bluuebunny/crossref_metadata_2025 huggingface dataset:
CV Control Chart Using GWMA Technique
Authors: Hong Eui Pyo , Kang Hae Woon , Kang Chang Wook , Baik Jae Won
Published: September 2011

When the production run is short and process parameters change frequently, it is difficult to monitor the process using traditional control charts. In such a case, the coefficient of variation (CV) is very useful for monitoring the process variability. The CV control chart, however, is not sensitive at small shifts in the magnitude of CV. This study suggest the CV-GWMA(generally weighted moving average) control chart, combining the GWMA technique, which shows better performance than the EWMA(exponentially weighted moving average) or DEWMA(double exponentially weighted moving average) technique in detecting small shifts of the process. Through a performance evaluation, the proposed control chart showed more excellent performance than the existing CV-EWMA control chart or the CV-DEWMA control chart in detecting small shifts in CV.
Numerical Simulation on Forced Revolving Moving Boundary Problem Using Incompressible SPH (ISPH)
Authors: Dong Tian Wen , Jiang Shun Liang , Huang Xing Yuan , Liu He Sheng , Huang Qiang Qiang
Published: September 2011

One forced revolving moving boundary problem model was constructed and simulated by incompressible SPH (ISPH). The dummy particles are used to deal the moving boundary. The tensile instability is avoided by setting a reference pressure. Compared with the results produced by FLUENT, the method was proved to be more practical and effective. The method is applicable to the more complex 3D model.
Numerical Simulation for Thick-Walled Hollow Axle during Cross Wedge Rolling
Authors: Jiang Yang , Wang Bao Yu , Hu Zheng Huan , Lin Jian Guo
Published: September 2011

The paper investigates a process of cross wedged rolling (CWR) for manufacturing thick-walled hollow axles. A finite element numerical model coupled deformation and heat transfer of CWR is established using commercial finite element software DEFORM-3D. The rolling process of hollow axle during CWR is simulated successfully. The stress, strain and temperature distributions of workpiece are obtained and analyzed. The simulation results show that forming thick-walled hollow axles through CWR is feasible.
Studies on Corrosion Behavior of Q235 Steel by Iron Bacteria, Sulfate-Reducing Bacteria and Total General Bacteria in Sedimentary Water of Storage Tank
Authors: Chen Dong Sheng , Zhou Yong Zhang , Liu Min , Guo Kai Wei , Wei Wu Ji
Published: September 2011

The corrosion behavior of Q235 steel by Iron Bacteria (IB), Sulfate-reducing Bacteria (SRB) and Total General Bacteria (TGB) in sedimentary water of storage tank from an aromatics plant was investigated mainly by static hanging piece method, potentiodynamic polarization curve and hysteresis loop method. The results showed that the interaction of IB, SRB and TGB accelerated the corrosion rate of Q235 steel. The corrosion current density of Q235 steel electrode in IB, SRB and TGB solution was higher than that in the sterile solution, and the corrosion potential shifted in negative direction. IB, SRB and TGB reduced the corrosion resistance of Q235 steel. The corrosion of Q235 steel in the mixture of IB, SRB and TGB was more serious than in a single microbial system. The presence of IB, SRB and TGB made the pitting occur easily.
Simulation Study on the Frame of Pipe End Upsetting Machine and its Structure Optimization
Authors: Gu Rui Jie , Lei Gang , Shao Guo Dong , Ren Ming Jie , Jing Yun Hai , Zhou Shao Fan
Published: September 2011

The FE model of the frame of pipe end upsetting machine is built with FE simulation software ABAQUS in the study. With the FE model, the force status of the frame is studied. By which, it is found that stress concentration occurs at the inner corner of the frame and bigger corner radius can improve the stress status; the stress of main cylinder body on the up beam is high because of the action of hydraulic press; the frame is bent outward in the up-down direction and bent inward in the left-right direction when the tube is clamped tightly; the earlier deformation of the frame is improved when the tube is upset, but the torsion deformation is found in the frame; the frame is optimized and the strength and the stiffness of the optimized frame can be satisfied with the requirement of application. The results of the study are very useful to design the frame of the pipe end upsetting machine.
The Research of the Extrusion Hot Embossing Process
Authors: Liu Wen Long , Wu Da Ming , Liu Ying , Zheng Xiu Ting
Published: September 2011

In this paper,we analysed the problems that existed in the extrusion hot embossing process.To slove these problems,we designed a new extrusion hot embossing process and verified the effectiveness and feasibility of this process through experiments.The thickness and temperature of the extruded polymer film were affected by various factors.It is very difficult to ensure the uniformity of thickness and temperature before the polymer film enters into the hot embossing machine.Therefore,we add a planish unit and a temperature control unit to ensure the uniformity of thickness and temperature of the polymer film.At the same time,we produce the polymer film with microstructure on its surface by this two differern process sepatately and make some tests.The results show that:the new process greatly improved the uniformity of the thickness and temperature compared with the original embossing process.In this new process the uniformity of the thickness and temperature was better ensured.
The Influence of Welding Speed for Aluminum 6063 and Aluminum 7075 by the Friction Stirs Welding
Authors: Pumchan Wichai
Published: September 2011

