bluuebunny/crossref_metadata_2025 huggingface dataset:
The Stress Intensity Factor of Opening Mode Determined by Digital Image Correlation
Authors: Zhang Rui , He Ling Feng , Li Chang Rong
Published: August 2011

Applications of the digital image correlation method (DIC) for the determination of the opening mode stress intensity factor (SIF) is investigated using an edge cracked aluminum plate in this paper. Standard compact tension test specimen was tested under tensile loading and the full-field displacement fields of the test sample were recorded using DIC. The SIF associated with unavoidable rigid-body displacement translation were calculated simultaneously from the experimental data by fitting the theoretical displacement field using the method of least-squares. Selection of displacement and convergence values is discussed. For validation, the SIF thus determined is compared with theoretical results, confirming the effectiveness and accuracy of the proposed technique. Therefore it reveals that the DIC is a practical and effective tool for full-field deformation and SIF measurement.
Experimental Investigation of Nano Ceramic Material Interaction with High Enthalpy Argon under Shock Dynamic Loading
Authors: Jayaram Vishakantaiah , Preetam Singh , Reddy K. P. J.
Published: August 2011

Indigenously designed and fabricated free piston driven shock tube (FPST) was used to generate strong shock heated test gases for the study of aero-thermodynamic reactions on ceramic materials. The reflected shock wave at the end of the shock tube generates high pressure and temperature test gas (Argon, Ar) for short duration. Interaction of materials with shock heated Ar gas leads to formation of a new solid or stabilization of a material in new crystallographic phase. In this shock tube, the generated shock waves was utilized to heat Ar to a very high temperature (11760 K) at about 40-55 bar for 2-4 ms. We confirmed the phase transformation and electronic structure of the material after exposure to shock by XRD and XPS studies. This high enthalpy gas generated in the shock-tube was utilized to synthesize cubic perovskite CeCrO3from fluorite Ce0.5Cr0.5O2+δoxide. We were able to demonstrate that this ceramic materials undergoes phase transformations with the interaction of high enthalpy gas under shock dynamic loading.
Concrete Property Analysis with the Perspective of “5-10-14-18” and “5-10-18-22” Band Gradation
Authors: Warda Bint Ashraf , Munaz Ahmed Noor
Published: August 2011

Recent concrete specifications often require the use of combined aggregate gradation that meets the “8-18” band gradation. But theoretically “8-18” band covers a wide range of aggregate variation which may result in variable properties of concrete. To avoid this drawback, two new band gradations were proposed, these are, “5-10-14-18” and “5-10-18-22” bands. This paper analyses different aspects of these proposed bands through a number of concrete mix results.
Modeling and Simulation of Hydraulic AGC System in a Cold Mill
Authors: Gao Qi Ming , Wu Li Li , Zhao Guo Qing , Liu Xiu Jun
Published: August 2011

Regarding a 300mm practical mill as the research object, the mathematical model of the hydraulic AGC system in the mill is established. Experimental results show that the model is simple and reliable. It is useful for analyzing the impact of various factors on the plate thickness. It has important theoretical significance for such system’s optimal design and analysis.
Research on New Machining Method that Cutting Arc Surfaces in SIEMENS840D System
Authors: Chen Wen Bing , Feng Jin Chun , Huang Song He
Published: August 2011

Analyzed the commonly used method that machined large diameter hole bottom transition arc surface, it’ advantages and shortcoming. Through an example, we introduced the method of using the R parameter programming of SIEMENS840D numerical control system when milling cut large diameter transition arc surfaces. This method's application has the positive significance to reduce the programming and other non-productive work time, guaranteed processing quality, raised the machining efficiency, so we introduce this method and hope it is helpful to machining of similar parts.
The Harmonic Response Analysis on Vibration System of Disc Vibration Dryer
Authors: Wang Xue Ping , Zhang Zhen Wei , Deng Yong Sheng
Published: August 2011

The chassis of disc vibration dryer is easy to be destroyed during operation. Aimed at this problem, this paper analyses harmonic responses of dryer vibration system based on ANSYS. The curves both in the relation between the displacement and the frequency and in the realtion between the stress and the frequency about several special positions in which the chassis is easy to be destroyed were obtained. The analyses to curves provided a basis for this kind of dryer's structural design, improvement and maintenance.
Incipient Hydrate Formation Pressure-Temperature and Equilibrium Composition for CH4-N2-O2-THF-H2O System
Authors: Gao Xia , Wu Qiang , Zhang Bao Yong
Published: August 2011

The new method for separating drained coal bed methane (CBM) is based on gas hydrate formation. The thermodynamic parameters of incipient hydrate formation for the CH4-N2-O2-THF-H2O system were carefully determined. After establishing equilibrium state of three-phase coexistence, CH4 concentrations of vapor phase and that of hydrate phase were determined by GC. The results show that the higher the THF concentration, the larger the CH4 concentration in hydrate phase and the partition coefficient. It can provide the reference for seeking the optimal promoters in the hydrate formation process for the mixed gas.
Environmental Characteristical Study on Pyrite Smelting Slag
Authors: Ma Wen Jian , Li Dong Wei , Yu Lin
Published: August 2011

