apparatus of technical diagnostics. Diagnostics are performed using probabilistic methods of complex technical systems conditions recognition. Probabilistic parameters are calculated according to Bayes’s rule. The paper shows a diagnostics example of intermediate floor elements and systems in the old urban development building. Both the suggested method and information theory methods are used during diagnostics.
Study on the Amendment Leaf Spring Equivalent Model
Authors: Liu Gao Jun , Zhang Tie Zhu , Zhang Hong Xin , Zhang Lu Zou , Duan Ben Ming
Published: September 2014

Aiming at the processing problem of electric bus leaf spring equivalent model, the amendment leaf spring equivalent processing model is proposed after 3 kind leaf spring equivalent models are studied. This paper makes a comparison between the amendment leaf spring equivalent model and other models. Results show that the amendment leaf spring equivalent model not only considers the longitudinal force and lateral force of the leaf spring, but also avoids emergence the high stress area. So the amendment leaf spring equivalent model is more conform to the actual force situation of the electric bus frame, and it can provide the reliable constraint conditions for the next electric bus lightweight.
A Research on Solar Air Conditioning Technology
Authors: Jin Hong Wen
Published: September 2014

This paper makes qualitative analyses of solar air conditioning systems, demonstrates the feasibility and elaborates on the advantages of solar air conditioning development from the perspectives of environmental protection and energy conservation for the purpose of providing a theoretical basis for the future implementation of the solar air conditioning industry.
Analysis of Nonlinear Local Stability of Curved Cross Section Boom
Authors: Huang Xin Lei , Ji Ai Min , Zhu Ming Juan
Published: September 2014

In order to solve the problems of local stability of telescopic boom of truck crane in practical engineering, considering the initial geometric imperfection and the welding residual stress, the nonlinear local stability analysis of telescopic boom was studied by ANSYS software. APDL command flow was used for controlling the analytical process. Firstly, the foundational theories of the nonlinear finite element method were introduced. Secondly, the influence of the initial geometric imperfection and the welding residual stress on the nonlinear buckling of the boom was studied. Finally, the nonlinear buckling critical stress value of the curved cross section boom for an example was obtained, and it was used to compare with the rectangle, hexagon and dodecagon boom, consequently, a conclusion was drawn that the ability to resist bucking of curved cross section boom was stronger.
Influence of Temperature Variation on Structural Dynamics Characteristics of Wing Model
Authors: Yu Li , Lv Bin Bin , Guo Hong Tao , Yan Yu , Zhang Chang Rong , Luo Jian Guo
Published: September 2014

This paper by taking the hypersonic speed wing surface as the research object, according to the basic theory of thermal mode analysis, calculates and analyzes the influence of temperature variation on model vibration characteristics. According to the analysis, the structural natural vibration characteristics can be influenced by different temperature loads obviously. As for the 7075 root fixed wing surface model under the temperature range of 150K~500K, the basic linearity of frequencies of different order modals decreases with the rise of temperature; The structural frequency decreases sharply with the rise of temperature when the temperature is higher than 500K.
Power Characteristic and Damper Effectiveness Evaluation of Vibration Damper for 1250mm2 Conductor
Authors: Qi Yi , Zhu Kuan Jun , Yin Quan , Gao Yuan
Published: September 2014

Power characteristic and damper effectiveness of the vibration damper for 1250mm2 Conductor is analysed by laboratory test. Resonance frequency, power dissipation and protectable span of the vibration damper are given in the test results, which indicates that power characteristic of the vibration damper meets the requirements of the industry standard and can provide a reference for anti-vibration design of 1250mm2 conductor, and the protectable span of the damper is 141m.
Reliability Assessment for Load Bearing Underframe on Car Body
Authors: Tian Ai Qin , Dong Hao
Published: September 2014

