bluuebunny/crossref_metadata_2025 huggingface dataset:
Finite Element Model Analysis of 3-D Angle-Interlock Woven Composite under Quasi-Static Tensile Loading
Authors: Hu Hang Jun , Jin Li Min , Sun Bao Zhong
Published: December 2012

The tensile response of three-dimensional angle-interlock woven composite (3DAWC) under quasi-static loading was investigated in experimental and finite element model (FEM) analysis. The FEM analysis was based on micro-structure at yarn level and connected with commercial FEM software ABAQUS/Explicit (ver. 6.10) to calculate the tensile property under quasi-static loading. The experimental and FEM stress-strain results were compared. Good agreement proved that the FEM method based on micro-structure was reasonable and effective and could be used to design 3-D woven structural composite.
Spectral Element Model for the PZT-Bonded Laminated Composite Beams
Authors: Lee Usik , Park Il Wook , Jang In Joon
Published: December 2012

This paper presents a spectral element model for the laminated composite beams with a surface-bonded PZT layer. The spectral element model represented by exact dynamic stiffness matrix is derived in the frequency-domain by using the frequency-dependent dynamic shape functions which are formulated from the free wave solutions satisfying the governing differential equations transformed into the frequency-domain by using the DFT theory. The performance of the present spectral element model is then evaluated by comparing its solutions with those obtained by using the conventional finite element model
Study on UV Curable Waterborne Polyurethane Modified by Epoxy Resin
Authors: Li Wen Yuan , Cao You Ming , Zhou Xin Qi
Published: December 2012

In this paper, UV curable waterborne polyurethane emulsions were prepared by fractional step method using toluene diisocyanate (TDI), polyethylene glycol (PEG, MW=1000), α,α-dimethylol propionic acid (DMPA), 2-hydroxyethyl methacrylate (HEMA) as raw material, and UV-WPUs were modified with epoxy resin. The effect of different content of epoxy resin on the viscosity, the water resistance, and other properties was investigated. The synthesized polyurethane structure was confirmed by the Fourier transform infrared spectroscopy (FTIR). The FTIR analysis identified that the target product was expected epoxy modified waterborne UV polyurethane. And with –COOH content increasing, the emulsion viscosity of the WPU increased and the water absorption of the films increased; with epoxy content increasing, the viscosity of the WPU emulsion increased and the water resistance of the films was improved.
Inhibition Effect of Sodium Molybdate on Friction Stir Weld of 5083 in Aqueous Solution
Authors: Shen Chang Bin
Published: December 2012

Similar welds composed of 5083 were produced by friction stir welding. In the solution of 0.2 M NaHSO3 and 0.6 M NaCl, the electrochemical corrosion behaviors of the friction stir welds (FSW) and 5083 were comparatively investigated by static weight loss experiments and potentiodynamic polarization curve tests at the ambient temperature. The results indicated that the average corrosion rate of the weld was less than that of 5083. Then, sodium molybdate was added to the corrosive solution and its effect on the corrosion behaviors of the weld and parent metal was comparatively assessed. The inhibition efficiency (IE) for the weld was beyond that for 5083 base materials, sodium molybdate may be thought of as an effective inhibitor.
Experimental Study on Measurement Accuracy of Prediction Index K1 for Rock Crosscut Coal Uncovering
Authors: Chen Yu Jia , Jiang Cheng Lin
Published: December 2012

Coal and gas outbursts are a kind of dynamic phenomena seriously threatening subsurface mining safety in coal mines. A precise prediction of outburst hazard in rock crosscut coal uncovering directly depends on whether or not its prediction index can be accurately determined. Measurement uncertainty reflects the degree of uncertainty of a measured result. In this paper, the authors studied the sources of measurement uncertainty of prediction index K1 for rock crosscut coal uncovering outburst hazard, built corresponding mathematical model and carried out a great number of laboratory experiments to evaluate the measurement uncertainty of the prediction index K1 . At a confidence probability of 95%, the expanded uncertainty of the index K1 is obtained to be 33.3%, far greater than 5% allowed in engineering. To analyze the uncertainty sources, a table of uncertainty components of index K1 was made, and it’s found through analysis that the mass of desorbed coal sample and the accuracy of pressure sensor are the main factors inducing measurement uncertainty in determination of index K1 , and corresponding improvement measures were put forward to create conditions for using this index to accurately predict rock crosscut coal uncovering outburst hazard.
Research on Debonding Damage of Adhesive-Bonded Composite Integrated Structure
Authors: Yuan Guo Qing , Chen Zhen Xing
Published: December 2012

Adhesive-bonded composite integrated structures (ACIS) are widely used in civil and military aircrafts now. The failure laws of such structures should be studied obligatorily to design them reasonably. In a composite wing-box test debonding damage was found at the connection between the skin and the wall in mechanical-joint region while the load was added up to certain magnitude. However the shear stress of the adhesive layer in plane was not high. The real reason of the damage is that there is significant out-plane normal tensile stress at the local place. The main factors, which induced out-of-plane normal tensile stress, include out-of-plane force resulting from changing of force transfer path and sudden change stiffness. In this paper an integrated composite I-beam is investigated to expound the existing objectively of out-of-plane force, and analyze the relationships between out-of-plane force, sudden change stiffness and out-plane normal tensile stress or peeling stress. Research indicates that the out-of-plane force and debonding damage resulted from it should be highly valued for ACIS in mechanical-joint region.
Detection System for Scratch on the Wheel Tread of Train Based on PSD
Authors: He Ping , Li Ying , Guo Yuan , Li Pan
Published: December 2012