The pyrite smelting slag as industry waste residue was always fully studied in the present research. Due to the complexity of the property of the waste residue,which the environmental hazards of has been discussed in the experiment. Firstly, the complex composition of the waste residue and the primary contamination of heavy metals which included the Copper, Cadmium, Zinc, Nickel, Lead, Chromium and Arsenic usually were determined by XRF scanning. the result of XRF scanning also showed the value for reuse of the waste residue.Secondly,the test investigated the leaching toxicity of the waste residue,the results indicated that the heavy metal of the residue was in low concentration ,in the other words,the slag lixivium was in the range of the required standard, the pyrite smelting slag does not belong to hazardous wastes. The Copper, Zinc and Nickel had not exceeded the standard limit,however, the waste residue could contaminate the surrounding environment if it didn’t been disposed with proper methods.based on the further study, the residue belongs to Class Ⅱ General Industrial Solid Waste and the main phase present in pyrite smelting slag were silicon oxide. Thirdly, through XRD spectra analysis,it can be indicated that waste oxides and sulfate facies were the major phases of heavy metals. So,in order to prevent these potential risks,some effective protection measures should be taken.
Reformed Hydrous-Ethanol Application in Spark Ignition Engine
Authors: You Fu Bing , Zhang Xin Tang , Pan Zhi Xiang , Li Ge Sheng
Published: August 2011

Hydrous-ethanol is reformed to hydrogen-rich mixture gas which is an excellent fuel for engines. The advantages of this approach are that fossil fuel consumption and CO2 emissions are reduced, and the waste heat from engine exhaust can be used as energy source for hydrous-ethanol evaporating and reforming. The experiment is carried out on a gasoline engine as primary engine with only modest changes. The results indicate that the hydrogen-rich mixture gas allows operation at much higher compression ratio due to its intrinsic octane number which could contribute to the power performance, and the NOx, CO, THC emissions are reduced remarkably because of lean combustion realized in the cylinder.
Optimal DFIG Converter Protection Design under Different Controllers
Authors: Liu Zi Fa , Olimpo Anaya Lara
Published: August 2011

To enable wind turbine and the power converter have the ability to protect itself without disconnection to power grids during the fault, protection for crowbar and chopper should be designed properly. Optimal resistors value of crowbar and chopper are calculated under PVdq controller and Fmac controller according to the proposed index which embody the effect of rotor current, reactive power, converter capacitor voltage and the electrical torque. Simulation results obtained by using PSCAD show that DFIG should be designed with different optimal crowbar and chopper resistors under different controllers. Moreover, DFIG with Fmac controller has better fault ride-through capability than that with PVdq controller.
A Material Selection Model of Mechanical Products Based on Total Life Cycle Design
Authors: He Liang , Guo Wan Lin
Published: August 2011

Material selection in mechanical products based on total life cycle design is a complicated work, which should be studied systematically. A material selection model of mechanical products based on total life cycle design was proposed. A set of candidate materials were screened out, and then assessed according to the technical, economic and environmental assessment index. The candidate materials were ranked by using by using Z-transformation method in each of the assessment index. Different weights were assigned to each of the three assessment indexes, and global assessment was carried out according to different strategies or requirements which pay more attention to technical, economic or environmental performance of the material product used. A case in selecting aircraft structure element material was studied. The analysis results showed that the method could rank the candidate materials and selected out the “optimized material”, and the influence of the subjectivity of designer was reduced. The method provides some practical values for preliminary material selection in the early design stage of the mechanical products based on life cycle design.
The Exploration of Fuzzy Inference-Based Fitness Monitoring CAD System
Authors: Huang Yu Chun , Zhang Jian , Wang Yong Qing
Published: August 2011

The traditional methods of fitness monitoring are restricted to medical and hygienic science, which can not meet the requirements of development in modern society. We apply in this paper the method of Fuzzy Inference (FI) to the research of fitness monitoring CAD system. The monitoring results demonstrate competive performance both in training time and approximation to the domain expert knowledge.
Design of Material Electrostatic Test Platform
Authors: Zheng Hui Zhi , Hu Xiao Feng , Du Zhao Heng , Liu Wei
Published: August 2011

The electrostatic charge accumulates on the surface of the aerial vehicle when flying. And the electrostatic discharge would impact the aerial vehicle and the airborne equipment enormously. In order to study the triboelectrifiction of the aerial vehicle skin material and space particle, the triboelectrifiction principle of the skin material is analyzed, and aerial vehicle skin material triboelectrifiction experimental platform has been designed. Lots of troubles are overcome like the relatively high speed of aerial vehicle and space particles, required high bleeder resistance for analog devices, and testing problem of friction potential. The rotary friction method, composite insulating layer, contact electrostatic potential test method are adopted for the experimental platform. And aerial vehicle skin material has been tested using the test platform. From the experimental results, the friction contact time, the separation process, and the contact area are analyzed. So the material electrostatic test platform can be used as material electrostatic charge experimental research equipment.
The Design of Multi-Index System on UCAC2 Catalog
Authors: Pan Jing Chang , Shao Hong Hui , Li Xiao Long
Published: August 2011