The security assessment of large underframe on car body is proposed through the SINTAP/FITNET method and with the help of numerical simulation technology of finite element based on some EMU powered car in service at present. The security and reliability of the underframe structure is predicted. The defect tolerance that the underframe is ‘fitness for service’ is put forward in this paper. The result shows that the crack shape a/c has little impact on the security with the semielliptic surface cracks assumption. In addition, the security assessment on dangerous areas and critical crack sizes are acquired based on the assumption a/c=0.2. The critical crack sizes of the dangerous area 1, area 2 and area 3 are about 5 to 5.5 millimeters, while the unilateral penetrate crack size of the area 4 reaches 40 millimeters. The structures are suit for service as the risk of brittle failure is extremely small.
Research on the Field Dynamic Balancing Technology and Instrument for a High Speed Cantilever Rotor
Authors: Zhang Zhi Xin , Fu Yu Long , He Shi Zheng , Kuang Ji Yong
Published: September 2014

The principle of balancing a high speed cantilever rotor at full speed has been put forward by low-speed and high-speed balancing. The portable field dynamic balancing instrument based on the microcontroller is discussed from the hardware, the software and the signal process in detail. With the developed instrument, the whole-machine balancing experiment was conducted on a saucer-separating centrifuge RJ-460. The vibration of the saucer-separating centrifuge decreased from 3.8mm/s to 0.3mm/s at 1200r/min and decreased from 9.8mm/s to 0.6mm/s at 7200r/min. The experimental results indicated that the principle of balance is correct and the designed instrument is reliable and promising.
Structure Strength Analysis of Light Truck Cab Based on Tilting Mechanism
Authors: Ding Fang
Published: September 2014

Based on the cracking phenomenon of the floor of the light truck cab, white body finite element model of a light-truck cab is established, with which computational and experimental modal calculations and analysis are conducted.Through the force relationship between tilting mechanism and the cab, the structure strength analysis of the main components of the cab is carried out, the weakness or the position of the components of the cab is found, which Provide a reliable basis for improving the structure of the tilting mechanism or the cab.
The Analysis and Diagnosis of Vibration Fault of a Certain Type of Aero-Engine
Authors: Liu Yan Fei , Wang Qi Wei , Wang Shu Yun , Zhang Shuang , Cao Jia Ming , Zhou Chao Ji
Published: September 2014

The turbofan double-rotor engine with afterburner, as a certain type of aero-engine, often presents itself with vibration fault problems in the process of trialing run in the ground text and installed the work process of state, which will affect test the factory qualified rate and the flight mission seriously. In this paper, we mainly adopt the order analysis method to find out the reasons of the engine's vibration hazard from its vibration signal, and then make pertinence measures to solve vibration fault problems, which are combined with vibration test and analysis system of the ground text in the process of actual application. The results of the paper analyze the problem of engine vibration fault effectively and reduce the incidence of engine vibration fault, So as to increase the qualified rate of the engine in the ground test.
Thin Film Geometry Design for Flapping Rotor Wing
Authors: Lu Jing , Hang Yan Fang , Hu Ying Jun
Published: September 2014

The shape of thin film for flapping rotor wing has a significant impact on aerodynamics. To increase lift, we designed 7 different flexible film wings. Then we compared the aerodynamic force of thin film in accordance with the same aspect ratio of different shapes and the same shape of different aspect ratio. The conclusions suitable for the thin film design guide are obtained. The aspect ratio of thin film for flapping rotor wing is inversely proportional to the aerodynamic force. At the same aspect ratio, the film wing designed by bionic is superior to other shapes. With the aspect ratio increases, the thrust of the film wing designed by bionic decreases faster than the lift.
Enhanced H2 Sensing of SnO2 Nanowires Functionalized with Pt and Pd Catalyst Nanoparticles
Authors: Shen Yan Bai , Zhang Bao Qing , Cao Xian Min , Wei De Zhou , Jia Li Jun
Published: September 2014