At present, scratch on the wheel tread of train is detected mostly in low-speed circumstance in China. For this reason, a high-precision detection system for scratch on the wheel tread of train based on PSD which adapts to high-speed moving train is presented. Firstly, the principle of scratch detection based on PSD is given. Then, the acquisition and computing system for scratch on the wheel tread of train based on PSD is designed with TMS320F2812. Finally, the human-computer interaction system based on Visual Studio 6.0 is designed. The results show that the detection system for scratch on the wheel tread of train based on PSD can realize detection for scratch on the wheel tread of train and have advantages of high precision, high efficiency, high reliability and well human-machine interface.
A Study on Failure of Welded Lap Joints in Alloy 718
Authors: Choi Ji Ung , Cho Woo Hyun , Yoon Jong Hoon , Yoo Joon Tae , Lee Ho Sung
Published: December 2012

It is well known that alloy 718 shows excellent mechanical strength and corrosion resistance and this alloy is now successfully utilized for aerospace and oil industry application. In order to design and manufacture components to satisfy the design requirements of the applied system, it is necessary to consider formability and weldability of the material. This paper provides experimental results of lap shear strength of welded specimens of alloy 718 with EBW(Electron Beam Welding) and LBW(Laser Beam Welding) and Brazing. The purpose is to determine the optimum welding method for overlap welding of alloy 718 for blow forming.
An Analytical Modeling for Effective Thermal Conductivity of Multi-Phase Transversely Isotropic Fiberous Composites Using Generalized Self-Consistent Method
Authors: Hassan Syed Aadil , Ahmed Hassaan , Israr Asif
Published: December 2012

In this paper a theoretical relationship for the effective thermal conductivity of a multiphase transversely isotropic composite system is obtained. The Generalized Self-Consistent Method and simple energy balance principle is employed to derive a more appropriate model. In the derivation, it is assumed that the orientation of fiber within the transversely isotropic composite system is unidirectional and surrounded by two different phases of porous and matrix phase. A combined effect of these three different phases on the effective thermal conductivity of the composite system in transverse direction is studied. The effect of the interfacial contact conductance between the fibers and porous medium is also considered. Results of effective thermal conductivity are plotted against volume fraction and conductance which shows extremely good agreement.
Several Models for Piezoelectric Composites
Authors: Dou Rong Yang , Huang Zhi Xiong , Chen Zhuo , Dai Jing , Shi Min Xian
Published: December 2012

This paper introduces several models for different piezoelectric composites with the modeling process and mechanism. In order to characterize the uniformity and stability, the volume density of particles and fibers changed with volume is studied. The models generated by ANSYS finite analysis are showed, which the codes are produced by the models.
3-D Elastic-Plastic Constitutive Relationship of Mixed Hardening
Authors: Wu Ze Yu , Bai Xin Li , Ma Bing
Published: December 2012

In finite element calculation of plastic mechanics, isotropic hardening model, kinematic hardening model and mixed hardening model have their advantages and disadvantages as well as applicability area. In this paper, by use of the tensor analysis method and mixed hardening theory in plastic mechanics, the constitutive relation of 3-D mixed hardening problem is derived in detail based on the plane mixed hardening. Numerical results show that, the proposed 3-D mixed hardening constitutive relation agrees well with the test results in existing references, and can be used in the 3-D elastic-plastic finite element analysis.
Sintering Characteristics of Micro-Zn Paste Containing Sn-3.0Ag-0.5Cu Nanoparticles
Authors: Chee Sang Soo , Lee Jong Hyun
Published: December 2012

The transient liquid-phase sintering behavior of micro-Zn/nano-Sn-3.0Ag-0.5Cu (SAC) pastes was examined at a temperature of 190 °C as a function of the volume of ultrafine (~12.4 nm) SAC nanoparticles present. SAC nanoparticles have lower melting point drop than the bulk SAC particles. Although successful linkage at the interface between all Zn particles was not accomplished in all sintered samples, the number of linkages increased marginally with a decrease in the SAC content. As a result, the electrical resistivity of the sintered samples decreased with the decrease in the SAC content; however, the resistivities were still very high in all samples. Microstructural observations indicated that the observed results were mainly due to the short lifespan of the liquid phase caused by the coarsening of SAC nanoparticles during heating.
Temperature Drift Compensation Algorithm Based on BP and GA in Quartzes Flexible Accelerometer
Authors: Li Xue Fei , Li Deng Hua , Gao Jing Min , Pang Mei Sa
Published: December 2012

For the purpose of reducing the drift of the Quartzes Flexible accelerometer outputs in different temperatures, an improved BP algorithm based on GA (Genetic Algorithm) for temperature drift compensation of Quartzes Flexible accelerometer is studied in this paper. Based on the theory analysis and the simulation, the GA model has less training steps and better fitting precision compared with BP Neural Network. The results show that this method on temperature drift compensation of quartz flexible accelerometer has achieved good effect.
Influence of Nanostructured Fibers on Properties of Building Composites
Authors: Makarova Natalya Valentinovna , Pogodaev Vasiliy Petrovich , Pogodaev Anton Vasilyevich , Kozin Andrey Vladimirovich , Lipovoy Aleksey Sergeevich
Published: December 2012