Catalog is a celestial databank which records various parameters, such as location, motion, magnitude, and spectral type. UCAC2 (The Second U.S. Naval Observatory CCD Astrograph Catalog) is a high density, highly accurate, astrometric catalog of 48,330,571 stars. Currently the UCAC2 catalog can only be accessed by an index of ascension and declination. To facilitate the efficient multi-dimensional access to UCAC2, this paper proposed the detailed design and implementation of the multi-indexed catalog database. The newly established index system can provide efficient access in multiple entrance to the catalog.
Intelligent Prediction on the Quality of Cementing
Authors: Wang Wei Zhang
Published: August 2011

The present solutions of well cementing are mostly designed by designers’ experience and calculation which can not predict the engineering quality after application of the designs. Meanwhile some questions in the designs can not be solved before construction. On the basis of detailed evaluation of every influential factor according to construction and environmental conditions, this article provides cementing fuzzy neural network model by means of 2nsoftEditor neural network modeling tools, and the stable software systems with the combination of artificial neural network and fuzzy logic rules are expected to improve the credibility of cementing quality prediction. Construction practice shows that cementing quality prediction with application of fuzzy neural network system before cementing can greatly reduce the cementing costs and improve the cementing success ratio.
Research on Signal Timing Method of Intersection Based on RFID
Authors: He Wei , Xiong Jie
Published: August 2011

Based on the RFID (Radio Frequency Identification Devices), this paper presents new research work of signal timing intersection in the aspects of the key points of design, the main parameter and timing methods. Finally, the intersection of signal timing of fuzzy control method based on RFID is proposed through comparative analysis of the intersection of several traditional signal timing methods.
Computer Modeling for the CFG Pile in Highway Soft Foundation
Authors: Zhou Ke Feng , Li Yu Zhi
Published: August 2011

In past 10 years, composite foundations, especially multipile composite foundations have been extensively used. Multi-pile composite foundation is a method of ground improvement that involves using different pile types with different lengths and diameters beneath the same raft. The CFG piles are generally much stiffer than lime piles and they are used in a manner similar to that used for conventional piles; that is, to mobilize bearing capacity from the deeper soil strata. This paper presents the results of a series of three dimensional (3D) finite element analyzes on CFG–lime composite pile foundations. The parameters investigated are the spacing of CFG pile and cushion thickness.
The Design of Double Liquid Zoom Lens’ Model Based on Electrowetting Effect
Authors: Li Ke , Zhang Jin Li , Zhao Hai Xing
Published: August 2011

The electrowetting effect is one physical chemistry phenomenon, it through adds certain external voltage in the solid - liquid contact surface to change the liquid to the solid moist degree, thus changing the contact angle of liquids and solids. In this article double liquid zoom lens are based on this kind of electrowetting effect. Optics focal variation system realizes the focal variation to satisfy two basic conditions[2]: (1) changing the focal distance; (2) maintaining the image plane position invariance. The single liquid zoom lens cannot maintain the position of the image formation surface invariance, this article takes on the electrowetting effect double liquid zoom lens as a foundation, and designs to realize new optical systems without mechanical movement focal variation using the motor control, and through MATLAB software simulation inferential reasoning the result.
Study on Fault Signal Detection for PMLSM
Authors: Xu Bao Yu , Xu Xiao Zhuo , Liu Yi Lun , Wang Xu Dong
Published: August 2011

Based on wavelet transform and artificial neural network, a novel method which takes advantage of both the multi-resolution decomposition of wavelet transform and the classification characteristics of artificial neural network is proposed for fault detection of permanent magnet linear synchronous motor (PMLSM). According to the characteristic of unhealthy PMLSM, the wavelet transform is carried out to decompose and reconstruct winding current signal. Then the energy of each frequency band as faulty features can be detected through spectrum analysis of wavelet coefficients about each frequency band. With normalization method, the feature vectors are constructed from relative energy for energy of each frequency band. The proposed method is applied to the fault detection of PMLSM, and the result of simulation proved that the wavelet neural network can effectively detect different conditions of PMLSM.
A Control System for Traffic Light Based on GPRS
Authors: Guo Sheng Hui , Zhu Xue Li , Zhu Shu Xian , Zhu Yong Jun
Published: August 2011

On the basis of brief analysis of the deficiencies of the existing traffic light control system. According to the actual needs of the traffic light, a traffic light control system with remote monitoring by using GPRS wireless module is designed. ForceControl configuration software is used as the monitoring software in the control center. To achieve traffic light control and running test, it exchanges information with each intersection of the field control system through GPRS wireless and communication network. The system realizes wireless remote monitoring of traffic lights, retrenches monitoring cost, improves the system stability and reliability, and facilitates the transformation of the system and the increase of traffic intersections.
Effect of Zr Content on Properties of Mg-Zr PM Damping Alloys
Authors: Liu Zi Li , Fei Fei , Shen Ping , Zhou Gui Bin , Liu Xi Qin
Published: August 2011