SnO2 nanowires with a tetragonal structure were synthesized by thermal evaporation of tin grains at 900 °C. The obtained SnO2 nanowires were doped with Pt and Pd. The morphology, crystal structure, and H2 sensing properties of undoped, Pt-doped, and Pd-doped SnO2 nanowires were investigated. SnO2 nanowires were approximately 30–200 nm in diameter and several tens of micrometers in length. Gas sensors based on undoped, Pt-doped, and Pd-doped SnO2 nanowires showed a reversible response to H2 at an operating temperature of RT–300 °C. The response was improved in the order undoped < Pt-doped < Pd-doped SnO2 nanowire sensors under the same conditions. The highest response upon exposure to 1000 ppm H2 was 252.9 at 100 °C for Pd-doped SnO2 nanowire sensor. The results demonstrated that impurity doping improved the sensor response and lowered the operating temperature at which the sensor response was maximized.
Numerical Simulation and Cold Model Experiments on Ladle Furnace by Ultrasonic
Authors: Kang Shu Mei , Shen Ming Gang
Published: September 2014

The effect of power and radiation time on inclusion removal was studied in the ladle refining cold model by using organic particles to imitate inclusion. We simulate ultrasonic agitation in the ladle refining model by programming user-defined functions with the FLUENT computational fluid dynamics software. Results show that a large negative-pressure zone is observed in the liquid of the dynamic boundary during the first time step. During the second time step, the liquid at the bottom of the model has a large positive pressure area. Inclusions in the molten steel should be removed through pressure change to improve the purification effects of liquid steel. As the power increases, the absolute value of negative pressure increases.
Study on Oxidation Behavior of Stainless Steels in Short Time
Authors: Cheng Xia Wei , Jiang Zheng Yi , Luo Guang Zheng , Wei Dong Bin , Hao Liang
Published: September 2014

The various chemical compositions of stainless steels can result in complication of the formation of oxide scales in hot rolling process. The time for formation of tertiary oxide scale during finishing rolling is short. In the present study, the oxidation tests with short time period were carried out on eight stainless steel grades by Gleeble 3500 thermal mechanical simulator in a simulated water mist environment. Multi-layers of oxide scale have been developed on all the steel grades during short time oxidation. Internal and intergranular oxides were formed in the steel matrix underneath the inner spinel oxide layer. The cross section of the oxide scales were examined and measured by SEM to understand the oxide scale cross section morphology and thickness.
Comparison Study on the Corrosion Resistance of Stainless Steel and Copper Tubes in LiBr Solution in Heat Pump
Authors: Liu Shi Hong , Liang Lei , Zhang Jian Liang , Zhao Yang
Published: September 2014

Cooling water surplus heat utilization by lithium bromide absorption heat pump is a significant measure of energy saving in thermal power plants, however, lithium bromide corrosion on tubes seriously affects the reliability of heat pump absorbers. Through weight loss methods and electrochemical polarization methods, corrosion resistance of copper tube and five types of stainless steel tubes 304,316 L,436L,444 and 445J2 have been studied under absorber conditions. The results reveal that the corrosion resistance of five types of stainless steel tubes is significantly better than copper tubes in 62wt-% LiBr solution, and the corrosion resistance of the order of tubes is 316L>445J2≈444>304≈436L>>TP2. Inhibition effect of lithium molybdate is a little better than sodium molybdate at the same weight concentration.
Synthesis, Characterization and Anticorrosion Performances Study of Different Acid Doping Polyaniline
Authors: Wang Hong , Huang En Long , Gong Min , Liu Di , Wang Long
Published: September 2014

Different polyaniline micro/nanostructures were prepared in by oxidative polymerization doped with different acids like citric acid (C6H8O7), H3PO4 and HCl. The samples were characterized by Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM) and UV–Visible spectral techniques. The rod-like composites, microspheres and nanofiber of polyaniline could be synthesized by different doting. The corrosion studies were carried out on steel plates coated with epoxy coatings containing polyaniline prepared with acid doping and no acid doing. Corrosion protection of these epoxy coatings containing prepared polyaniline (PANI) on steel was studied by Tafel polarization test in 3.5wt% sodium chloride (NaCl) aqueous solution. The results indicated that coatings prepared from acid doped polyaniline particles were found to exhibit excellent corrosion resistance much superior to no acid doped PANI in aggressive environments, and the epoxy coating containing PANI obtained in HCl doping had the best performance of the corrosion protection in all systems under investigation. The possible protective mechanism of PANI was discussed.
Research Progress of the Polyurethane-nTiO2 Self-Cleaning Coating
Authors: Wang Lin , Shang Yi , Xiao Xia , Mu Bo , Zhang Guang Wen
Published: September 2014