Currently, interest in nanotechnology concept for cement composites is steadily growing. Results of investigations of the concrete surface, reinforced with nanostructured mineral fibers by using atomic force microscopy (AFM) and dynamic ultra-micro hardness tester (DUMHT) of the specific areas of surface are presented. For comparison plain concrete and concrete with addition of single mineral fibers investigated as well. The analysis of the obtained data has shown that as a result of the directed microdisperse structurization provided by nanoinitiators on a surface of fibers, increase strength and deformation characteristics of a material. The main objective of this paper is to research the mechanisms of pattern formation surface of the concrete contained the High-modulus basalt microfiber (HMBMF) as a solid carrier for nanoparticles.
Research on the Pressure-Measuring Uncertainty of Standard Copper-Cylinder
Authors: Li Li Ping , Kong De Ren , Wang Fang , Yang Li Xia , Zhao Chuan Rong
Published: December 2012

This article introduces the method of selection and related criterion of standard copper-cylinder, and systematically analyzes five factors that affect the measuring uncertainty of standard copper-cylinder: primary pressure standard, height measuring of copper-cylinder, and inconsistent individual deformation of standard copper-cylinder, inconsistent pressure sensitivity and the influence of temperature. According to usage characteristics and selection methods of the standard copper-cylinder, discusses computing method of components of the measurement uncertainty and models measuring uncertainty of standard copper-cylinder. The model can quantitatively calculate through experimental data of selection, which lay a theoretical foundation for the control of the pressure measuring uncertainty of standard copper-cylinder.
“Internal” Resistivity and Quantum Efficiency in Organic/Hybrid Solar Cells
Authors: Kwok H.L.
Published: December 2012

Quantum efficiency of organic/hybrid solar cells has improved appreciably in recent years and it is useful to re-examine those parameters that reflect the device properties. This is important when there is need to distinguish between improvements associated with materials properties such as domain size and phase separations and improvements linked to external effect such as the inclusion of field enhancement layers. In this work, we reported the evaluation of the “internal” resistivity found in high performance organic/hybrid solar cells based on data reported in the literature. Our observations suggest that in general better device performance is found in devices with higher “internal” resistivity. This includes the case when a hole blocking layer is added. Exceptions to such a rule can be found in solar cells with nanowires in the n-layer and ferroelectric end layers whereby the quantum efficiencies increase beyond the values expected. A simple mathematical model has been put forward to explain the dependence of quantum efficiency on the “internal” resistivity. Overall, lowering of the “internal” resistivity correlates well with degradation in the device performance and can be put in the context of a reduction in the effective diffusion length of the photo-excited carriers. High field and polarization effects by themselves do not affect the “Internal” resistivity.
Directional Agglomeration with Quadtree Based Coarsening for 2D Anisotropic Unstructured Grids
Authors: Li Zong Zhe , Wang Zheng Hua , Cao Wei , Yao Lu
Published: December 2012

This paper develops an automatic nested agglomeration methodology for 2D multigrid flow solutions over anisotropic unstructured grids. The algorithm combines isotropic quadtree based coarsening and anisotropic directional agglomeration method to yield a desired coarsening ratio and high quality of coarse grids, which works on cell-centered finite volume scheme. This coarsening strategy developed is presented on an unstructured grid over the RAE2822 airfoil. It is shown that the present method provides more suitable coarsening ratio and aspect ratio at all coarse grid levels than only quadtree based coarsening method.
Design Technologies of Eddy Current Retarder Used in an Automobile
Authors: Liu Cheng Ye , Shen Jian Ming
Published: December 2012

Auxiliary brake sets had been widely used for heavy duty trucks and advanced buses. They played a role of split-flow braking load of main brake system. As one of auxiliary brake sets eddy current retarder had good braking performance and braking stability, and it is automotive and maintain constant speed by its continual braking. In this paper, key technologies of eddy current retarder, such as braking torque, working volt and current, magnetic circuit, material of rotor plate and iron, heat dissipation performance of rotor plate, match between eddy current retarded and automobile, and effect of temperature rise on its braking performance were presented and discussed in detail. Meanwhile, advantage and disadvantage of eddy current retarder were analyzed.
Study of a Low Insertion Loss SAW Filter with SPUDT Structure Using YZ-LiNbO3
Authors: Jiang Hua , Lu Wen Ke , Shen Shi Gen , Xie Zheng Guang
Published: December 2012

To meet the demand for low insertion loss, we have studied a SAW filter with single phase unidirectional transducer (SPUDT) structure using piezoelectric materials YZ-LiNbO3. This article shows the simulation results of the SAW filter using Matlab software with the SAW velocity 3488m/s and electromechanical coupling constant 0.048. The theoretical center frequency is 72MHz and the 3dB bandwidth is 2.9MHz. The total frequency response of the entire SAW device is the product of the frequency response of the input transducer and the output transducer. It can be seen from the simulation results that the magnitude response and the linear phase response of interdigital transducer are consistent with the theoretical values and the minimum insertion loss reaches 5.43dB. So the low insertion loss SAW filter with SPUDT structure using YZ-LiNbO3 adapts the requirements of the radar, communications and other electronic systems.
The Design Study of High-Speed Cylindrical Grinding Machine Transmission System
Authors: Li Hui , Zhang Fa Ting
Published: December 2012