Mg-xZr damping alloys (x=0.6, 1.5, 2.5, 5, mass %) were prepared by PM (powder metallurgy ) technology, and effects of Zr contents on microstructure, mechanical properties and damping capacities of Mg-xZr damping alloys were researched by three-point bending test and DMA, etc. The results show that the microstructure become into strip-shaped morphology, more granular particles appear in the grain boundaries or inside grains, and the grains are more refined with the increase of Zr additions. Micro-hardness and bending strength of the Mg-xZr damping alloys increase with increasing addition of Zr, and reach the maximum value with Zr addition of 2.5%. The damping capacities of Mg-xZr alloys increase slowly with the temperature from 27°C to 100°C, and increase rapidly above 100°C. The damping peaks appear at temperature of 160°C. Mg-5％Zr alloy exhibits the highest damping capacity, and its tanf value reaches to 0.084. The temperature of the damping peak increases with increasing frequencies, showing the characteristic of relaxation damping.
Monitoring of Microorganisms Growth Process Based on Fiber Bragg Grating Biosensor
Authors: Zhao Ming Fu , Huang De Yi , Jiao Lei Zi , Cao Xue Mei , Han Xi
Published: August 2011

The low refractive index sensing principle of the fiber Bragg grating (FBG) was analyzed theoretically, the temperature compensation scheme corresponding to the theoretical model was established. A single-end etched FBG was designed and fabricated for simultaneous measurement of temperature and refractive index. The experimental results demonstrated that the Bragg wavelength shift exhibits a nonlinear behavior with the temperature and yeast refractive index changes. The temperature change to the influence of the sensor was eliminated by numerical analysis, and then the relationship between the Bragg wavelength shift and the yeast refractive index is linear, the sensor yeast refractive index sensitivity of 5.42nm/riu was obtained.
The Study on the Electrolyte Behavior of Aromatic Polyesters from Diphenolic Acid and Isophthaloyl Chloride
Authors: Zhang Ping , Wu Lin Bo , Li Bo Geng
Published: August 2011

The aromatic polyester from diphenolic acid and isophthaloyl chloride was synthesized by interfacial polycondensation with tetrabutylammonium chloride as phase transfer catalyst. The structure was characterized by means of FTIR. The poly(DPA-IPC) solution was titrated by aqueous HCl solution. The titration curves were obtained. The trend of reduced viscosity of solution with concentration was studied. Besides, the stability of poly(DPA-IPC) in aqueous basic solution was discussed.
Effect of Sol-Gel Method for Medium Steel Phosphating Coating of Electrochemical Behavior
Authors: Hao Jian Jun , Liu Xin Yuan , Wang Chong Rui , Dong Chun Yan
Published: August 2011

An attempt has been made to increase the corrosion resistance properties of medium steel substrate by using silica sol.The results show that: sol-gel method can increase corrosion resistance of phosphating coating. PS(silicon sol coated after phosphating )’s corrosion potential reduced more than P(phosphating sample)’s and its corrosion density also reduced.Polarizationg resistance of PS can improved many times.R2 of PS more reduced than P,but R3 improved more than ten times and R4 improved over sixty times by using equivalent circuit to fit EIS measurement. Corrosion resistance of PS was higher than that of P.
The Trend Change of Bitumen Research: A Text Mining Analysis (2000-2010)
Authors: Wu Shiang Hau , Guo Jiann Jong
Published: August 2011

In recent years, much research has been devoted to the Bitumen research; however, few have deployed the study of the research trend. In fact, grasping the research trend is imperative for enterprises and researchers. The study aims at analyzing the trend change of Bitumen research from 2000 to 2010. The contribution of the study includes the following two points. First, the study has found the shift of the Bitumen research from “distribution” and “sand” related issues to the focuses of “surface” and “polymer”. Second, the study finds a new way of literature survey by using the text mining method in order to explore the trend change.
Analysis of Steel Industry Workers Abridged Life Table
Authors: Yin Su Feng , Zhao Ying , Li Sha , Wu Jian Hui
Published: August 2011

In order to find out the steel industre workers’ health conditions and the pattern of the change in this industre, we used the abridged life table to work out the life expectancy. We got the following results: the life expectancy for the steel industre workers in 2000 was 74.02 years, for men was 72.44 years and for women was 75.72 years. The results showed that the level of the steel industre workers’ health was significantly improved.
Study on Power Load Forecasting Base on Grey Prediction Model by Slip Average Method
Authors: Jia Zheng Yuan , Huang Zhi Wei , Wang Chun Mei , Zhang Gang
Published: August 2011

The grey control theory is used to predict electric power demand in this paper. Original data is processed by the Generation Method. Many unimportant factors affecting electric power demand are removed,and useful information is extracted from original data. The differential fitting equation is set up,and grey prediction model modified by slip average method is presented with residual modification. The current year data is possessed with high weight,which avoids excessive fluctuation. Predicting results show that the model is effective to improve the predict precision.
Study on Green Supply Chain Management Based on Circular Economy
Authors: Zhou Li Jun , Li Hua
Published: August 2011

Developing circular economy has important practical significance in improving resource development and utilization rate, relieving pressure on the environment, achieving sustainable social and economic development and realizing the harmonious development of human society. The paper starts with the definition of the connotation of circular economy and green supply chain and further compares the distinction between green supply chain and traditional supply chain. Then, analyses shall be mainly made about the contents of green supply chain management based on circular economy. Finally, the prospect shall be forecast for the implementation of green supply chain management in China.
Continuous Processing Technology of Wool Slenderizing Integrated with Biologic Enzyme Modification
Authors: Ji Yi Ping , Wang Rui , Jiang Xiu Ming
Published: August 2011