Self-cleaning coatings are getting tremendous attention from both the academic interest and industrial communities. Among the two kinks of self-cleaning coatings, which are super-hydrophobic and super-hydrophilic coatings, the super-hydrophilic self-cleaning coating comprised of TiO2/doped-TiO2has four unique features when exposed to ultraviolet (UV) light or sunlight, which are self-cleaning property, anti-bacterial properties, environmental friendly, and visible-light photocatalysts and indoor usage. And PU-TiO2self-cleaning coating produced by “grafting” method, which can accomplish stable chemical attachment between the nTiO2and the PU substrates, may potentially show an increase of the thermal properties, an increase of the amount of active sites for photo-catalysis, and a decrease in the self-degradation of the resulting polymer nanocomposite than the traditional mechanical shear method. There is a tremendous scope for the application of polyurethane-nTiO2self-cleaning coatings in industrial, health care and consumer sectors.
Numerical Studies to Signal Characteristics with the Metal Magnetic Memory-Effect Based of Cast Iron
Authors: Peng Yi Bo , Pan Shang Feng , Lu Chao
Published: September 2014

HT300 (Cast Iron) is widely used in heavy machines, and the metal magnetic memory (MMM) technique can is used to evaluate early damage of the following metal while calculating the stress concentration. An experimental investigation of the effect of stress on permeability of HT300 has been undertaken on cast iron. The result showed that the stress can alter the permeability of the material which will amplify the magnetic field of the specimen. Further, simulation was used to evaluate the characteristics of magnetic signal under different conditions. The present work indicate that the MMM can detect stress concentration and early stage of damage effectively.
Study of Annealing on Fluorescent Derivatives
Authors: Liu Yong , Dai Yu Mei , Hu Xiao Dan
Published: September 2014

The work introduces the spectra of fluorescent derivatives which have been annealed. It’s usually unstable when heated or electrified, showing the red-shift and emerging new emission peak. We analyze the connection between emission peak and temperature. OF3R4, OF3R6, OF4R4, which are characterized by NMR. By contract, different temperatures and materials have similar phenomenon.
Hydrothermal Synthesis, Photoluminescence and Room Temperature Ferromagnetism of Co-Doped Rod-Like ZnO Particles
Authors: Hang Lian Mao , Zhang Zhi Yong
Published: September 2014

Co-doped rod-like ZnO particles with nominal Co doping concentration of 1 at% were synthesized by hydrothermal method and characterized by X-ray diffraction, field-emission scanning electron microscopy, photoluminescence and superconducting quantum interference device. The results show that the as-synthesized samples are pure hexagonal wurtzite structure without metallic Co or other secondary phases and display rod-like shape with smooth surface. The room temperature PL spectrum of the Co-doped rod-like ZnO particles exhibits a strong blue emission at 440 nm, a shoulder violet emission at 410 nm and a weak green emission centered at 550 nm. The magnetization measurements reveal that the Co-doped rod-like ZnO particles show ferromagnetic behavior at room temperature. The saturation magnetization and coercive field are 0.0125 emu/g and 45 Oe, respectively.
Synthesis and Luminescence Properties of Na3YSi2O7:Sm3+, Eu3+ Phosphor
Authors: Sun Jia Yue , Han Liu , Di Qiu Mei , Xu Qi Guang
Published: September 2014

Novel Na3YSi2O7: Sm3+, Eu3+phosphors for white light-emitting diodes were prepared by high-temperature solid-state reaction. The photoluminescence excitation and emission spectra, energy transfer from Eu2+to Tb3+are investigated in detail. The current research suggests that Na3YSi2O7: Sm3+, Eu3+phosphor is a potential candidate for application in Phosphor-converted LEDs.
Synthesis and Properties of Naphthalimides Schiff Base Fluorescent Probe for Ag+
Authors: Liu Jing , Yuan Wei , Mi Cheng , Li Chen Chen
Published: September 2014