In mechanical processing, according to the requirements of components’ high surface quality, this paper makes a structure design of high-speed cylindrical grinding machine transmission system. Such structure is mainly used in high-speed grinding and powerful grinding, so as to improve the grinding efficiency. The design provides a certain basis for the further research of grinding machine structure.
Active Control of Fuzzy for High-Speed Pantograph
Authors: Yang Gang , Dai Zhong Mei , Li Fu , Luo Zheng Zhi
Published: December 2012

The regular current collection is very important for high-speed train， and can be obviously improved by the use of active control. In order to study the impact of the fuzzy active control on pantograph-catenary system, the model ohe simulation model is created with the software of simulink. Finally the influences of fuzzy active control on dynamic performances and quality of current collection of the pantograph-catenary system are analyzed. It seems that, the performances of the system with or without active control is established, the fuzzy controller is constructed, and tf the pantograph- catenary system can be improved obviously under the fuzzy active control, the maximum value of the contact force is reduced to 50 percent, the minimum is increased to 80 percent, and the fluctuation extent of the contact force is reduced to 70 percent.
Finite Element Analysis of Anchor Assembly in Cable Hydraulic Lift
Authors: Qin Jian , Zou Yu Ying , Miao Qian
Published: December 2012

The anchor assembly is the important part of the hydraulic lift, the stresses of which under load are analyzed using finite element method. The 3D mechanical models of anchor assembly are created with different sizes. Several important positions are investigated around the holes of upper anchor and these stresses are compared between different cases. Based upon the numerical results, the safety assessment of the anchor assembly is conducted and a reasonable design scheme is proposed.
Kinematic Analysis and Digital Mock-up Based Hybrid Verification about the Industrial Robot with Symmetric Dual Planar Four-Bar Mechanism
Authors: Chen Xiao Xi , He Ping , Han Liu
Published: December 2012

In this paper, the context of relative kinematic modeling, and the analysis of symmetric dual four-bar mechanism industrial robot are introduced. For such mechanism, its designation of the representative algorithm, and its simplification, simulation, verification and alternately analysis in Forward Kinematics Problems (FKP) and Inverse Kinematics Problem (IKP) were studied. Via such method, it’s possible to efficiently analyze and solve the both of FKP and IKP of symmetric dual planar four-bar mechanism. Thus this method can be applied for the design, simulation and verification for the robot with similar structure.
On the Interaction Design of Game Bike
Authors: You Jang Shyong
Published: December 2012

The interaction design of games pay more attention to the information interfaces, but overlooks the players’ preference, which leads to usability problems for them. The problems include hand rigid, pain, and lack of exercise and so on. The players' preferences are closely connected with the interaction form, and interaction function. Thus, topics about how to improve the product’s usefulness are in much need for discussing. Nowadays, it is a shared dream that people can enjoy life in the highly stressed society. Therefore, the digital technology can be used in bike interaction design, then, simulate the interaction between the game and bicycle as well as stimulating the users to participate in the sports actively. It can create a new kind of sports experience to achieve a mutual beneficial interaction between games and players. In addition, bicycle has the advantage of activating the whole body and less likely injuring the body, which is an unique characteristic that video games do not have. Therefore, this paper will firstly summarize the interaction forms of game bicycle: the somatosensory steering, sense of speed, and virtual reality devices; secondly, the construction of the experiment platform; thirdly, access the interaction function by the interviewing after the experiment (subjective assessment) and measuring the heart rate (objective assessment). In the interview part, each device in terms of the cognitive, affectivity, usefulness, and satisfaction are all good enough in interaction function; and in the heart rate measurement part, each device has a good exercises function.
Fast Construction of the Implicit Surface for Complex Casting Geometries
Authors: Chen Tao , Liao Dun Ming , Pang Sheng Yong , Zhou Jian Xin
Published: December 2012

Computational simulation relies on valid and accurate representations of the geometry of objects being simulated. However, the Stereo Lithography (STL), one of the most commonly used formats for computational simulation, may be invalid with several kinds of defects when the geometry is too geometrically and topologically complex. In many cases, castings have the most complicated geometries in the world, and its geometries in STL format always contain some defects. The implicit surface is a much more robust geometry representation than STL. With the representation in the implicit surface, most of the defects in STL can be cleared and ignored. This paper presents a method to fast construct the implicit surface for arbitrary complex casting geometries in the format of STL.
Minimum Sensitivity Robust Design of Cycloid Pinwheel Speed Reducer
Authors: Lu Xin Chun
Published: December 2012

This paper advanced a kind of method that put sensitivity analysis of target function and restriction conditions into robust optimal design of cycloid pinwheel speed reducer. An applied example showed that the method could improve feasibility robustness of optimal result and ensured design quality.
Research on Fretting Fatigue Life of Interference Fit and its Influencing Factors
Authors: Huang Chang Wu , Yang Guang Xue , Fu Nian Jun , Xie Ji Long
Published: December 2012