The main purpose of this paper to application of a friction stirs welding. In an aluminum alloy rolled sheet, grade 6063 and 7075 by variables parameter feed welding speed after that the specimen are taken tensile strength test and macro structure. In summary, the results showed parameter to make major changes to the weld is incomplete and welding defects when the speed feed not appropriate. But still result in the metal welded. There is strong evidence that higher than the base material. The position of the damage caused by testing the strength of the weld the base aluminum 6063 which is the metal with a lower strength compared to base aluminum 7075. Conditions to provide the maximum strength is 108 MPa for the 1000 rpm speed, a welding speed 100 mm / min
Optimisation of Die Radius Geometry in Sheet Metal Stamping
Authors: Wang Xuan Zhi , Masood S.H.
Published: September 2011

Advanced high strength steels (AHSS) are increasingly utilised in sheet metal stamping in the automotive manufacture. In comparison with conventional steels, AHSS stampings produce higher contact pressures at the interface between the tool-workpiece interface, leading to more severe wear conditions, particularly at the draw die radius. To minimise tool wear using this approach it would be necessary to optimise the shape for a particular combination of circular and high elliptical profiles. This paper presents a methodology to optimise a die radius profile. For this, a specialised software routine is developed and compiled for optimisation of die radius profiles to minimise or achieve uniform contact pressure (wear distribution) using Python computer programming language supported by Abaqus software. A detailed algorithm for the optimisation is explained. A case study based on the algorithm is also discussed.
Influence of the Alloying Elements on Phase Transitions of High Strength Steels
Authors: Neugebauer Reimund , Rautenstrauch Anja , Meza Garcia Enrique
Published: September 2011

Continuous Cooling Transformation (CCT) diagrams determined with a dilatometer were used to analyse the influence of the alloying elements on the phase transitions of high strength steel sheet alloys. Mo and Cr additions showed a significant influence on the extension of the bainitic region, whereas C and B additions showed noteworthy improvement on the quenchability of these steel alloys. These alloy properties are desirable requirements to be integrated in hot formed components. In addition to these experimental results, thermodynamic calculations were done with help of the JMatPro software in order to analyse the effect of Mn and C on the resulting mechanical properties as function of the quenching rate.
The Joining of Oxide Ceramics with Quartz Fiber by Interlayer
Authors: Zhao Ying Na , Zhang Wen Li , Hou Gui Qin , Liu Li Hong
Published: September 2011

The joining of ZrO2 ceramic and quartz fiber was realized by glass interlayer heat-treatment at 800 °C for 1h. Using the low-temperature liquid reaction of B2O3-SiO2 and B2O3-ZrO2 and the properties change of borosilicate glass, the two kind materials of different thermal expansion coefficients achieved joint by B2O3 as the interlayer material. Through observing the micro-morphology of joint samples at different heat-treatment temperature, and combining with the fibers’ high temperature properties, the optimum joining temperature was investigated. According to the phase diagrams of B2O3-SiO2 and B2O3-ZrO2 and SEM results of joints region, the joint mechanism of density ceramics and fiber weaves was discussed in detail.
Interfacial Reaction and Solderability of Zn20SnxCu Solder
Authors: Zhao Kuai Le , Yan Yan Fu , Sheng Yang Yang , Du Ning , Liu Zhan Lei
Published: September 2011

Zn20Sn solder with the melting point of 383.9°C and a low cost is considered as an ideal high-temperature lead-free solder. In the paper a new solder alloys were made by adding trace Cu into Zn20Sn alloy through alloying principle. Interfacial reaction and solderability of Zn20SnxCu (x=0 wt.%, 2 wt.%, 4 wt.% and 6 wt.%) solder on the copper substrate were investigated. Results showed that β’-CuZn, γ-Cu5Zn8 and ε-CuZn5 IMC layers were formed at the interface of Zn20SnxCu/Cu. The spreading areas of the Zn20SnxCu solders were reduced linearly with the increasing of the content of copper. The spreading aera of Zn20Sn solder was 52.88 mm2 while that of Zn20Sn6Cu was 50.82mm2 which was approximately 3.9% smaller than that of matrix solder. It is mainly related to the formation of ε-CuZn5 phase and the metal intermetallic compound between the solder and the substrate.
Study on Thermoplastic Materials and Absorbing Agent in Laser Transmission Welding
Authors: Wang Zhen , Wang Yun Shan , Lei Jian Bo
Published: September 2011

Laser transmission welding of plastics is a joining technique which permits the welding of plastic parts with low process inherent thermal and small welding heat response area. It has high demand of process parameters and material characteristic. In order to study thermoplastic materials properties and ir-absorbing agent in laser transmission welding, experiments were taken under the same process parameters. The YAG laser Output power 200W, working distance 25mm, movement speed 10mm / s. Through the experimental results, we concluded that the different welding quality of different materials and absorbing agent, and analyzed its material characteristic reasons.
The Effect of Single Pulse, Double Pulse and ForceArc MIG Welding Technology on Mechanical Properties of Welding Joint for 5083 Aluminum Alloy Used in High-Speed Train Body
Authors: Su Lei , Nie Yuan , Ji Hua , Ma Chuan Ping , Yan Shao Hua , Wang Li Jun , Chen Hui , Meng Li Chun
Published: September 2011

