bluuebunny/crossref_metadata_2025 huggingface dataset:
Damage Study of 22Cr2Ni4MoVA Steel in Artificial Crystal Growing Environment
Authors: Huang Jian Ping , Liu Kang Lin
Published: February 2012

Through the chemical analysis, mechanical properties tests, metallographic analysis, fracture and fatigue tests on 22Cr2Ni4MoVA steel cut from deactivated crystal kettle which had been used for 9 years, we obtained a variety of mechanical properties data, and confirmed that the yield strength and ultimate strength of 22Cr2Ni4MoVA steel were basically unchanged in crystal growing environment, but the impact energy, sectional shrinkage and fracture toughness that reflect material toughness were significantly descend, and there existed serious embrittlement and creep deformation. The failure mode of 22Cr2Ni4MoVA steel was brittle fracture under the co-activation of creep fatigue and corrosion. The decline of creep deformation and endurance limit at high temperature played a guiding role; fatigue and corrosion played an initiative attacking role; and temper brittleness acted in degenerating, losing immunity and increasing crack sensitivity; while the stress concentration on kettle bottom and alkaline solution with high concentration provided a breeding ground for failure.
Research on Self-Tuning Fuzzy PID Control Strategy of Metallurgy Furnace Temperature
Authors: Luo Rong , Chen Lun Wei , Ren Hong Bo , Liu Cheng Yu
Published: February 2012

Aim at the effect of the control method in traditional metallurgy furnace temperature is not good, a self-tuning fuzzy PID control method combining fuzzy control with PID control was proposed in this paper based on the analysis of the advantages and disadvantages of the PID control and fuzzy control method, and a concrete control algorithm was put forward and simulation experiment was finished. The simulation results show that the effect of the controller is good, and the control of system is fast and smoothly according to it.
Preparation of Ni-Base Alloy Coatings on Monel Alloy by Laser Cladding
Authors: Zhang Chun Hua , Hao Yu Xi , Qi Lin , Hu Fang , Zhang Song , Wang Mao Cai
Published: February 2012

Abstract. The paper presents the results of a study concerned with the surface hardening of Inconel 625 alloys and Ni-base alloy powder on Monel alloy by electro spark deposition and laser cladding processes. The microstructure, the phase composition and the microhardness of samples are investigated by SEM, EDS, XRD and microhardness instrument. It is shown that, the matrix phase is mainly made up of dendritic structure (γ-Ni), interdendritic eutectic phase (Ni3(B,Fe,Si)) and some precipitates (Cr7C3, Cr23C6). Additional, the microhardness of laser cladding layer can be substantially increased, duo to formation of precipitates.
The Ordering System of Technical Objects Based on Meta Object Facility
Authors: Xu Jing , Chen Ping Lu , Ji Yang Jian , Qi Guo Ning
Published: February 2012

With the increase of product data, it is one of the key problems if the existing resources can be ordered and reused rapidly. Focusing on the technical objects, the framework of ordering system is proposed for the technical objects based on meta object facility. The framework of ordering system includes four layers such as the layer of technical objects, models, meta-models and meta-meta-models. The description of each layer is analyzed in detail which set forth the ordering structure, the elemental composition and the relations of elements. The application indicates that the ordering system of technical objects realizes the reusing of existing objects, improves the efficiency of enterprise personnel. It is the guide of implementation for information in future.
A Numerical Method for Solving Bilevel Optimization Based on Moving Space Response Surface
Authors: Xia Yi , Du Gang
Published: February 2012

Bilevel programming has great significance in the field of engineering optimization, but for the particularity of the model it is difficult to solve. A numerical method for solving the bilevel programming has variable range constraints only in upper-level model based on Moving Space Response Surface Fitting Optimum Solution Function (MRFOM) is proposed in this paper. Some bilevel programming for the engineering optimization is hard to solve by mathematical method because the lower-level function expressions are hard to get because the lower-level optimizations are performed by specialty optimization software. MRFOM is specially applicable for this condition. Result shows that it has a good computing effect for the application of engineering optimization.
Research on the Blind Area in the Display Zone of the Automobile Dashboard
Authors: Sun Lin Lin , Kong Fan Sen , Yu Duo Nian , Lan Bao , Mu Si Qi
Published: February 2012