Interference-Fit Components, Especially under Rotating Bending Loads, Usually Suffer Fretting Fatigue, which Tremendously Reduces Service Lives of the Components. by Taking Specimens with Different Interference-Fit Parameters for Fatigue Test, their Fretting Fatigue Lives Could Be Obtained. and through Using Finite Element Analysis (FEA) Software ABAQUS, the Ruiz Fretting Damage Parameter K(x) for each Tested Fatigue Specimen Were Achieved. then, According to the Test Data and the Results of Calculations, Two Fretting-Fatigue Life Prediction Models (model 1：N=c•K-α, and Model 2：N=λN0—m•Kn) )based on the Ruiz Fretting Damage Parameter Were Fitted, and their Ratλionalities and Validities Were Analyzed. at the same Time, the Influences of Interference-Fit Parameters -Interference Value (V), Casing outside Diameter (D), and Casing Length (L), Contact Pressure (p) and Friction Shear Stress (τ) on Fretting Fatigue Life Have Been Analyzed. the Results Showed that the Two Fitalic Textretting Fatigue Life Prediction Models Used in this Paper Were Valid, but, in Contrast, the Second One Was More Accurate and Rational; and that Fretting Fatigue Life (N) Decreased as V, D, L, P or τ Increasing.
Effect of Surface Treatment on the Morphology of Si3N4 Nanowires
Authors: Chen Jin , Wang Xiao Gang
Published: December 2012

The effect of surface treatment using polymer surface treating agent on the morphology of the Si3N4 nanowires was studied. The morphology, microstructure and surface chemical groups was characterized by using SEM, Granulometery, X-ray diffraction, Thermogravimetric analysis, diffuse reflectance infrared Fourier transform spectroscopy, The result s indicate that surface modify can not change the morphology of the nanowires. At the same time modifier on Si3N4 nanowire surface is chemical adsorption coating. Modifier coating occurred oxidative decomposition in 200-400oC
Preparation and Thermal Conductivity Behavior of Elastomeric Silicon Rubber-Aluminum Nitride Composite
Authors: Chen Jin , Wang Xiang Gang , Zhang Hai Yan
Published: December 2012

The thermal conductive silicon rubber have been prepared by using aluminum nitride as filler. The morphology and dispersion propriety of the filler were investigated by Scanning electron microscopy. The thermal conductivity of the composites was analysized by thermal measurement system. The results show that The larger particles give rise to a higher thermal conductivity of composites, at the same time the thermal conductivity of the composites increase with increase of aluminum nitride filler fraction. When the particle size is 60 nm, the thermal conductivity of composites at 40% volume fraction is about 3.5times that of pure silicon rubber matrix.
Hydrogen Storage in Carbon Nanotubes Prepared by Using Copper Nanoparticles as Catalyst
Authors: Chen Jin , Wang Xiao Gang , Zhang Hai Yan
Published: December 2012

carbon nanotubes were synthesized by pyroysis method using copper nanoparticles as catalyst. The structure, phase composition and hydrogen storage capacity were investigated by TEM, XRD spectra and Electrochemical System. The results show that the diameter of carbon nanotubes is 200-500nm, The P-C-T curve of adsorbing hydrogen of samples was measured in the pressure up to 12 MPa at room temperature. we show that a SWNT can strongly adsorb up to 8-wt% hydrogen. These results advance our fundamental understanding of dissociative adsorption of hydrogen in nanostructures and suggest new routes to better storage and catalyst materials.
Theoretical Study on the GeH4•••Y (Y=He, Ne, Ar and Kr) Systems
Authors: Yuan Kun , Lv Ling Ling , Zhu Yuan Cheng
Published: December 2012

MP2/aug-cc-pvtz level was used to optimize geometries of the complexes between GeH4 and Y(Y=He, Ne, Ar and Kr). The structures and electronic properties of the blue-shift hydrogen bonds complexes GeH4…Y(Y=Ar, Kr) were investigated. The calculated interaction energies with basis set super-position error (BSSE) correction revealed that the relative stabilities of the complexes in the order: GeH4…He ˂ GeH4…Ne ˂ GeH4…Ar ≈ GeH4…Kr. The calculated results showed that the interactions between GeH4 and Y（Y=He, Ne）belong to van der Waals force, and those between GeH4 and Y（Y=Ar, Kr）belong to weak hydrogen bond. NBO (natural bond orbital theory) and electron behavior analysis showed that GeH4…Y(Y= Ar, Kr) hydrogen bond is with a non-electrostatic property.
An Analysis of the Sound Insulation for Compound Steel Panel
Authors: Zhang Tao , Wang Yan Song , Lei Jie , Chen Na
Published: December 2012

Sound insulation equation of steel panel and other insulation materials of compound panel was deduced in normal case, based on the Wave Transferring theory in this paper. Single steel panel and compound steel panel with a certain thickness were predicted theoretically and then measured in the standing wave tube practically. Compared with the two results, the predicted values were matched with the measured values.
Post-Annealing on the Electrical Properties of Ta-Doped In2O3 Transparent Conductive Films
Authors: Xu Lei , Wang Rui , Xiao Qi
Published: December 2012