The technology of lightening manufacture for aluminum alloy train body is one key of manufacturing high-speed train . The train body is a whole bearing loading tubular structure which is welded together by the large, hollow, thin-walled aluminum extrusion. Therefore，the demand for welding quality of aluminum alloy train body is very high，and the mechanical properties of joints severely affected the overall strength of welded components. To solve this problem ,we use the 421 EXPERT forceArc MIG of PHOENIX series of German EWM company to perform three types of experiments of single pulse, double pulse, and forceArc welding ,and then effect of three welding methods on mechanical properties of Welding joint for 5083 aluminum alloy used in high-speed train body is compared.
Study on Properties of Electroless Ni-P Plating on 6063A Aluminum Alloy
Authors: Qiu Xing Wu , Zhang Yun Peng , Liu Chun Ge
Published: September 2011

In order to improve 6063A aluminium surface condition, electroless plating technology was used to obtain Ni-P coating on 6063A aluminium surface, the properties of Ni-P coating were investigated by means of scanning electron microscopy (SEM), X-ray diffractometer, microhardness teste, coating adhesion nick meter and electrochemical workstations. The result indicate that, the Ni-P coating shows a amorphous structure with compact structure, the hardness is about 4 times of substrate; the combination of the coating and the substrate is good, the strength for 42.25 N; after electroless plating, self-corrosion potential shift for positive direction for 0.55 V, the self-corrosion current density lower two orders of magnitude compare to the substrate, polarization resistance significantly increased, which shows that after electroless Ni-P plating, the corrosion resistance increase apparently.
Structural and Optoelectrical Properties of Aluminum-Doped Zinc Oxide Thin Films for Organic Photovoltaic Cells
Authors: Gu J.H. , Zhong Zhi You , Yang C.Y.
Published: September 2011

Thin films of transparent conducting aluminum-doped zinc oxide (ZnO:Al) were grown by rf magnetron sputtering technique using a sintered ceramic target of ZnAl2O4. The microstructure and optoelectrical properties of the deposited films were characterized wiyh XRD, four-point probe and spectrophotometer. The results show that the polycrystalline ZnO:Al films consist of the hexagonal crystal structures with c-axis as the preferred growth orientation normal to the substrate, and that the substrate temperature significantly affects the crystal structures and optoelectrical properties of the thin films. The ZnO:Al films deposited at the substrate temperature of 670 K has the relatively well crystallinity, the largest crystal grain, the highest transmittance and the highest figure of merit.
Corrosion Resistance of Ni-CeO2 Nanocomposite Coating Prepared by Electrodeposition with Rotating Cathode in an Ultrasonic Field
Authors: Zhang De Ying , Xue Yu Jun , Li Xian Hui , Li Ji Shun
Published: September 2011

Ni-CeO2nanocomposite coatings were prepared by electrodeposition with rotating cathode in an ultrasonic field. The surface morphology of the coatings was examined. Effects of different electrodeposition methods, ultrasonic power and cathode rotating speed on the corrosion rate of Ni-CeO2nanocomposite coatings were analyzed. The results show that the corrosion rate of the coatings decreases considerably with the increasing of ultrasonic power, and suitable cathode rotating speed could decrease the corrosion rate of coatings. During the process of electrodeposition, the CeO2nanoparticles, ultrasonic and rotating cathode influence on the surface morphology of the coatings. The nanocomposite coating obtained by rotating cathode in an ultrasonic field exhibits refined crystal grains and presents an excellent corrosion resistance.
Effects of Different Fluxes on the Spreadability of Zn-20Sn Solders
Authors: Sheng Yang Yang , Yan Yan Fu , Zhao Kuai Le , Xu Zhi Wei
Published: September 2011

The spreadability of Zn-20Sn solders on Cu substrate was researched by using self-made flux, silver brazing 102 and medium activity rosin (RMA), and the characteristics of intermetallic compounds the appearance of solder joints were compared and analyzed at soldering joints. Results indicated that Zn-20Sn solders exhibited excellent spreadability by using self-made flux. A shoot IMC layer was closed to the solder while a flat IMC layer was presenting adjacent to the Cu substrate and the middle layer. Moreover, the characteristics of IMC and the appearances of soldered joints varied by using different fluxes.
Foundation and Application of Fluid End’s Vibration Model for Drilling Reciprocation Pump
Authors: Lv Miao Rong , Li Mei , Chen Zhi Qiang , Wang Li
Published: September 2011

With the help of digital audio technology, fault diagnosis and quick identification of multi-channel synchronous vibration signals acquired from a triplex pump in well site were achieved. A characteristic model of fluid end’s vibration for this pump was established and further verified by indoor systematic experiments. The source of various vibration components was determined, statistic relationships between these components in different conditions were regressed, and typical sub-signals excited by pump valve movement were also modeled by the use of the basic operation unit segmentation and optimal frequency matching method. These works provide a favorable tool for identifying the pump vibration signals, fault diagnosis, and dynamic modeling of drilling reciprocating pump in future. Such results also have a good contribution to study vibration problems on other types of reciprocating machinery.
Study on NC Machining of Parts with Rotational Characteristic
Authors: Wang Wei Fang , Zhou Wan Lin
Published: September 2011