Visual field of the driver will impact directly on the active safety of the automobile. In this paper, the Chinese eye ellipse in 95th percentile was established based on the modified Chinese physical dimensions data and the equation which is used to position the ellipse with the AHP as the reference point was deduced, providing reference for the design and check work of the automobile visual field. Parameterized model which is used to calculate the blind area in the display zone of the dashboard is built, basing on the Chinese eye ellipse in 95th percentile and its position equation. When the design parameter is changed, the blind area will update synchronously according to the geometric relationship between each dimension, and this characteristic of the model is helpful to avoid redundant design, reduce designers' burden and save time.
Study on Evacuation Strategy in High-Rise Buildings Fire
Authors: Lu Shan , Liu Wen Shuo , Weng Xun , Li Fang Zhou
Published: February 2012

This paper first proves the practicability of evacuation using elevators in high-rise buildings fire. Analyzing characteristics of the evacuation by elevators, the paper put forward an improved evacuation strategy and the corresponded improved evacuation model. In order to further prove the improved evacuation strategy can shorten the evacuation time, taking a certain building for example, this paper design many projects of evacuation, which based on different evacuation strategies. Finally, the paper modeling and simulating these projects with simulation software, results showed by simulation models can prove the large superiority of improved evacuation strategy.
Fabrication of Semisolid Billets of Hypereutectic Al-Si Alloy by Severe Plastic Deformation and Remelting
Authors: Shi Hai Xia , Lu De Hong , Gong Hui , Zhou Rong
Published: February 2012

This paper preliminarily explored and proved the feasibility of fabricating semisolid thixoforming billets for a hypereutectic Al-Si alloy (AlSi29Fe3) by severe plastic deformation (SPD) and semisolid remelting. In this paper, friction stir processing (FSP) was used to refine the coarse primary silicon particles and needle-shaped iron-rich phase of the hypereutectic Al-Si alloy. The results show that the semisolid thixoforming billets obtained by the above route contain fine spherical Al grains with mean size of 34m, and second-phase particles (both primary silicon and iron-rich intermetallic) of less than 10m. The microstructure is ideal non-dendritic semisolid structure. Therefore, SPD and remelting is a promising technology for the fabrication of semisolid thixoforming billets of the hypereutectic Al-Si alloy.
Researches on Joint Distribution in Urban Logistics
Authors: Zhang Qing Ying , Chen Jun Hui , Tao Yu Min
Published: February 2012

Consumer demands are getting increasingly delicate and personalized, while retailers’ stocking is changing into an advanced mode with more varieties, smaller quantities and multi-batch. As an advanced delivery model, joint distribution is capable to integrate social resources, improve logistics distribution efficiency, ease urban traffic and reduce environmental pollution, and to improve the urban logistics. Basic concepts and operation models are discussed in the paper, and several suggestions for solving the existing problems are proposed.
Design and Implementation of Heavy Container Handling Equipment Maintenance System
Authors: Lu Hou Jun , Zhen Hui Qiang , Mi Wei Jian
Published: February 2012

Heavy handling equipment is the key factor to improve the level of logistic service in container terminal. In order to solve the problem of information sharing in maintenance management, this paper integrates the equipment information which locates in different spatial location on the container terminal and analysis the traditional maintenance method, giving the construction and functional modules of maintenance system, which will reduce the cost of heavy container handling equipment maintenance and improves the operational efficiency of terminal.
Productivity Growth in Chinese Construction Industry Considering Solid Wastes Generation
Authors: Li Qian , Song Yu
Published: February 2012

This paper employs the Malmquist-Luenberger Index to measure the productivity growth of the construction industry in China over 1997 to 2010 accounting for solid wastes produced. The average annual productivity growth is 5.38%.
Solving Lot-Sizing and Sequencing Integrated Optimization Problems in Mixed-Model Production Systems
Authors: Wang Bing Gang
Published: February 2012