Ta-doped In2O3 transparent conductive oxide (TCO) films are deposited on glass substrates by radio-frequency (RF) sputtering at 300°C. The influence of post-annealing on the structural, morphologic, electrical, and optical properties of the films is investigated by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), Hall measurement, and optical transmission spectroscopy. The obtained films are polycrystalline with a cubic structure and preferentially oriented in the (222) crystallographic direction. The lowest resistivity of 5.1 × 10−4 Ω•cm is obtained from the film annealed at 500°C, which is only half of that from the un-annealed film (9.9 × 10-4 Ω).
Influence of Dissolved Oxygen on Trivalent Chromium Removal from Wastewater by GQSS
Authors: Li Jun Guo , Shi Yan , Wei Ling Hong
Published: December 2012

Gas quenching steel slag (GQSS) without any post treatment and modification could be utilized to remove Cr(III) from wastewater. Due to lower content of reductive material in GQSS, it was suggested that dissolved oxygen in solution should be declined slightly to the minimum with libration time, and then increased as the testing centrifuge tubes without lids because of dissolution of oxygen from atmosphere. Dissolved oxygen chromium original have significant influence on redox potential in solution. pH increased with the increasing of libration time because of dissolution of alkaline material in GQSS. But dissolution oxygen has little influence on pH in solution. It was suggested that Cr(III) removal percentage when the solution was sealed from atmosphere was slightly higher than that as the soltuion without seal, which was related with the influence of dissolved oxygen on pH and redox potential in solution.
Fractal Study for Surface Cracks on the Recycled Concrete Beams with Recycled Bricks
Authors: Sun Hong Quan , Guo Jian
Published: December 2012

In this paper, the experimental research on crack of four recycled aggregate concrete simple beams under a concentrated load was presented. Through the analysis of evolution and distribution characteristics of cracks with different amount of recycled brick, it is verified that the surface cracks on the recycled aggregate concrete beams have a very good fractal behavior. The research shows that the content of the recycled brick has obvious influence on the fractal dimension of the surface cracks of the beams. The more the content of the recycled brick is, the bigger the fractal dimension is. So the fractal dimension can be regarded as an index to evaluate damage degree of the recycled aggregate concrete beam. This research provides a novel idea and a method for studying the damage of the concrete structures.
RAP Percentage and Warm Mix Additive Influence on Regenerated Asphalt Mixture Performance
Authors: Liu Wei
Published: December 2012

The warm mix regeneration technology has prominent economical efficiency that can not only reduce the secondary aging of new asphalt and old asphalt in RAP materials during the production process, but also improve the use proportion of RAP materials. As for the increase of RAP dosage and the warm mix additive added to influence the plant regenerated asphalt mixture performance, this paper adopts two kinds of warm mix additive for the test and analysis of the warm mix regenerated asphalt mixture performance with 20% and 60% RAP. The results indicate that magnify the proportion of RAP percentage makes contribution to further improve high-temperature performance of the regenerated mixture, but it has adverse effects on water resistant damage performance and low-temperature performance. At the same time, adopting the warm mix additive can significantly reduce the adverse effect, so warm mix regenerated technology has better feasibility.
Influences of Process and Equipment on Filament Unevenness
Authors: Wang Jiang Ping , Tian Zhi Hui
Published: December 2012

The yarn irregularity of polyester POY in melt spinning influences not only the follow-up spinning property, but also the dyeing performance. The yarn irregularity is caused mainly by unstable state during which the filament is formed. It is presented in this paper that the main factors which affect the filament unevenness in melt spinning. They are the quality of raw materials, the improper choice and fluctuation of technological parameters, the structure of equipments and running conditions, etc. Such factors as steady spinning temperature, quenching conditions, the high performance finishes, proper collection oiling point and correct operation will guarantee lower filament unevenness.
The Dynamics Simulate Analysis of the Ball Mill with Grinding Ball
Authors: Gao Yang , Huang Lu Yu , Wang Yan Hui
Published: December 2012

The ball mill is the important equipment in the mining industry, with the development of the macro-scale ball mill, and is more difficult of liner’s wearing,installation and taking apart. The service life which raises a liner will prolong the production period that the ball mill, influencing an economic benefit of the concentrating mill. Therefore, it is of great significance for dynamics simulating on the grinding ball, studying of grinding ball on dynamics characteristic and improving the liner shape,reducing relative slide, and extending the liner’s age.
Research on Car Body Measurement Method Based on Body Repairing
Authors: Cheng Jian Zhong , He Hao Tao , Wu Xiao Wei
Published: December 2012

In order to improve the vehicle reliability after the repair，the paper analyzes the importance of body measurement in the body repair. It explains the control points, datum, the center surface and zero plane of body measurement, and puts forward the visual observation, general tools measuring method and computer measurement method based on existing measurement methods of body repair. Moreover, this paper researches the using range and measurement features of the three methods, explains the data of body size and the using of the measurement tools. Finally, in order to improve the efficiency and quality of body repair, this paper chooses the reasonable methods to measure based on the body damage and repair parts.
Research on Design of Authentication and Charging System in Mechanical Devices
Authors: Li Yan , Chen Yao
Published: December 2012