A novel naphthalimides schiff base fluorescent probe and polymeric fluorescent probe for Ag+ ions were synthesied by using cheap and commercially available of 1,8 naphthalene anhydride, vanillin, N,N-dimethyl-propane diamine and hydrazine hydrate as raw material. Their spectral characteristics and fluorescent sensing of metal ions in aqueous were studied. The results indicate that the fluorescent probes sythesized showed good water-soluble and stability, high detection sensitivity selectivity to Ag+, linear relationship between the fluorescent intensity and concentration of Ag+ is in the range of 9.9 × 10-6 ~ 9.9 × 10-5 mol/L.
Size Effects of Heat Conduction for Silicon Nanograins
Authors: Han Ya Fen , Liu Hai Dong
Published: September 2014

The structure model of silicon nanograins was built. And then based the modification of the mean free path of phonons according to the size of nanograins, the expression of thermal conductivity in nanograins was obtained according to the phonon kinetic theory. The dependence of the thermal conductivity of silicon nanograins on size was investigated. The results showed that thermal conductivity of nanograins decrease with the reduction of characteristic sizes when the characteristic sizes of nanograins are comparable to or smaller than the phonon mean free path.
Hydrothermal Synthesis of SrSO4:Eu2+ Microcrystals with Different Morphologies and its Luminescence Properties
Authors: Sun Jia Yue , Di Qiu Mei , Han Liu , Xu Qi Guang , Ma Chen Liang
Published: September 2014

Electron trapping materials SrSO4:Eu2+were prepared by hydrothermal method from fatty alcohol polyoxyethylene (3) ether (AEO-3) aqueous solution at 200 °C for 20 h. The phase structure, microstructure and optical properties were characterized with X-ray diffraction (XRD), scanning electron microscopy (SEM) and excitation-emission spectroscopy (PL-PLE), respectively.
Ceramic Product Design Based on 3D Printing Technology
Authors: Dong Cui
Published: September 2014

With the development of information technology, 3D printing technology, which is called the symbol of the third industrial revolution and characterized by digitalization, artificial intelligence and new materials application, has brought a revolutionary reform to the future product manufacture. On the basis of the application of 3D printing technology to the ceramic product design, an introduction to the working principle of 3D printing technology and the advantages of its application to the ceramic product design is made, and the influence of 3D printing technology development on the ceramic product design is discussed from four aspects, including design ideas, design models, ceramics designers and product development modes, finally together with a further analysis of the limitations as well as the prospects of the application of 3D printing technology to the ceramic product design.
Viscosity of Al2O3 Nanoparticles Dispersed in Ethylene Glycol
Authors: Lou Bin , Xu Xu , Wang Wen Long
Published: September 2014

In this paper, experimental work has been performed to study the influence of temperature and particle volume fraction on the viscosity of aluminum oxide (Al2O3)-ethylene glycol nanofluids. Nanofluids with particle volume fraction at 1%-4% were examined. Viscosity experiments were carried out at 20°C-60°C. The results show that the viscosity increases as the particle volume fraction increasing, but decreases with an increasing of temperature. It is found that the relative viscosity is independent of temperature for a particular particle concentration, and independent of particle volume fraction at a certain temperature. Furthermore, formula of Chen was verified appropriately, and a correlation was proposed for computing relative viscosity.
Experimental Research on Medium Leakage of CFRP Laminates after Impact
Authors: Zhang A Ying , Zhang Dong Xing
Published: September 2014

The effects of thickness and impact energy on the medium leakage of composite laminates were discussed in this paper. Impact tests for the composite laminates with the size of 600 mm×700 mm with three different thicknesses were subjected to impact energy levels from 5 J to 40 J. The medium leakage and the damaged area were investigated according to different energy levels and stacking sequences. The damage area was evaluated by visual inspection and three-dimensional microscope. The experimental results reveal that the impact damage of CFRP laminates with three different thicknesses tends to be more severe as impact energy increases. The impact area and the crater depth increases with increasing impact energy. The impact area and the crater depth decreases with increasing thickness for the same impact energy.
Experimental Study of a Certain Type of Aircraft Structure Repair Adhesive
Authors: Huang Yang , Tian Ling
Published: September 2014