The continuous processing technology of wool slenderizing integrated with biologic enzyme modification is introduced in this paper. Fiber fineness is obviously reduced by this technology, at the same time, wool scales are efficiently removed. Thus, wool quality is also largely enhanced. This provides favorable raw materials for the development of high added value products.
The Factors Influencing the Band Gap Bowing of III Nitride Alloys
Authors: Zhao Chuan Zhen , Yu Li Yuan , Tang Chun Xiao , Li Ming , Zhang Jian Xin
Published: August 2011

In the paper, the factors influencing the band gap bowing of the bulk alloy with random distribution are analyzed and it is found that the bowing coefficient is compositional dependent. The reasons for the large dispersion of the bowing coefficient are also analyzed. In addition, we obtained the bowing coefficient (b=2.26+5.04x) for InAlN by fitting the experimental data.
DNA Electrochemical Biosensor Based on Chitosan and Core-Shell Au@SiO2 Nanoparticles
Authors: Zhou Cun , Zhang Ai Chun
Published: August 2011

In this paper, an efficient process for preparing monodisperse gold nanoparticles coated with silica shells (Au@SiO2) was reported, and a novel DNA electrochemical biosensor based on layer-by-layer self-assembled technology as well as Au@SiO2 nanoparticles was presented. Chitosan was immobilized on gold electrode by good film-forming property and lots of amino because of strong electrostatic adsorption effect between amino and gold atom, Au@SiO2 nanoparticles were also immobilized to the electrode in that it kept the excellent features of gold nanoparticles, therefore, thoil group modified DNA (SH-ssDNA) probe sequence can self-assembled on Au@SiO2 nanoparticles modified electrode with the purpose of realize quantitative detection of complementary DNA. Cyclic voltammetry (CV) and differential pulse voltammetry (DPV) were applied to investigate the electrochemical behavior of different modified electrodes with methylene blue as hybrid indicator. The results in optimization experiment condition show that: the peak current difference value pre and post hybridization was linearly related to the logatithmic value of the target DNA concentration ranging from 10-10~10-6mol/L. A detection limit of 4.02×10-11mol/L can be estimated.
Analysis on the Application of Ceramic Materials in Package - The Application of Ceramic Bottle in the Package of Jinjiu
Authors: Zheng Yong , Jin Bai Yang
Published: August 2011

Jinjiu’s ceramic bottle has been in China’s wine market for a few years, and the choice of ceramics reflects traditional Chinese design idea of “combination of object and practicability, and manifestation of life with object”， which satisfies consumers’ requirements about national traits, style and taste of wine. This paper will analyze how Jiujin Group skillfully adopted China’s traditional ceramic technology to the design of package and explore a successful way of national package of wine through the example of Jiujin.
The Analysis of Aluminum Alloy Microstructure Changes in Strong Alternating Magnetic Field
Authors: Chen Ge Xin , Xiao Hong , Fu Yu Ming
Published: August 2011

The change of aluminum alloy microstructure before and after strong alternating magnetic treatment in the aluminum alloy LY12 after the thermal plastic figuration is studied in experimental ways using strong alternating magnetic field generator.By comparing microstructure before and after strong alternating magnetic treatment, the changes of microstructure component organization is analyzed to make further analysis of the organizational factors that leads to aluminum alloy LY12 microstructure’s refinement after thermal plastic figuration caused by alternating magnetic field.
The Application of Intelligent Laser Sensor on Yarn Quality Inspection
Authors: Wang Yun Ying , Huang Qi Lan , Yang Gong Yuan
Published: August 2011

In order to improve the modernization of textile production, single off-line testing will miss a lot of information of work-field. It is necessary to improve the yarn quality testing methods to make it more perfect. So the production will grow toward the rapid, high yield, high-quality. In this study, only a sensor that is Intelligent laser sensor is used to finish the yarn quality on line testing. Experimental device is easy to install and carry. It can print images and data at all times. The accurate information of equipment state and yarn can be got from the experimental curve and the trend figure, which improved the inspection efficiency and accuracy of yarn quality.
Intelligent Detection of Yarn Supply Tension during Flat Knitting Process
Authors: Zhao Min , Yang Kun
Published: August 2011

Yarn supply tension is a key factor which has influences on the quality of knitted fabrics. This paper introduces a method to detect the yarn tension during knitting action. A 3-rollor tension sensor was adopted and a sensory system was assembled on a flat knitting machine. A single chip microcomputer and a specially designed circuit were used for the signal capturing and transmission. Yarn tension changes during the knitting process was recorded and displayed by a PC. In order to verify the validity, several experiments were arranged. The results indicate that the yarn tension can be detected, recorded and displayed. After analyzing the tension curves, it is founded that the knitting action especially the yarn elastic properties and feed spring performance affects the yarn supply tension. We also find this method is practical.
Finite Element Analysis of Spindle for Turning Center Based on ANSYS
Authors: Li Jin Hua , Liu Yong Xian , Yu Yang , Han Jia Liang
Published: August 2011