This paper is concerned about the lot-sizing and sequencing integrated optimization problems in mixed-model production systems composed of one mixed-model assembly line and one fabrication flow line. The optimization objective is minimizing the total makespan cost in regular hour, the overtime makespan cost and the holding cost in the whole production system. The mathematic models are presented and an adaptive genetic algorithm is developed for solving this problem. A traditional genetic algorithm is also designed for testing the optimization performance of the adaptive genetic algorithm. Computational experiments are conducted and the optimization results are compared between the above two algorithms. The comparison results show that the adaptive genetic algorithm is a feasible and effective method for solving this problem.
Sustainable Supply Chain Management: A Case Study From Indian Automotive Industry
Authors: Kumar Sanjeev , Chattopadhyaya Somnath , Sharma Vinay
Published: February 2012

This study aims to investigate the sustainable supply chain management practices likely to be adopted by the manufacturing industry of automotive products in India. The approach of the present research includes a literature review, in depth interviews and questionnaire surveys. The relationship between sustainable supply chain management practices and environmental performance is studied. The industries in the automotive products industry in India were sampled for empirical study. The data were then analyzed using statistical package for the social sciences is used as a path analysis model to verify the hypothetical construction of the study. The results indicate that performance of automotive products industry regarding eco procurement, eco accounting, eco logistic design, eco product design, eco manufacturing practices, operational performance, vendor management etc in response to the current wave of national & international green issues and also environmental performance of the respective industries.
Research on Selection of Third-Party Reverse Logistics Supplier Based on Fuzzy Analytic Hierarchy Process Method
Authors: Zhou Zhan Feng
Published: February 2012

The selection of Third-party reverse logistics supplier is key factor for the success implement of reverse logistics. In this paper an evaluation index system on the third-party logistics supplier is put forwarded according to the characteristics of reverse logistics, evaluation model is established by using the analytic hierarchy process and fuzzy synthetical method and an example of calculation is given. The result shows that the method is simple, accurate and has good application.
Elimination Technology of the Iron Dissolved in Flux Solution of Hot Dip Galvanizing Process
Authors: Moon Kyung Man , Oh Min Seok , Park Dong Hyun , Lee Myung Hoon
Published: February 2012

Hot dip galvanizing is being widely used to the numerous constructional steels such as a guard rail of high way, various types of structural steel for manufacturing ship and for some other fields etc.. Recently, the cost of zinc is getting higher and higher, thus, a proper manufacturing process should be developed possibly to reduce the cost of production. one of hot dip galvanizing process, that is, flux solution immersion process is very important to control more effective coating. However, flux solution is deteriorated with increasing its using time because dissolved iron from structural steel due to continuous flux treatment was increasingly increased, which is resulted in coating badness and increment of dross. In this study, elimination of iron dissolved in flux solution was investigated with some types of inner solution which is added with additives such as seawater, NH4OH, NaOH, NH4Cl and thiourea, and electrolysis experiment was carried out with parameters of applied current density. For elimination of iron from flux solution, it is considered that inner barrel with separator should be filled with solution different from original flux solution which is involved in iron ion, that is, the inner solution which is made up seawater added with additives such as NH4Cl (5g), NaOH(0.5g) and thiourea(0.5g) is the most desirable solution to effectively extract iron from flux solution. An optimum applied current density for the most extraction effect of iron through electrolysis experiment is thought to be 20mA/cm2 .
Effect of Cavitation on Tribological Performances for Textured Surfaces
Authors: Meng Fan Ming , Zhang Ling
Published: February 2012