Based on a certain type of aircraft structure repair adhesive was studied, the curing temperature of aircraft structure repair commonly used adhesive process of high, long curing time, curing thermal stress problem, with epoxy resin as basic material, by adding elastic toughening Ding Jin g rubber, curing agent and silane coupling agent modification on Toughening of epoxy resin. The mechanical properties of adhesive were analyzed through the cyclic loading test and tensile shear test, and the best ratio of modified epoxy resin adhesive. The adhesive prepared at 80 °C for 90 min after curing shear strength can reach 35MPa, which can meet the aircraft structure damage daily emergency repair requirements.
Influence of MgO Coating Layer on Properties of MgO-CaO Refractories
Authors: Guo Zheng , Liu Bai Kuan , Tian Xiao Li
Published: September 2014

High-calcium MgO-CaO refractories were prepared using light burned dolomite as the main starting material, high activity MgO powders from magnesite decomposition products as the additive, to study the influence of high activity MgO powders on the sintering behavior and hydration resistance of MgO-CaO refractories. Then the mineral phases were analyzed by X-ray diffraction (XRD) and the crystal bonding mechanism was analyzed by scanning electron microscopy (SEM). The results show that: 1) The sintering properties of MgO-CaO materials were effectively improved and the sintering temperature was reduced. 2) The high activity MgO powders formed coating layers on the surface of CaO grains, which can effectively reduce the hydration effect of CaO. Thus the hydration resistance of MgO-CaO refractories was improved.
Research in New Technologies and New Materials in the Sports Industry
Authors: Bai Shu Yan
Published: September 2014

Science and technology are the products of human understanding and the remaking of nature. Technological innovation is an important way for a country or an industry to achieve better development. Nanotechnology, representative of new materials technology in general, has permeated every aspect of our lives, and plays an especially important role in competitive sports. With this rapid development of new technologies and materials foremost in mind, this paper describes the application of new technologies and new materials in the sports industry.Science and technology are primary productive forces. In modern society, technological innovation permeates every aspect of human life, and is closely related to the quality of life of modern people. In addition, spectator sports, competitive sports, sports science and technology, R&D (research and development) and innovation in general are also invariably affected, particularly by the rapid development of new technology materials.
Thermal Behavior, Mechanical Property and Microstructure of Low-Density Polyethylene Filled by Diatomite
Authors: Wang Kun Yuan , Sun Qiu Ju , Liu Yan , Lu Jie
Published: September 2014

Diatomite was treated by titanate coupling agent and blended with low-density polyethylene (LDPE) by the method of melt-mixing blend. The performance of the blends, such as thermal behavior, mechanical property and microstructure, were analyzed with differential scanning calorimetry, thermo-gravimetric analysis, tensile strength testing and scanning electron microscopy. The results showed that influenced the crystalline behavior of LDPE phase in the blends and made the crystallization rate of LDPE phase decreased. Moreover, the thermo-decomposing temperature of the blends increased with increasing the diatomite content, diatomite significantly improved the thermal stability of the blends. Tensile strengths of the blends firstly decreased and then increased. When the diatomite content was 30%wt, the tensile strength of the blend reached to 14.6MPa. SEM photographs showed the good dispersion and interaction.
Constitutive Equation for Elevated Temperature Flow Behavior of Fe-Cr-Ni Preform Reinforced Al-Si-Cu-Ni-Mg Aluminum Composite
Authors: Zhou Ling Zhan , Yang Li Ming , Peng Yin Jiang , Zhu Xiu Rong
Published: September 2014