The designed spindle of turning center is researched. There are two groups of the spring-damper elements to simulate the bearings. The spindle is modeled to be 3D FEM parametric model, and the static analysis, model analysis and harmonic analysis are finished in ANSYS. Static stiffness, natural frequency and dynamic stiffness are calculated, the danger points are checked according to the resonance modes, and the performance of the spindle is verified to be reliable.
Research on Cutting Force of Milling Aviation Aluminum Alloy
Authors: Liu Jin Hui , Guo Yan Yan , Bu Guang Bin
Published: August 2011

In this paper, a milling test for aeronautic aluminum alloy 7050-T7451 was carried out and the cutting force was measured. The least square method was used to make a regression analysis on testing data and the experiential formula for milling was established. The influencing laws of cutting parameters on cutting force were educed, which can offer an important reference for optimizing cutting parameters.
Surface Quality Analysis in Mill-Grinding of SiCp/Al
Authors: Yao Y.X. , Du Jin Guang , Li Jian Guang , Zhao H.
Published: August 2011

Mill-grinding experiments were carried out on SiCp/Al to investigate effects of mill-grinding parameters and grinding wheel parameters on machined surface roughness in this paper. The machined surface topography was also analyzed. Experimental results show that surface roughness increases with increasing feed rate and the depth of the mill-grinding. The effect of mill-grinding speed on surface roughness is low. The machined surface reveals many defects. The fine grit diamond grinding wheel can reduce the surface roughness and decrease the machined surface defect. Compared to the vitrified bonded diamond and electroplated diamond grinding wheels used in the experiment, the resin-based diamond grinding wheel produces a better surface.
3D Model Registration Based on Feature Extraction
Authors: Zhu Jiang , Takekuma Yuichi , Tanaka Tomohisa , Saito Yoshio
Published: August 2011

Currently, design and processing of complicated model are enabled by the progress of the CAD/CAM system. In shape measurement, high precision measurement is performed using CMM. In order to evaluate the machined part, the designed model made by CAD system the point cloud data provided by the measurement system are analyzed and compared. Usually, the designed CAD model and measured point cloud data are made in the different coordinate systems, it is necessary to register those models in the same coordinate system for evaluation. In this research, a 3D model registration method based on feature extraction and iterative closest point (ICP) algorithm is proposed. It could efficiently and accurately register two models in different coordinate systems, and effectively avoid the problem of localized solution.
Study of Friction Stir Welding Technics and Weld Performance of Dissimilar 6063-3A21 Aluminum Alloys
Authors: Wang Lei , Zhu Jian Jun , Zhang Wei , Feng Xing Mei , Feng Zhan Ying
Published: August 2011

Several rotating rates and welding speeds were chosen to joint 6063/3A21 dissimilar aluminum alloys, tensile strength of the welds were measured to analyze effect of welding parameters on weld performance. Results show that tensile strength of the weld is better than the base material. Weld tensile strength will decrease under a too high or too low welding speed while effect of rotating rate on weld strength is relatively small. The weakest position is at heat affected zone at 3A21 side after T6 post weld heat treatment.
Influence Analysis of Machining Errors on Bearing Capability of Internal Gear Pair
Authors: Huang Kai , Zhang Yan Dong
Published: August 2011

The gear pair model with machining errors is constructed based on the software such as Pro/E and ANSYS, and in this basis, the influence analysis about the machining errors on the bearing capability is carried out. The analysis results show that the said influence varies with the increase of load, and however, the tooth profile modification would be more important compared with the machining errors.
A Regression Model for Force and Surface Roughness Estimation during Hard Turning
Authors: Bartarya Gaurav , Choudhury S.K.
Published: August 2011

Forces in Hard turning can be used to evaluate the performance of the process. Cutting parameters have their own influence on the cutting forces on the tool. The present work is an attempt to develop a force prediction model based on full factorial design of experiments for machining EN31 steel (equivalent to AISI 52100 steel) using uncoated CBN tool. The force and surface roughness regression models were developed using the data from various set of experiments with in the range of parameters selected. The predictions from the models were compared with the measured force and surface roughness values. The ANOVA analysis was undertaken to test the goodness of fit of data.
Synthesis and Properties of Cerium Oxide Nanoparticles
Authors: Li Yong , He Jin Gui , Huang Xiao Wei
Published: August 2011

Cerium oxide(CeO2)nanoparticles were synthesized via a precipitation method using cerous sulfate, ammonia water and cetyl three methyl brominated ammoniu(CTAB) as raw materials. The effect of thermal treatment temperature and dispersing agent on the crystal structure and morphology were discussed. The structural evolutions and morphological characteristics of the nanoparticles were investigated using X-ray diffractometery, scanning electron microscopy, Fourier transform infrared spectroscopy. The results showed that the broadening of CeO2peaks decreases by the increasing in heat-treatment temperature and the dispersing agent playes key roles in microstructure of the CeO2.
Study on the Speed Control of Diesel Engine Based on Neural Sliding Mode Control
Authors: Zhang Jian , Lan He Hui , Sun Yu
Published: August 2011