The influence of cavitation in a lubricant between textured surfaces on tribological performances of the surfaces was investigated based on an extended Reynolds equation and other associated equations. The tribological performances of the surfaces holding dimples with divergent-convergent shape were analyzed with the cavitation effect consideration at different dimple numbers. In doing so, the elastic deformation of the surface is evaluated using continuous convolution fast Fourier transform (CC-FFT). Some mechanisms are revealed about the cavitation effect on the friction coefficient, friction force, load-carrying capacity and cavitated area of the textured surfaces.
3D Numerical Simulation Research on the Effect of Gate Location on Fiber Orientation and Injection-Molded Parts Deformation
Authors: Liu He Sheng , Xiong Ai Hua , Huang Xing Yuan , Lai Jia Mei
Published: February 2012

Based on generalized non-Newtonian fluid with seven parameters Cross-WLF viscosity model and modified 2-domain Tait model, the injection process of short glass fiber-reinforced polypropylene is simulated with a true 3D model. The effects of gate location on clamp force, fiber orientation and parts deformation are investigated. The results show that: (1) Clamp force of the 3rd scheme that gate location is set on the center of long-side is the largest and that of the 1st scheme that gate location is set on the center of top is the smallest. (2)Because of shear stress, in the direction of thickness, the distributions of fiber orientation are layered orderly, namely, the degree of fiber orientation in core layer is the lowest, but that in subsurface layer is the highest. While perpendicular to the shear flow, the layering distribution isn’t obvious. (3) Compared the three schemes in respect of clamp force and parts deflection, the 3rd scheme is the poorest, which should not be adopted as can as possible, while the 1st scheme and 2nd scheme are reasonable.
Fatigue Life Analysis and Structural Optimization of Drive Axle Housing Based on FE-SAFE
Authors: Zheng Shang Min , Song Shou Xu , Sun Yuan
Published: February 2012

Based on ABAQUS, the strain and stress on the drive axle housing is obtained by the static analyses. Through the model analysis, the inherent frequencies and mode shapes of front 10 order modes are obtained respectively. According to damage accumulation theory and the rain-flow counting method, and the amplitudes and mean values of counted cycles can be determined. Fatigue analysis of automotive drive axle housing under the sine load spectrum are analyzed by applying ABAQUS/FE-SAFE software, and the overall fatigue life contours and distribution of hazardous area are obtained. Under the results of analysis, the improved design of automotive drive axle housing is made. Therefore, the new methods for improving life distribution and design of automotive drive axle housing are proposed in this paper.
Geometrical Springback Compensation Algorithm Based on UV Curves for Automobile Structure Parts Die-Face
Authors: Li Gui , Liu Yu Qi , Xu Heng Jian
Published: February 2012

Springback is the most common defect in sheet metal forming. The compensation method is an effective way to overcome this defect by modifying the die-face. A new geometrical springback compensation algorithm based on UV curves is proposed for automobile structure die-face. The UV discrete technology and space lattice search approach are adopted to get the regular springback lattices from irregular and unordered springback points. The compensation direction and the correction of the pressing direction are considered. The die-face is reconstructed with a high order BEZIER spline surface on the CATIA platform. The high quality geometry compensation die-face obtained from this algorithm can be applied directly in actual machining. The geometry springback compensation of a high strength steel structure part is used to verify the effectiveness of the algorithm.
Dynamic Research of Knitting Element for Computerized Flat Knitting Machine Based on ANSYS/LS-DYNA
Authors: Fang Yuan , Xia Fan Tian
Published: February 2012

Based on research on the knitting processes, an impact mechanic model for knitting elements was established to investigate the variation of the impact force in vertical direction between the cam and the select jack. The variation of the displacement, velocity, acceleration of the select jack and the stability for the needles’ moving has been confirmed by the simulation of knitting process based on the software ANSYS/LS-DYNA. Furthermore, the variation of the select jack has been confirmed by experimental measurement during the knitting process. The data of the experiment results were in accordance with the ANSYS’ simulation which verified the correctness of the ANSYS’ analysis. It provided a theoretic basis for the design of computerized flat knitting machines.
Effect of Surface Pretreatment on Morphology and Microhardness on Carbon Coating Using PVD
Authors: Awang Shri D.N. , Ramli J. , Alang N.A. , Mahat M.M.
Published: February 2012