In this paper, squeeze casting process was adopted to produce the Fe-Cr-Ni preform reinforced Al-Si-Cu-Ni-Mg aluminum composite. And then, T6 heat treatment was conducted to enhance the composite’s performance. After which, isothermal compression tests in temperature range of 473-773 K at an interval of 150 K and strain rate range from 0.001 to 10 s-1 were carried out on Gleeble 3500 thermo-mechanical simulation machine. It is found that, for a specific strain rate, the flow stress decreases markedly with temperature increases. And for a fixed temperature, the flow stress generally increases as the strain rate increases. Based on the experimental true stress-true strain data, the Arrhenius type model was established.
Double Face with Pattern Effect Design of Thermal Jacquard Based on Three-Layer Weave Structure
Authors: Jin Zi Min , Xu Jun Qing , Wu Jian Hua , Yan Yu Xiu
Published: September 2014

In order to weave the double face jacquard fabric with pattern effect at the same time increasing warming function of the jacquard, this paper added far infrared polyester as extra weft to stitch the face and back layers. Combining the basic structure design of the double face jacquard fabric, three-layer weave with extra weft stitching could be done. By this method extra weft could be hidden in the form of surface layer floats covering stitching intersection points so as to have heat retention effect and unique appearance of reversible jacquard isn’t impacted. In addition, the weft yarns used to produce the face and back layers were silk and wool, and far infrared polyester was hidden in the inside of the fabric as extra weft which ensured the jacquard being good for skin. Empirical results show that the method achieves good decorative property and warming function of the double face jacquard fabric with pattern effect, and provides reference and direction for the design of digital jacquard fabric.
Study on Static and Dynamic Pattern Transformation Glowing Optic Fiber Scene-Like Jacquard Wall-Mounted Fabrics
Authors: Xu Jing Na , Jin Zi Min , Qi Yi Na , Sun Zhong Wen , Wang Xue Qin
Published: September 2014

In order to make the jacquard fiber hanging fabric to achieve static and dynamic design gradually transform shining shows at the same time, we adopt the interweaves of optical fibers and common yams. By designing six double weft fabric structure of four groups of optical fibers and two groups of common yarns, some functions like “image overlying”, “colour replacing” and “protecting colour” in weave CAD are used in order to overlie the drafting of a static shining pattern formed with 2 sets of optical fiber, a transform shining pattern composed of 2 sets of optical fiber and a scene-like decorative pattern formed with a set of conventional weft. Then notation file is prepared by designing the weft row, main paper clip, assistant needle and sample card. Next, use jacquard weaving machine to make 6 double weft optical fiber jacquard fabric. Finally, by the utilization of the light of LED , the design of electronic circuit,to get a pattern can be controlled shining, static and dynamic display of optical fiber as wall-mounted scene jacquard fabric.
The Research for the Properties of the Outlast/Viscose Blended Yarns
Authors: Jin Rui Peng , Jin Zi Min , Wang Xue Qin , Yan Yu Xiu , Tao Jian Wei
Published: September 2014

Outlast fiber is a kind of thermostat fiber that could absorb and release heat according to the changed environment temperature. It has been widely used in thermostat textiles. The outlast/viscose blended yarn we researched in this paper will be used in apparel fabric. As the demand in durability and comfort property of apparel fabric, we characterized the yarn by regain, tensile and damage properties, elastic property, differential scanning calorimetry (DSC) and thermo gravimetric analysis (TGA). The experiment results show that the outlast/viscose blended yarns have good hydroscopicity, elastic property, temperature adjusting performance and thermal stability.
Characterization and Hydrolization of Acetate Fiber by Sodium Hydroxide
Authors: Hu Xue Min
Published: September 2014

Acetate fiber arouses a great interest by the people with a soft silk feel, bright color, weather resistant and good drapability. Acetate fiber is obtained by reacting cellulose with glacial acetic acid in the presence of acetic anhydride a trace of sulfuric acid in refluxing methylene chloride. The ester group (-COO-) in acetate fiber is converted to hydroxyl group (–OH) after hydrolysis in sodium hydroxide aqueous solution. This research explores the hydrolization of acetate fiber in sodium hydroxide solution and characterization used staining method with reactive dyes. The optimum technology of hydrolysis is sodium hydroxide mass fraction is 6g/L, the time of hydrolysis is 30min at the room temperature. The strength of the hydrolyzed fiber is decline and the moisture regain is increased compared with the acetate fiber.