A neural adaptive controller based on System Recognition and sliding mode control theory is proposed. Matlab/Simulink simulations show that the controller has a good performance in the speed control system of diesel engine.
Optimization Design of Double Wishbone Front Independent Suspension Based on ADAMS
Authors: Tian Zhong Hui , Wang Shu Fen , Li Yu Guang
Published: August 2011

Kinematics simulation model of double wishbone independent suspension of a car made in China was established based on ADAMS, and the curves of the alignment parameters of the suspension were analyzed. Aiming at the toe angle changed widely, taking the minimum variation of the wheel alignment parameters and sideway displacement as optimization goal, the multi-objective optimization of the suspension was calculated by using ADAMS/Insight. The simulation results showed the variation of toe angle reduced greatly, the performance of the suspension was improved to some extent, achieving the aim to optimization.
Random Vibration Analysis of Heavy-Duty Truck Based on Pseudo Excitation
Authors: Qin Yu Ying , Wang Jing Qian , Tian Guo Hong
Published: August 2011

This paper discusses pseudo excitation method and constructs pseudo six-wheel pseudo excitation. For the complexity of heavy-duty truck, construction of vibration model is difficult for real structures; thirteen-degree-of-freedom full model is constructed for heavy-duty truck. Taken frequency response function as a bridge, pseudo excitation method is applied and a new method is gained for statistical characteristics of heavy-duty truck. The result shows that the method for random vibration of heavy-duty truck is feasible and convenient by constructing six-wheel road pseudo excitation and obtaining power spectral densities of vibration responses.
Surface Reconstruction of Auto Outer Door Panel Based on Reverse Engineering
Authors: Tian Guo Hong , Wu Xiu Chunb , Su Xue Shenc , Li Kun
Published: August 2011

The point clouds data of auto outer door panel is measured with CMM. After data processing and extracting of contour line feature, the surface is reconstructed in CATIA software. With the example, the process of reverse design how to acquire CAD model of product from actual object or sample is studied.
AHP Approach for Supplier Selection in a Polyamide Fiber Plant in Supply Chain Management
Authors: Jin Hui , Liu Chun Ling , Wang Xing Yu
Published: August 2011

Supplier evaluation and selection is one of the most important components of supply chain, which influence the long term commitments and performance of the plant. Supplier selection is a complex multi-criteria problem which includes both qualitative and quantitative factors. In order to select the best suppliers it is essential to make a trade off between these tangible and intangible factors some of which may conflict. In this paper, an AHP-based supplier selection model is formulated and then applied to a real case study for a polyamide fiber plant in China. The use of the proposed model indicates that it can be applied to improve and assist decision making to resolve the supplier selection problem in choosing the optimal supplier combination.
Simulation for Vehicle Handling Performance Based on the Cybernetic Model of “Driver-Vehicle-Road” Closed-Loop System
Authors: He Hui , Zhang Kun , Wang Peng
Published: August 2011

In this paper, a cybernetic model of “driver-vehicle-road” closed-loop system including a driver model and a steering system model is built under the MATLAB/Simulink environment. Then, the influence of different dynamic characteristics of steering system on vehicle handling and stability is studied. The results suggest that the “driver-vehicle” model built has a high tracking precision in following the path; Increasing the rigidity of steering system or decreasing the dilatory distance of front tire can enhance the tracking precision and can minish the driving burden and the fatalness of side-tip, the total evaluation result of vehicle performance will be optimized as well.
Effect of Asynchronous Rolling on Deforming Texture in Al Alloy 6111
Authors: Chen Yang , Gao Qi Mei , Tian Ni
Published: August 2011

The rolling texture and its distribution along thickness direction in the Al alloy 6111 sheet cold rolled by synchronous Rolling and asynchronous rolling have been investigated with orientation distribution functions. The results show that the texture distribution is asymmetric on both sides of center layer of the sheet after cross shear rolling. The orientation densities of the main texture compounds on the slow roller side are higher, but are lower on the fast rolled side. The asymmetry of the texture distribution increases with improving the velocity ratio of asynchronous rolling.
Using the Law of “Three Points and Two Sections” to Reduce the Risk of Vehicle Collisions
Authors: Tang Yang Shan , Wang Li Ying , Yang Chuan
Published: August 2011

This paper studies the traffic accident prevention rules of “three points and two sections”, according to a series of dynamic environmental factors such as road conditions, traffic conditions, weather and so on, the safe distance of driving vehicles on the road sections is determined. After establishing a certain relationship between the law of “three points and two sections” and the safe distance of driving vehicles, use the relationship to indicate that the range of safe driving distance between vehicles, and propose some reasonable and appropriate measures for such problems to reduce the risk of vehicle collisions.
Research on the Nanophase Reinforce Cu Alloy
Authors: Zhao Mei , Wang Hong Xin , Jin Guang Can , Yu Jian Hua
Published: August 2011

The microstructure of as-cast state and as-aged of a Cu-0.43Cr-0.22Zr-0.092Mg alloy were analysized by TEM and HRTEM, and the formation mechanics of nanophase during heat treatment were discussed. The research showed that precipitations came from the microstructure of casting alloy which adjacent streak spacing were 1.2nm after aging, which obeyed the Nishyama-Wasserman orientation relationship with the matrix.
Effects of the Valence Electron Structures of Nitride on Cold Shortness in Steel
Authors: Zhou Li Dai , Chen Guo Wei , Yin Gui Li
Published: August 2011