It was presented how to design a management system under FreeBSD. The system can be used in Mechanical devices to authenticate and charge the client through PPPoE based on RADIUS.And the built-in batch card generation, management functions can help in the number of user connections and bandwidth control,thus to achieve powerful management capabilities and user self-management capabilities.
Design on Turbocharger Inlet Control Device
Authors: Qiu Li Jun , Xu Su Ying
Published: December 2012

Turbocharger exhaust device is in controlling exhaust speed device. The controllable exhaust device is to improve the turbocharger in the low-speed running of the engine torque output and high speed power output device. Parts processing in a controllable exhaust device and the whole installation process has two problems to be solved. A problem is a rotating plate deflector rod in the assembly welding processing. Another is mounted in the assembly. The solution is improved the structure of apparatus and parts. It is including exhaust control rotor structure, the drive ring structures and devices in the corresponding connector design. Integral casting of the rotor lever is used to replace welding rotary sheet shifting rod. The whole assembly structure design is used to replace the combined assembly. The controllable exhaust device is integral installation structure design. To solve the problem is assembly again assembly problem.
Study of Strata Sloughing Mechanism and Anti-Sloughing Measures with Mechanics Properties and Material Properties in Yitong Area
Authors: Sun Yu Xue , Wang Ze Hua , Shi Hai Min , Sun Jiu Zhou
Published: December 2012

Abstract. As there are serious wellbore instability problems in Yitong area, studying sloughing mechanism and anti-sloughing measures of the strata is of great importance, which differs significantly from the previous researches. Based on the international state-of-the-art, in this work several points are focused on which include the appearance characteristics of the cores, rock mineral composition and the shale physical and chemical properties. Sloughing mechanism is classified and anti-sloughing measures of the strata in Yitong area are proposed. When testing shale physical and chemical properties, several parameters are mainly tested and analyzed, including cation exchange capacity, specific water absorption, shale recovery rate and shale inflation rate. Five core samples are selected and collated data is reflected in tables in the experiment. It is worth mentioning that a new method of specific water absorption is adopted in the study to explain wellbore instability problems, which are caused by hydration. Limitations and shortcomings have been overcome by specific water absorption instead of total water absorption when evaluating water sensibility. The test shows satisfying and excellent results. After applying the anti-sloughing measures to the strata in Yitong area, sloughing accidents have been alleviated.
Application of Frequency Converter with Applied Mechanics Used in Exploitation and Design of the Milling Machine
Authors: Wu Tao
Published: December 2012

With the rapid development and popularization of frequency converter, the application of frequency converter used in the main transmission of milling machine could realize stepless speed regulation. Thus the optimal cutting speed is achieved. In this paper, a new design of spindle box of horizontal milling machine is proposed. The cutting force of face milling is analyzed deeply. The applied mechanics analysis of transmission shaft is also discussed in detail. And the milling machine structure is simplified as well.
Multi-Objective Optimization Design of Vibration Screener Support Spring Parameters with Vibration Mechanics
Authors: Meng Ling Qin , Wang Zhi Wei
Published: December 2012

Vibration screener is an important mechanism which is widely applied to metallurgy, building materials, chemical industry, grain, mine, etc. On the basis of deeply studying work principle and support structure of vibration screener, the paper conducts ZKB Linear vibration screener as study object. According to mass of vibration, vertical stiffness, horizontal stiffness, vertical amplitude, horizontal amplitude, and free high of vibration screener support spring, the paper conducts the lightest weight of support spring and the biggest fatigue safety factor as the objective function of multi-objective optimization design to establish a series of constraints. Then using of the penalty function method of optimization theory , the paper gets the optimal design results of support spring and gives the optimal design dimensions, which provides a reliable design method of support spring for the future design of vibration screener and reduce the blindness of the design .
Mechanics Analysis of the Wind Power Blade for further Renewable Energy System
Authors: Li Bin , Kang Zhong Miao , Tang Liang Rui , Qi Bing
Published: December 2012

One of the key technologies of large-scale wind turbine composite blades developed, it relates to the aerodynamics, structural dynamics, structural testing of composite materials, process manufacturing, mold equipment technology, technical difficulty. The vast majority of the world leaves glass fiber reinforced plastic (FRP) composites manufacturing, the main consideration fiberglass / composite other materials do not have some advantages. Numerical results are presented in this paper to investigate the load pressure effect on the middle and the root of the blade. From the results of finite element analysis, leaves uneven force is very complex. The skin panels withstand normal stress caused by the bending of the left skin consider tensile strength under stress.
The Study of Special Materials on the Strain Rate Machine Based on Static Tensile
Authors: Liu Xue Peng , Zhao Dong Mei
Published: December 2012

Strain rate, the control of the specimens’ damage, oscillation, and the response deformation are studied. The reliability of the special material LY12CZ specimen in the strain rate machine is tested. The experiment problem is solved by extending the strengthened piece. The strain rate of one-way GFRP loading experiment is also studied
Preparation of RPSL-02 Type Photosensitive Resin for Stereolithography Material and Investigation on its some Properties
Authors: Huang Bi Wu , Zhou Kuan , Deng Chong , Chen Wei Qing
Published: December 2012