Alumina (Al2O3) cutting tools have been coated with carbon coating using physical vapor deposition (PVD) to improve its wear resistance. The cutting tools were subjected to surface pretreatments namely blasting and acid etching to improve the coating adhesion onto the substrates. The effects of pretreatments on the cutting tools topography prior to deposition were investigated using atomic force microscopy (AFM) while the surface morphology was investigated using scanning electron microscopy (SEM). The adhesion strength of the carbon coating was investigated using microscratch. This study shows that although the coating were deposited evenly on the surface, the cutting tool that was blasted prior to deposition has better adhesion strength when compared to acid etching and no-pretreatment.
Drying Model and Moisture Diffusion Coefficient
Authors: Liu Xian Xi , Che Jun Ruo , Zhang Sai
Published: February 2012

Varied values of moisture diffusivity estimated using Crank’s equation with different initial moisture content, equilibrium moisture content and sample thickness are often reported. However, a theoretical explanation to this phenomenon is not available to date. To explore the possible reason of this phenomenon, a Fick’s second law diffusion equation for drying samples assumed uniform initial moisture distribution and negligible external resistance is solved numerically and the solutions as drying data is used to estimate the moisture diffusion coefficient of the sample through the equation reported by Crank. The result shows the Crank’s equation used to estimate moisture diffusion coefficient could not be theoretical solution of the Fick’s second law diffusion equation and the estimated value of moisture diffusion changing with initial moisture content, equilibrium moisture content and sample thickness perhaps caused by the Crank’s equation itself.
A TiO2/Fe3+ Coated on Fibre Glass Treatment for Phenol with UV Irradiation
Authors: Wang Xi Feng , Peng Dang Cong , Hu Xiao Lian
Published: February 2012

This paper reported the study of the photocatalytic activity of immobilized Fe3+ doped TiO2 on glass fibre yarn. A dip-coating technique fixing catalyst onto the support surface was applied to get the TiO2/Fe3+ coated filler. A photo reactor consists of a cylindrical quartz tube and filler with the immobilized catalyst was applied in the study. The photocatalytic activity was determined by the degradation of phenol in water (10 mg L-1). Results suggested that the fibre glass coated TiO2/Fe3+ photocatalysis filler has very excellent performances in repeat using and the supported TiO2 was very stable in photocatalysis reaction.
Discuss of Bonding Mechanism of Al-Phosphate No-Bake Sand
Authors: Xia Lu , Zhang You Shou , Huang Jin
Published: February 2012

Adding B-ion additive or Mg-ion additive to Al-phosphate binder to get different binders, and viscosity of Al-phosphate binders and dry strength of their no-bake sand were tested, bonding mechanism among sands of Al-phosphate no-bake sand was discussed by SEM and EDS. Results indicate that Mg-ion additive can increase binder’s viscosity and dry strength of its no-bake sand more obviously than B-ion additive, adding Mg-ion additive and B-ion additive simultaneously is more obvious. Location crack produced is changed from sand surface to binding bridge inner while adding Mg-ion additive and B-ion additive simultaneously ,and fracture mode is changed from adhesive fracture mainly to cohesive fracture mainly, dry strength is improved from 0.86MPa to 2.38MPa.
Left-Side of the Forming Limit Diagram (FLD) under Superimposed Double-Sided Pressure
Authors: Liu Jian Guang , Meng Qing Yuan
Published: February 2012

Over the past decades, many kinds of double-sided pressure forming processes have been proposed to improve the formability of lightweight materials which exhibit distinctly poor forming capability. In the present study, the effects of double-sided pressure on the deformation behavior of AA5052-O aluminum alloy sheet metal under tension-compression deformation state are studied numerically using the finite element method based on the Gurson damage model. It is demonstrated that superimposed double-sided pressure significantly increases the left-side of the forming limit diagram and the formability increase value is sensitive to the strain path.
The Application of SolidWorks in Bridge Erecting Machine’s Structure Design
Authors: Shang Guan Tong Ying , Lian Yang , Wu Di
Published: February 2012