Up to now, most of work focused on the grain boundary segregation and the cold shortness caused by non-metallic element of nitrogen had been done. However, it is not clear that the reasons why the nitrogen element can generate the grain boundary segregation and the cold shortness at electron structural level. Therefore, based on the empirical electron theory of solids and molecules(EET), valence electron structures of α-Fe-N, Fe4N and AlN were calculated, and the cold shortness generated by the nitrogen element as well as the removal mechanism of cold shortness with the help of Al element were analyzed with the phase structure factor nA. It was found that the phase structure unit of α-Fe-N with bigger nAfirstly segregates on grain boundary，then the Fe4N with smaller nAon grain boundary was precipitated from supersaturated solid solution α-Fe-N, resulting in the formation of Fe4N+α-Fe hybrid followed by the cold short in steel. However, because the value of AlN is larger than that of TiN and VN, the addition of Al element can make the cold shortness starting point decrease distinctly and thus result in the removal of segregation of nitrogen and cold shortness generated by Fe4N. The results analyzed with the EET were in agreement with experimental fact.
The Effect of CF Modification on the Flexural and Tribological Properties of PTFE Composites
Authors: Wang Wen Xia
Published: August 2011

The effects of CF content on flexural and tribological properties of the composites were investigated. The worn surface morphologies of neat PTFE and its composites were examined by scanning electron microscopy (SEM) and the wear mechanisms were discussed. The presence of CF particles dispersed in the PTFE continuous phase exhibited superior tribological characteristics to unfilled PTFE.
Study on Microstructure and Mechanical Properties of Hot Rolled Steel Plate Strengthened Complexly by Titanium and Molybdenum
Authors: Wang Hong Bin , Li Sheng Li , Niu Chun Tang
Published: August 2011

Microstructure and mechanical properties of hot rolled steel plate strengthened complexly by titanium and molybdenum at different final rolling temperature and coiling temperature were studied by optical microscope (OM) and material testing machine. The precipitation behaviors of precipitates phase were obtained using transmission electron microscope (TEM) with EDS analysis. The results showed that at final temperature 850°C, microstructure of experimental steel were fine, uniform polygonal ferrite and acicular ferrite. With the coiling temperature decreasing from 620°C to 580 °C, the grain of polygonal ferrite became finer, and the amounts of acicular ferrite became more; precipitates phase mainly maintained both coarse TiN and small square round sheet (Ti,Mo)C. On the condition of the final rolling temperature (850°C) and coiling temperature (580°C), experimental steel acquired properties as follows: yield strength 608 MPa, tensile strength 720 MPa, elongation 24%. Ti-Mo composite strengthening effect had achieved, and significantly improved the strength of ferrite steel.
Development of 360 MPa Grade Heavy Plate with High Performance
Authors: Li Jing , Liu Xiang Hua , Wang Bing Xin , Lian Jing Bao , Wang Wen Guang
Published: August 2011

360MPa grade heavy plate with high performance was developed through TMCP technology. By means of tensile and charpy impact tests and optical microscopy, the effects of processing parameters on final microstructure and properties of the steel have been studied, such as start rolling temperature in austenite non-recrystallization region and cooling rate. In order to obtain better mechanical properties, the optimization of the rolling process in an experiment rolling mill has been carried out. It has been found that the tensile strength of HSLA heavy plate are significantly improved by decreasing the start rolling temperature and increasing of the cooling rate, but the impact properties present the reverse law.
Research on Process Parameters Optimization of Squeeze Casting for AZ91D Magnesium Alloy
Authors: Xu Hui , Li Tian Sheng
Published: August 2011

Cast magnesium alloys are constantly increasing used in the automotive and electronic industry because of the excellent performance. Squeeze casting is an innovative and energy-saving manufacturing process which can be used to produce near net-shape magnesium components. In order to improve the quality of the squeeze casting，the different process parameters were adopted to study the forming property of AZ91D alloy by applying multifactor orthogonal test and analysis of range under the laboratory condition. The metal pouring and die temperatures considered in the investigation were within the range of 680-780 and 300°C respectively. The results showed that the samples’ synthetic mechanical properties was the best, and squeeze casting can refine grain and the second phase particle β(Al12Mg17)separated out more by using mechanical properties test and analyzing microstructure when casting temperature is 730°C, squeezing force is 100 Mpa and time of keeping forces 25s.
The Vehicle Dynamic Load Indentification under the Excitation of Random Road Surface
Authors: Zhang Li Ping , Guo Li Xin
Published: August 2011

In this paper, inverse pseudo excitation method for vehicle dynamic load identification is used. When the vehicle is in stationary random vibration, the vehicle dynamic load spectrum recognition problem is solved by using the deterministic method. The auto-PSD and cross-PSD of vehicle vibration response is known. Base on the reversing the power spectrum of road excitation, Vehicle dynamic load PSD is obtained. The results show that, Inverse pseudo excitation method for solving the vehicle dynamic load spectrum has good solution accuracy, put forward new ideas and methods for vehicle engineering practice, and has broad application prospects.