CNC machining tool is the core application technology of equipment manufacturing and the key to modern manufacturing industry, which is of great significance to improve processing quality and efficiency. In general, parts with rotational characteristic are most common in NC machining. In this paper, some problems that are often encountered during NC Machining of Parts with Rotational Characteristic are introduced, and the reasons and solutions are also given.
Properties of Hexagonal Wurtzite Mg0.33Zn0.67O Films on Quartz Glass Substrates
Authors: Liu Quan Sheng , Zhang Xi Yan , Wang Xiao Chun , Bai Zhao Hui , Wang Neng Li , Mi Xiao Yun , Lu Li Ping , Yuan Dong Fang
Published: September 2011

Mg0.33Zn0.67Ofilms were prepared on quartz glass substrates by Sol-Gel method. Structures and optical properties of Mg0.33Zn0.67Ofilms were studied. The results of XRD analysis indicates that the Mg0.33Zn0.67Ofilm is hexagonal wurtzite structure and the lattice constants a and c are 0.3265nm and 0.5218 nm respectively. Lattice constants a and c of the Mg0.33Zn0.67O film increased because of the addition of Mg. The image of SEM shows that the Mg0.33Zn0.67O film is homogeneous and its average grain size is about 40nm. The absorption spectrum of the sample reveals that the absorption edge of Mg0.33Zn0.67O film located at 312.3nm and the corresponding forbidden band width is 3.97eV. is by three peaks ，which located at 383.9nm，442.6nm and 532.9nm respectively，constitute the luminescence spectrum of the film. The excitation peak located at 379.9nm.
Magnetic Pulse Forming of Thin-Aluminum Sheet Using Bar-Forming Coil
Authors: Shim Ji Yeon , Kim Ill Soo , Park Dong Hwan , Kang Bong Yong
Published: September 2011

Generally a MPF(Magnetic pulse forming) process refers to the high velocity and high strain rate deformation of a low-ductility materials driven by electromagnetic forces that are generated by the rapid discharge current through the forming coil. The goal of this study was to investigate the main design parameter in MPF. To achieve the above objectives, An intelligent system which consisted of thin 5053 aluminum sheet and bar forming coil was employed for the experiment. The measured strain data have been analyzed using the developed electromagnetic FE-model. The analysis data showed that the uniform electromagnetic force is one of most important design parameters in MPF process.
Research on Photoelectric Properties of Nanowires Doped DSSC
Authors: Cong Wei , Lin Yao , Xu Li Yuan
Published: September 2011

TiO2light anode film is one of the most important part of DSSC. But the microscopic structure of nano-Tio2is not perfect,it exists the problem such as big or small size, excessive internal, insufficient specific surface area which dye and electronic adsorption ability is limited. The micron ball mainly constituted by nanowires is manufactured through experiments in this article,and it is doped into P25 paste in appropriate proportion. The new method that improving the efficiency of DSSC can be summarized by improving TiO2film microstructure through analysising and contrasting in experiments.
Deep Drawing Formability Analysis of AZ31 Mg-Alloy
Authors: Sakamoto Hidetoshi , Ohbuchi Yoshifumi , Kuramae Hiroyuki , Shi Jian
Published: September 2011

Light and highly resistant, magnesium has been more and more included into alloys composition, especially in automotive and electronic devices. Usual automotive applications for magnesium alloys are gearbox, cylinder head covers and other types of covers, when electronic industry uses this alloys for mobile computers and mobile phones frames (chassis). However casting is still the first production process for magnesium application, press forming is considered as having significant potential. Yet, influences of many key parameters are not clearly known. In this report, sheets of AZ31 magnesium alloy were submit to deep drawing tests to investigate the influence of temperature, lubricant, blank holding pressure and speed. As a result, an appropriate lubricant was selected out of a set of potentially interesting lubricants selected with respect to their announced properties. Deep drawing tests also enlighten the poor formability of AZ31 even at 160°C and an apparent optimum formability temperature at 200°C. Other tests and controls, like thickness profile, were also performed to complete knowledge of AZ31 properties.
Finite Element Analysis of Machine Tool Bed
Authors: Sun Lei , Wang Ming Hai , Li Xiao Peng , Sun Yue
Published: September 2011

Taking machine tool bed as example,the modal analysis and harmonic response analysis were done by means of finite element method. Find out its characteristics of vibration modal. The analysis is conducive to the design of the machine tool bed. It makes a base for optimized design and remanufacturing.
Wear Behaviors of PCD Tools in Turning Granite
Authors: Zhang Rui , Kou Zi Li , Dou Yun Wei , Liu Shen Zhuo , Wang Hai Kuo , Wang Kai Xue , Chen Ying , Ma Huan , Liu Cheng Liang
Published: September 2011

The performance and wear mechanisms of two types of polycrystalline diamond (PCD) cutting tools (marked as PCD 010 and PCD 030) have been investigated in this paper. Continuous turning of round granite bars has been selected as the test method. The Taylor equation has been developed to describe the tool performance. The experimental results indicate that PCD 010 has a greater thermal wear resistance than PCD 030 at high cutting speeds. Scanning electron microscopy (SEM) was used to evaluate wear mechanisms of PCD tools, our results show that the dominant wear mechanisms for PCD 010 is abrasion wear while that for PCD 030 is inter-granular and cleavage wear.
Lifting Pipeline Buckling under External Pressure Base on Imperfect Reason
Authors: Zhou Zhi Jin , Wang Zhao , Xia Yi Min
Published: September 2011