We have take the design of the complex machinery equipment DF900 erecting machine as an example discussed SolidWorks and its module COSMOSWork, COSMOSMotion’s application in bridge erecting machine’s development and design. We established bridge erecting machine’s 3D model, optimized the product’s structure and bridge through-hole speed, provide calculated data for safe and reliable operation of the equipment by finite element calculation. And have provided some certain reference value for use SolidWorks on large, complex mechanical product’s design, research and safety evaluation.
Characteristics of Electroless Nickel-Phosphorus-Potassium Titanate Whisker Composite Coating
Authors: Jin Ya Xu , Tian Yu Ming , Li Qiu Shu
Published: February 2012

Electroless nickel plating with potassium titanate whisker was co-deposited on medium carbon steel substrates. The microstructure of the composite coatings was investigated. The effect of aging temperature on the microstructure of the composite coatings was studied using X-ray diffraction. The results indicate that the composite coatings will turn into crystal state with increasing heat treatment temperature. Experimental results also show that a maximum hardness is achieved for the composite coating after heat treatment at 400°C for 1 hour. The corrosion resistance and tribological properties of the composite coatings are not inferior to those of electroless Ni-P coating.
Numerical and Experimental Approach for Incremental Thread Rolling Process of Micro-Sized Screws
Authors: Song Jung Han , Lee Hye Jin , Lee Jong Sup , Lee Geun An , Park Jeanho , Park Sung Jun , Lee Hyoung Wook
Published: February 2012

In this paper, finite element analyses of thread rolling process for the micro-sized screw with the diameter of 800 μm and the thread pitch of 200 μm are firstly carried out. For the finite element analysis of the thread rolling process, hardening behavior of SUS has been estimated by the compression and tensile tests. And then, process design has been conducted with the aid of simulations and the prototype of the micro screw finally has been fabricated. In order to verify the CAE based process design for micro-sized screws, the deformed shape and dimensions obtained from the CAE are compared with those from the experiment. The deformed shapes of the pitch part and the top part of threads can be demonstrated the feature of experimental result.
Manufacture of Hollow Cross Sectional Regenerated Cellulose Fiber Using HWM Spinning Method
Authors: Dong Zhen , Ding Zhi Rong
Published: February 2012

Traditional regenerated cellulose fiber (viscose or viscose fiber) had a poor wet breaking strength and wet modulus, which to some extent limited the application of the fiber. Hollow viscose was difficult to get for its instability during the cellulose regenerating process. This paper introduced one kind of new spinning method for hollow viscose through a spinneret of concentric shaft structure using HWM technology. The hollow viscose fiber produced in this experiment had a big crystalline structure and an excellent fibril orientation which gifted the fiber a good mechanical performance even under wet circumstances. The fiber had a bright future in textile application as one component of blending fabrics.
Design of Steering Wheel Control System of Tracked Vehicle of Hydro-Mechanical Differential Turning
Authors: Cao Fu Yi , Zhou Zhi Li , Zhao Hong Jie
Published: February 2012

The hydro-mechanical differential turning mechanism is the new type of double power flow turning mechanism of tracked vehicle. The hydraulic stepless speed regulation and the high efficiency of mechanical transmission are integrated into the turning mechanism. The stepless turning of tracked vehicle can be achieved. Basing on hydro-mechanical differential turning theory, the scheme design of steering wheel control system of tracked vehicle of hydro-mechanical differential turning is finished. By establishing model of steering wheel control system, its working stability and following characteristic is simulated and analyzed in this paper. The demand of hydro-mechanical differential turning of tracked vehicle can be realized by the steering wheel control system designed through the simulation results.
Study of Solid/Liquid Interface of Ti46Al0.5W0.5Si Ingot Directionally Solidified by a Near-Rectangular Cold Crucible
Authors: Chen Rui Run , Yang Jie Ren , Ding Hong Sheng , Guo Jing Jie , Su Yan Qing , Huang Feng , Fu Heng Zhi
Published: February 2012