RPSL-02 type photosensitive resin for stereolithography material was prepared with 3,4-epoxycyclohexylmethyl-3',4'-epoxycyclohexanecarboxylate (UVR 6110), bisphenol A type epoxy diacrylate (EA-612), trimethyolpropane triacrylate (TMPTA), polycaprolactone polyol (polyol-0301), triethylene glycol divinyl ether (DVE-3), benzil dimethyl ketal (Irgacure651) and a mixture of triarylsulfonium hexafluoroantimonate salts (UVI-6976) as raw materials. Some properties of the photosensitive resin were investigated. The viscosity of the photosensitive resin at 30°C was 395mPa.S, The glass transition temperature (Tg ) of the UV-cured specimen was 52°C, and the weight loss of the UV-cured specimen at 200°C was less than 5%. The photosensitive resin and its UV-cured specimen were also characterized by infrared (IR).
Enhanced Removal of Phenol by a Hyper-Cross-Linked Resin Functionalized with Composite Properties of Chemical Materials
Authors: Xiao Gu Qing , Tang Peng
Published: December 2012

A hyper-cross-linked polymeric adsorbent GQ-1 functionalized with acetamino groups and hydroxyl groups was synthesized to remove phenol. Results showed that the maximum adsorption capacity of GQ-1 emerged at the molecular state of phenol. More favorable adsorption of phenol onto GQ-1 than XAD-4 was further demonstrated by thermodynamic analysis. The breakthrough capacity of GQ-1 was 2.53 times that of XAD-4 when the effluent concentration reached 5mg/L.
Study on Mobile Robot Applied Mechanics Modeling and Motion Planning
Authors: Liu Xue Peng , Zhao Dong Mei
Published: December 2012

Through the closed loop system response curve of the approximate treatment and the concept of dominant pole, combined with the root track analysis, the most similar to the open loop system model in applied mechanics is obtained. In the process of the closed-loop system model, the friction and gear clearance is considered for manufacturing system. The path planning is proposed for wheeled mobile robots
Electrostatic-Structure Couple Field Analysis in Electrode Plate Design of Electrostatic Membrane Reflector with Composite Properties of Membrane Material
Authors: Shi Guang Feng , Zhang Peng
Published: December 2012

Electrode plate is a key component of membrane reflector which is light enough and deployable for launching into the space for large aperture telescope. But due to complexity of the control and structure design of electrostatic membrane reflector, it is difficult to begin the trial research. In this paper, firstly, the electrode plate type about the electrodes distribution is analyzed and designed. Then, ANSYS parametric design language is used to analyze the electrostatic-structure couple field in a numerical method and by which interval distances among the electrodes is determined. Finally, prototypes of the electrode plate and the electrostatic membrane reflector are manufactured. And the following work about the control and measurement of the stretched membrane shape shows the work in this paper is feasible and effective.
Study on the Color of TiN Films on the Aluminium Alloys Surface
Authors: Wang Hui Qiang , Sun Wei Lian , Xing Yan Qiu , Dong Ting Ting
Published: December 2012

TiN film deposited by mid frequency reactive magnetron sputtering process on aluminium alloys surface,which can improved the color of aluminium alloys.Use International Commission on Illumination(CIE) 1976(L*、a*、b*) to calibrate the film color,and use the photoelectric spectrocolorimeter of CM-2600d to research the influence of nitrogen flow rate, sputtering time to the film color.The results show that,TiN thin film color will be change from light yellow, yellow, golden yellow to deep yellow with the nitrogen flow rate and the sputtering time increased.When the nitrogen flow rate reach 18sccm and the sputtering time reach 15min,the color parameter will be L*= 83,a*= 2,b*= 30. At this point, the film thickness is 70nm,TiN thin films have golden yellow color, which have the excellent mechanical characteristic.
Effects of Glass Glaze on Wear Resistance of Cr2O3 Ceramic Coating
Authors: Zhang Shu Pin , Liu Zan , Qiu Chang Jun
Published: December 2012

In this paper, the thermal spraying powder, which was made by sintering, was respectively mixed by Cr2O3 and glass glaze at the mass ratio of 85%, 95%, and 100%.The three mixed powders were sprayed on the surface of 45 steel by CP-3000 subsonic spray gun. Then the samples were heated in the resistance furnace until the temperature reached 1050°C. At room temperature,the wear resistance of these three kinds of coatings were investigated along with load and time changing under water lubricating. The impact of glass glaze on coatings was found after analyzing the change of the weight loss of the coatings. The result showed that there was not the shedding of splat except some brittle micro-peeling at the rim of splat and furrow on the surface of 85% and 95% Cr2O3 ceramic coatings. The wear resistance of the coatings was improved with the increase of the percentage of glass glaze , and began to desend when the percentage arrived at a certain degree. It indicated that the wear resistance was the best when the percentage was about 95% in this experiment.
A Finite Element Simulation of Mold Filling Process in Resin Film Infusion Based on Material Properties and Mechanics Properties
Authors: Yang Mei , Liu Xiao
Published: December 2012

A finite element method (FEM) has been developed to simulate the isothermal resin infusing process in resin film infusion. The FEM is based on conservation of resin mass at any instant of time and is objective of resin film infusion (RFI) fiber impregnation and mold filling. The developed computer code was able to simulate the resin infusing visually. A numerical example presented here demonstrated that compared with traditional finite element/ control-volume (FE/CV), FEM is physically accurate and computationally efficient.