The deep-sea pipe is an important part of mining lifting projects in the ocean floor. The uniqueness of environment conditions and design needs to determine the unforeseeable risks and challenges during the laying of pipeline. Based on extensive studies of loads acted on the pipeline and corresponding possible limit states for each installation method, a series of investigations on load-carrying capacity and buckling response of pipes under different loading combinations and various types defects (such as uniform ovalities)were carried out. In these calculations, the collapse pressure has been associated with the pressure maximum of a uniformly deforming long pipe. In experiments in a stiff pressure lifting pipelines, collapse is always localized as shown in Figures 3 and 4.However,because pipe’s localization takes place after the pressure maximum, the collapse pressure yielded by the 2-D analysis suffices for most cases. Exceptions are pipes with local imperfections, in the form of dents. The adequacy of this important conclusion will be demonstrated in the future application, where such predictions are compared to experiments.
Analytic Research of Finite Element on the Mold Plates of High Pressure Slip Casting Machine Used for Daily Ceramics
Authors: Huang Zhi Cheng
Published: September 2011

Outlined the principles of high-pressure slip casting , this paper finished the modeling of the mold plates of a certain type of high-pressure slip casting machine used for daily ceramics, and then carried out finite element static analysis for it , The result can privileged that the strength and stiffness was meet the design requirements.
Innovation Design of Complex Equipment Based on the Multi-Granularity Structures
Authors: Ren Bin , Yi Guo Dong
Published: September 2011

Innovation design is a process that makes it easily to satisfy individual customer demands. This study is aimed to realize the innovation design of complex equipment with better satisfaction to the individual customer needs. Firstly, the optimization mathematical model of innovation design was established. Secondly, structural repository of multi-granularity was developed to support innovation design. Finally, in the application of the design of hydro cylinder of injection molding equipment, we demonstrated that our method successfully generated new designs with optimal design lifetime.
Modelling the Processing Parameters of Rotary Curved Surface Grinding Using RSM
Authors: Deng Zhao Hui , Wan Lin Lin , Zhang Xiao Hong , Li Sheng Chao
Published: September 2011

The NC grinding of Si3N4 ceramics rotary curved surface workpieces was carried on the CNC jig grinders, combining the nomal tracing grinding and the arc envelope forming grinding. According to the grinding track, a grinding surface scallop height model was built. The model analysis indicated that workpiece curvature, wheel radius and feed rate affected the surface roughness. A prediction model based on the response surface methodology (RSM) was built to study the influences of these processing parameters on the surface roughness, using the Box-Behnken design to design the grinding experiments. It was shown that the surface roughness of rotary curved surface workpieces grinding which increased with increasing workpiece curvature could be reduced by chosen larger radius wheel and lower feed rate. The confidence and practicality of the prediction model is high in experimental conditions. The process parameters can be selected to improve the quality of the surface based on the model of the paper.
Non-Probabilistic Reliability Analysis Based on Interval Interference & Disjoint Model
Authors: Liu Xiao , Xu Ge Ning , Yang Ping
Published: September 2011

According to the distribution type of the uncertain parameters not acquired accurately in the probabilistic reliability, the interval model was used to describe the uncertain parameters. Various calculation methods were used to research the non-probabilistic reliability responding to different condition between the stress interval and the resistance interval. The reliability index of the transmission shaft of a mechanical device was compared between probabilistic reliability and non-probabilistic reliability. And the corresponding changes of the non-probabilistic reliability index were observed with different deviation of the uncertain parameters, analysis of non-probabilistic index has shown that with the increasing uncertain level of the parameter, the non-probabilistic reliability of propeller shaft was gradually reducing. And uncertain level of the different design parameter had a distinct influence on reliability index.
CSFs for Pre-Development Implementation of New Product Development in Small and Medium-Sized Enterprises
Authors: Abu Noor Hidayah , Deros Baba M. , Wahab Dzuraidah Abdul , Rahman Mohd Nizam Ab
Published: September 2011

Success in the pre-development process is important for every organization in order to compete with competitors. In order to survive, organizations need to introduce new products in the marketplace drastically. In view of that, understanding critical success factors (CSFs) that contribute to successfully implementing pre-development is becoming more important. However, most of the past studies were conducted in large organizations; very little has been done in small and medium-size enterprises (SMEs). SMEs have certain limitations in terms of their financial, human, and technical resources that could hinder their progress towards implementing the pre-development. This paper reviews and analyses CSFs developed by previous authors in order to propose a set of CSFs, which were thought to be critical for SMEs. Besides, pre-testing with pre-development experts and SMEs practitioners, the questionnaire was also validated through a pilot study with fifty five SMEs. The questionnaire was designed comprising three compulsory activities of pre-development and CSFs for successful pre-development implementation. The final form of the questionnaire consists of twenty five items of pre-development activities within four constructs, and thirty six items of CSFs within nine constructs. Through systematic identification and validation, it is hoped that the set of CSFs could be used as guides for SMEs to implement the pre-development process successfully.
Analysis on the Increasing Gearbox Cooling System of Wind Power Generator Based on ADINA
Authors: Fan Wei , Liu Xin
Published: September 2011