In this study, Ti46Al0.5W0.5Si ingots were directionally solidified by a near-rectangular cold crucible under different process parameters. These process parameters include the electromagnetic stirring, the crucible configuration and the molten drop, all of them have important effect on the S/L interface. The effects of the parameters on the solid/liquid (S/L) interface morphology were investigated, and the mechanisms of the parameters influencing the S/L interface were discussed and revealed. Results showed that the typical S/L interface of the ingots was presented as a curved ‘W-type’ shape. The uneven temperature distribution in the front of the solidified interface is the main reason for a curved S/L interface. Further, the requirements for obtaining a planar S/L interface in the process of cold crucible directional solidification were given, which provided a guide for the future work.
Research of Automobile Engine Fault Diagnosis Based on Wavelet Packet
Authors: Tong Min Yong
Published: February 2012

A diagnosis method using wavelet packet, frequency band energy analysis and neural network was presented for the automobile engine fault diagnosis. Fault signal of automobile engine was decomposed at different frequency band by wavelet packet. According to the change of frequency band energy, fault frequency band of the automobile engine was found. Fault diagnosis knowledge is described by means of applying T-S model. Results from the experimental signal analysis show that the proposed method is effective in diagnosing the automobile engine faults.
Influence of Friction Stir Processing on Coarsening Dynamics of Fe-Rich Phase in Semi-Solid Al-Si-Fe Alloy
Authors: Gong Hui , Lu De Hong , Jiang Ye Hua , Zhou Rong
Published: February 2012

The as-cast and friction stir processed (FSP) hypereutectic AlSi29Fe3 were reheated to the semi-solid state, the coarsening dynamics of the Fe-rich phase during the process of remelting were investigated by the means of quantitatively metallurgical analysis. The results indicated that the coarsening of the Fe-rich phase in semi-solid state for both microstructures followed the Lifshitz-Slyozov-Wagner (LSW) theory:. However, the coarsening exponent n of the Fe-rich phase in the as-cast microstructure was 3, in the FSP microstructure was 2. Therefore, the growth rate of the Fe-rich phase in the FSP microstructure was larger than in the as-cast microstructure. In the meantime, the morphology of the Fe-rich phase changed to short bar from granular in the FSP microstructure.
Magnetic Assisted Roller Burnishing and Deburring of Flat Metal Surfaces
Authors: Kodácsy János , Liska János
Published: February 2012

Basically, the Magnetic Assisted (MA) processes of the surface finishing can be divided into two groups: processes based on abrasion and plastic deformation. In this paper the authors present the results of experimental and developing work regarding the Magnetic Assisted Roller Burnishing (MARB) process that operates by plastic deformation and the strain hardening effect. Using Finite Element Method (FEM) modelling software system was prepared to demonstrate the experimental results.
A Methodology of Multi-Objective Dynamic Liquid Level Measurement Based on Wireless Transmission Technology
Authors: You Bai Qiang , Huang Tian Zeng , Zhou Jian Hua , Chi Yu Han , Zhou Tao , Liu Hui Liang
Published: February 2012

A novel real-time distribute dynamic liquid measurement system is proposed with the method based on ideal gas state equation and wireless transmission technology. For the designed system, the constitution and working process, the sensitivity and stability, the error analysis of multi-objective synchronous acquisition, as well as improvement possibility are all discussed in detail. Critical parameters representing dynamic liquid volumes in distribute closed multi-objectives could be collected over some distance and resolved in the center of the system in real-time. The results show that the total accuracy of the designed system could be better than 2% within usable measurement range, if some key detectors were carefully selected.
Experimental Study of Drilling Carbon Fiber-Reinforced Plastic (CFRP) with Candlestick Drill Using the Taguchi Method
Authors: Tsao Chung Chen
Published: February 2012