As the core components in the wind power generator set, the maintenance of gear box is very difficult, and its maintenance fee also is extremely high. To prevent gearbox teeth fault injuries in the supernormal heavy load, the driving friction heat distribution and heat transfer characteristics of wind power gear box are studied, the wind power generator increasing gearbox structure characteristics are analyzed. The parametric model of increasing gearbox is completed in UG software and finite element analysis of gear temperature and heat stress is conducted in ADINA software. Through the analysis on the calculation results, the design idea of wind power generator cooling system is summarized, and provides theoretical basis for the design of increasing gearbox cooling system for wind power generator.
Dynamical Simulation Model of Auger Miner's Working Mechanism Based on Virtual Prototyping Technology
Authors: Fu Lin , Du Chang Long , Gao Kui Dong
Published: September 2011

In order to do research on dynamic characteristics of auger miner’s working mechanism, three-dimensional entity model was built by software Pro/E, some components of working mechanism were made flexible and corresponding Modal Neutral Files were created by software ANSYS. Through the date exchange among Pro/E, ANSYS and ADAMS, dynamical simulation model of working mechanism was built in ADAMS environment. ADAMS/vibration, a plugin in ADAMS, can solve the dynamical simulation model and obtain dynamic characteristics of working mechanism. The establishment of the model can lay the foundation for the research on dynamic characteristics of working mechanism. The resolved results of the model can provide reference for structural design and performance improvements of working mechanism.
Rigid-Plastic FEM Simulation of Orthogonal Cutting Process
Authors: Zhu Jiang Xin , Deng Jian Xin
Published: September 2011

This paper presents a rigid-plastic finite element method for orthogonal cutting process by adopting Lagrange method. The rigid-plastic FEM analysis model is established and the rigid-plastic FEM analysis toolkit was developed. Meanwhile, two relevant key problems are discussed systematically, including the rule of chip-workpiece separation and the criterion of tool-chip separation. At last, a simulation example of planing an aluminium alloy (ZL-301) workpiece was conducted. The effects of the cutting stroke, the tool rake angle and the friction coefficient on chip were observed. The numerical simulation results have a good agreement with their experimental ones. It is indicated that the presented FEM model and algorithm are efficient and correct.
Semi-Automatic Platen Die-Cutting Mechanism’s Optimization Design Based on CAE Technology
Authors: Song Rong , Chu Jian Zhong , Wu Bai Zhong
Published: September 2011

Against the currently existing design and development problem of complex mechanism such as long design cycle, high manufacturing costs and so on, it offers a optimal design method of mechanism based on CAE and use Semi-automatic platen die-cutting mechanism as design example to explain how to use UG Motion Simulation module not only analyze the existing problem, but also optimal design in detail.
Study on the Temperature Field of Jet Plug-in Hot Blast Furnace
Authors: Wang Xue Ping , Zhang Zhen Wei , Zhang Hong Bo
Published: September 2011

This paper primarily focuses on the analysis on the heat exchange part’s temperature field of the jet plug-in hot blast furnace aiming at obtaining the temperature distribution of the heat exchange part. The authors took advantage of the method of the finite element analysis to study the temperature field. Through the analysis, local high temperature of the heat exchange part can be figured out. The paper also analyzes the parts with great temperature difference, study the reasons of causing these phenomenon and the negative impact on the furnace. The conclusion of this paper provides the basis for the further enhancement of the machine life and optimization of the structure design.
A Slice Finite Element Model for Bending Analysis of Curved Beams
Authors: Jiang Wen Guang , Yan Li Juan
Published: September 2011

The pure bending analysis of curved beams may be performed by finite element modelling of only a representative slice sector of the beam cross-section, by establishing exact deformation relationships between degrees of freedom of corresponding nodes on the corresponding artificial cross-sectional boundaries. These deformation relationships can be conveniently realized using constraint equations between nodal degrees of freedom. Numerical example has been given to demonstrate the accuracy and effectiveness of the proposed method.
Study on Rail Weighbridge Shear Stress Sensor Optimal Installation Size Based on ANSYS
Authors: Xu Jin Li , Xia Bing , Chen Zhi Lei
Published: September 2011

For gaining the best position ranges of shear sensor on webs, this paper make a finite-element analysis on force measurement rail's webs of shear rail weigher. And we also use a standard force measurement equipment to test it, the test results showed that the repetitive accuracy of rail weighing system reached national standards 0.2 level, international standards, 0.5 level .
Green Design for Multi-Purpose Dovetail Groove Board
Authors: Huang Yin Hua , Zhao Shi Qi
Published: September 2011

In order to make design for board to achieve the miniaturization, multi-purpose, recycling; and to pursue the energy conservation, saving materials, little waste, the closed circuit in the technology, it is necessary to carry on the research of green design for board. Based on analyzing requirement of the market adequately, green design for multi-purpose dovetail groove board is presented. The research primary including: Firstly, choice of material for green design of board; Secondly, design for disassembly of board; Thirdly, design for recycling & recovering of board; finally, applications of board. The research has certain theory value and the practice significance.
A Fuzzy Product Configuration Design Method Based on Decision Table
Authors: Ma Tie Qiang , Xu Cheng Yin
Published: September 2011

To solve the problem on the indeterminacy of customers’ demands, a new fuzzy configuration design based on decision table is presented. Generalized product configuration model is proposed and taken as the basic of configuration design. Generalized product configuration model is composed of generalized product structure BOM，structure-function units and configuration rules. Configuration rule is expressed with decision table, and it constrains the process of the configuration design. Fuzzy theory is applied in configuration design. Configuration engine accesses decision table and carries out the configuration reasoning with fuzzy theory in configuration design. Finally, the application on the transmission system of wind turbine verifies the feasibility and validity of this method.
Thermoelastic Analysis of an Heterogeneous Orthotropic Nose Cap for a Hypersonic Vehicle
Authors: Cheng Xing Hua , Yang Tao , Chang Zhong Dong
Published: September 2011

Considering xz plane heterogeneous mechanical properties and thermal-pressure loads, thermoelastic analysis is applied on orthotropic nose cap of a hypersonic vehicle in the flight trajectory. The results show that the thermal-stress of sphere section presents annular, the Mises equivalent stress is of periodicity of 90° in tail so obviously that a reasonable connection is important. Finally, two connections, bolted and plug connection, are considered to relax the overnice tail constrains, and the results show that the plug connection is reasonable for the hypersonic heterogeneous orthotropic nose cap
Error Inspection for Turbine Vane Based on Reverse Engineering
Authors: Tong Gang , Li Yu Zhu , Wu Da Wei , Han Xiao Guang
Published: September 2011

An error inspection method based on 3D laser scanning measurement is proposed for the purpose of achieving field rapid inspection of turbine vane surface. The 3D model of vane is reconstructed by using the data of form drawing in CATIA. By using handy laser scanner, the point cloud data is obtained from the wood pattern of vane, which is processed in Geomagic Qualify. After registration of vane solid model and point cloud data, the vane surface is rapidly inspected by analyzing 3D error and comparing cross-sectional data.
Synthesis of Ultrafine TiC from TiOSO4 and Phenol–formaldehyde Resins
Authors: Li Peng Fei , Wu Yi , Shen Yu Fang , Li Jie
Published: September 2011

The paper presents a novel process for synthesis of ultrafine titanium carbide by reaction between TiOSO4 and Phenol-formaldehyde resins at different temperatures in the range of 1450°C–1500°C under argon cover for 1 hr. It was a new low-cost synthetic route for fabricating ultrafine TiC powders. The thermodynamic and reaction processes about phenolic resin’s cracking and reducing in the system of titanium oxide were studied. When the organic cracking reaction ended at 1000°C, amorphous carbon was provided by phenolic resin’s cracking. The grain size distribution of TiC synthesized from organic carbon was more narrower than that from inorganic carbon.
Development on CAD System of Tri-Cone Bits Based on UG
Authors: Kuang Yu Chun , Wang Qin , Wu Yong Xing , Hu Yue Hua
Published: September 2011

This paper develops a set of tri-cone bit CAD system based on UG platform relying on using parametric design idea; studies the systematic structure and development principle of the cone bit CAD system; molds the cone, tooth and tooth slot by using the basic theory of parametric design and feature modeling corresponding to the example, and realizes the assembly of cone and tooth and virtual assembly of three cones. This system interface is simple, intuitive, easy to operate, and has good human-computer interaction and scalability and portability. This paper provides a research base for the developing a more perfect tri-cone bit CAD system on UG.
Damage Modes Detection of Composite Laminates Using Improved Modal Strain Energy Method
Authors: Hui Jia , Wan Xiao Peng , Zhao Mei Ying
Published: September 2011

Damage causes changes in structural parameters, which in turn, modify dynamic properties, such as natural frequencies and mode shapes. Based on this assumption, this paper presents a new approach to detect different damage modes of composite laminates. Finite element modal analysis is performed on the composite laminate to obtain the modal mode shapes used to compute the modal strain energy. Consequently, an improved damage index is defined by using the ratio of modal strain energies of composite laminates before and after damage. The proposed method is validated using a numerical simulation of a composite laminate with damages in some elements, which are simulated by reducing elements’ material stiffness properties under a combined material properties degradation rule. The result shows that six kinds of damage modes of composite laminates can be detected by this method preferably and give a qualitative description for the damage level.
Influence of Acoustic Coating on the Underwater Sound Radiation of a Double Hull Cylindrical Shell Structure
Authors: Pang Fu Zhen , Pang Fu Bin , Yin Xu Chao , Lv Shuai
Published: September 2011

This paper studies the influence of acoustic coating to the underwater sound radiation characteristic of a double hull cylindrical shell by the Statistical Energy Analysis (SEA) method. Influence of covering density and laying location of acoustic coating to the underwater sound radiation characteristic of the double hull cylindrical shell structure are discussed. Study shows that low covering density of acoustic coating will cause “sound leaking” phenomena, sound will leak out from the uncovered area of the double hull cylindrical hull structure and radiate into the surrounding water, which harms the underwater noise reduction performance of the acoustic coating; however, the noise reduction capacity of the acoustic coating improves gradually as the covering density increases. Besides, laying location of acoustic coating also impact the underwater sound radiation performance of the double hull cylindrical shell structure; inner hull covered with acoustic coating is better than the outer hull covered from the noise treatment point of view
A Calculation Method of Vibration Fatigue Life with Coupling Effect
Authors: Liu Wen Guang , He Hong Lin
Published: September 2011

There are different modes of damage in any engineering structures, and most of them are cracks. In order to study the influence of coupling effect on the fatigue life, a calculation method of structure vibration fatigue life with crack propagation is proposed. In analysis, a series of finite element model with crack of different length is built to simulate the crack propagation, and Paris equation is employed to calculate the vibration fatigue life by stepwise method. The crack initiation life is got based on the change law of natural frequency from test results, and the total life is calculated in the end. Results indicate that the simulation results identical with the experimental results well.
Fabrication of Capsaicin Loaded Polyvinyl Alcohol Electrospun Nanofibers
Authors: Ngawhirunpat Tanasait , Rojanarata Theerasak , Panomsuk Suwannee , Opanasopit Praneet
Published: September 2011

The aim of this study was to prepare and characterize electrospun polyvinyl alcohol (PVA) nanofiber mats loaded with capsaicin (CC) as a transdermal drug delivery system. The amount of CC loaded in the base PVA solution (10 %w/v solution) was 0.025, 0.0375 and 0.05 %, based on the dry weight of PVA (% wt). The average diameters of these fibers ranged from 121 to 165 nm. In all concentrations of CC loaded in spun PVA fiber mats, an amorphous nanodispersion of CC with PVA was obtained. The tensile strength of the as-spun fiber mats was lower than that of the as-cast PVA films. The release rate of CC from CC-loaded as-spun PVA was significantly higher than from CC-loaded as-cast PVA films, and increased when the CC content in both CC-loaded as-spun PVA and CC-loaded as-cast PVA films increased. Our research suggests a potential use for CC-loaded electrospun PVA mats as a transdermal drug delivery system.
Analysis of Multiple Degrees of Freedom Vibration Isolation System Using the State Space Method
Authors: Luo Yu Feng , Li Yuan Shan , Chen Xu
Published: September 2011

This papers deals with fast solving method of natural frequency and vibration isolation coefficient of multiple degrees of freedom vibration isolation system. In the foundation of a mathematical model of vibration motion differential equation, a new state space method is derived and presented. Through transforming the vibration isolation differential equations into the state space equations, it is convenient to facilitate the solution of vibration isolation coefficient of vibration isolation system of multiple degrees of freedom with damping, by using the state space method and the MATLAB/Simulink module. Simulation results showed the result is consistent with the theory result. Simulation results also showed that with the help of damping, the maximal vibration isolation coefficient of x direction is lowered from 90 to 3.2 in the 5.31Hz, which eliminate the resonance phenomenon. In y and z direction, the maximal vibration isolation coefficient is also decreased from 78 to 2.4 and from 210 to 2.35. The state space method can find further applications on the selection of vibration isolation system and the evaluation of vibration isolation efficiency.
Identification Method of Vehicle Interior Airborne Noise Based on Pseudo-Random
Authors: Liang Jie , Tang Rong Jiang , Gao Yin Han , Zhao Tong Hang , Jiang Wen Jun , Lu Bing Wu
Published: September 2011

According to the source-path-receiver model of vehicle interior airborne noise, the correlative identification method of transfer function was proposed. Simulation results demonstrate that the method has excellent noise immunity performance. A m sequence generator whose shift clock frequency is adjustable and register series is optional was designed by complex programmable logic device CPLD and external circuit. The m sequence pseudo-random signal which was amplified by audio power amplifier drives the loudspeaker as sound source signal. The field tests indicate that compare with broadband white noise sweep method, the identification method based on m sequence technique has advantages in noise suppression.
The Shock Isolation System Optimum Design Based on Pseudo Parallel Improved Genetic Algorithm
Authors: Jiang Guo He , Wu Gang
Published: September 2011

Based on the vertical maximum displacement response, the paper uses a new pseudo—parallel improved genetic algorithm (PPIGA) to optimize mass and stiffness of the shock isolation system. In the process of optimization the Newmark procedure is used to calculate shock response. The optimization results show that the optimization parameter (mass and stiffness) can satisfy restricting condition and the multi—objects optimization can be realized．
Analysis of Transverse Vibration of Axially Moving Viscoelastic Sandwich Beam with Time-Dependent Velocity
Authors: Lv Hai Wei , Li Ying Hui , Liu Qi Kuan , Li Liang
Published: September 2011

Transverse vibration of an axially moving viscoelastic sandwich beam is investigated in this paper. Based on the Kelvin constitutive equation, transverse controlling equation is established. First of all, the multiple scales method is applied to obtained steady-state response. Elimination of scales terms will give us the amplitude of vibrations. Additionally, the stability conditions of trivial and non-trivial solutions are analyzed using Routh-Hurwitz criterion. Eventually, numerical results are obtained to show the thickness of core layer, mean velocity, the amplitude of fluctuation effects on natural frequencies and response curves.
The Effect of Surfactant on the Morphology of SnO2 Nanoarrays
Authors: Wang Ya Li , Jing Yu , Zhen Qiang
Published: September 2011

The morphology of SnO2nanoarrays prepared on indium tin oxide (ITO) substrates by hydrothermal method can be controlled through using different surfactants. The surfactants play an important role in influencing the morphology and size of SnO2nanoarrays. The rod-like nano-arrays prepared by using cationic surfactant, disordered structure randomly assembled by nanoparticle obtained by using anionic surfactant, the flower-like nanoarrays synthesized by using nonionic surfactant. Furthermore, the effect of the amount of nonionic surfactant-polyvinyl pyrrolidone(PVP) on the morphology and size of flower-like SnO2nanoarrays has systematically been investigated.