In this paper, an approach is developed on Taguchi method to optimize the drilling parameters in drilling carbon fiber-reinforced plastic (CFRP) by the candlestick drill bits. The experimental results indicate that the feed rate (f) and the drill diameter (d) are the most important factors and the spindle speed (S) is insignificant in drilling CFRP laminates. The optimal drilling performance for the thrust force was obtained at 0.01 mm/rev feed rate, 800 rpm speed spindle and 6 mm drill diameter settings. The best combination to attain smaller delamination factor was 0.01 mm/rev feed rate, 800 rpm speed spindle and 10 mm drill diameter.
Fuzzy Control Design and Simulation for Drain Pipe Cleaning Robot
Authors: Wang Feng
Published: February 2012

The drainpipe cleaning robot is designed to replace the labour power to clean the municipal sewers automatically. Its main mechanical composition is the mobile carrier, cleaning tool, slide correction device, and cable following delivery and retraction mechanism, driven respectively by a stepper motor equipped with a photoelectrical encoder. Aimed at the unexpected and complex circumstances within the drainage pipeline and the undefined load, two new kinds of fuzzy control algorithms were presented to adjust the stepout of the carrier-driving motor resulting from the overload and the cable following delivery and retraction so as to ensure the stable and reliable operation. The design and simulation of the fuzzy controller were conducted by means of MATLAB and Simulink. The simulation results show that the expected control effect has been obtained because of the introduction of fuzzy control, and the control system has good robustness and anti-interference ability, which means that the fuzzy algorithms are feasible and effective.
Study on the Machining of Iron-Based Thermal Spray Coating for Sleeveless Engine Cylinder
Authors: Ding Kan , Sasahara Hiroyuki
Published: February 2012

In the cylinder of a sleeveless engine, molten iron-based alloy is directly sprayed onto the aluminum engine block instead of the previously used cast iron cylinder liner. However, a thermal spraying cylinder liner exhibits poor machining performance during the finish boring process because of severe tool wear. This research investigates the finish boring performance of a thermal spraying cylinder liner to clarify the root cause of tool wear. The results show that mechanical wear is a dominant effect.
Effect of Sintering Temperature on Microstructure and Mechanical Properties of Al2O3-TiC-ZrO2 Ceramic Composites
Authors: Liu Wei Min , Ai Xing , Zhao Jun , Zhou Yong Hui
Published: February 2012

Al2O3-TiC-ZrO2ceramic composites (ATZ) were fabricated by hot-pressed sintering. The phases and microstructure of the composites were studied by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The relative density and mechanical properties (flexural strength, fracture toughness and Vicker’s hardness) of the composites were tested. The results show that the microstructure of the composites was the gray core-white rim. With the increase of sintering temperature, the relative density and mechanical properties of the composites increased first and then decreased. The composite sintered at 1705°C has the highest synthetical properties, and its relative density, flexural strength, fracture toughness and Vickers hardness are 98.3%,970MPa,6.0 MPa•m1/2and 20.5GPa, respectively.
Methods of Maintenance Resources Configuration and Optimization for AMS Based on Effectiveness Evaluation
Authors: Jia Zhi Yu , Chen Qian Bao , Zeng Zhao Yang , Xu Zhe Han , Guo Xiao , Jin Xing
Published: February 2012

To improve effectiveness of the production and manufacturing equipment and reduce the downtime, methods of effectiveness evaluation and integrated configuration and optimization for spare parts and repair equipments are studied. It makes that advanced manufacturing system is target and .efficient work percentage is the measure of effectiveness. On the basis of AMS effectiveness concept, measure parameter is confirmed and influence factors are analyzed considering operation concept, design concept, maintenance concept and supply concept. And then, AMS effectiveness simulation evaluation models are proposed and simulation evaluation system is designed and developed. Optimization model for the support quantities of the spare parts and repair equipments is given with constraints on efficient work percentage, and solved using marginal analysis algorithm. Finally, an example is provided to verify the validity of the methods.
Synthesis of Biomorphic ZnO Using Radish Slices as Biotemplate
Authors: Li Hong Sheng , Liu Shan Shan , Shen Yi
Published: February 2012

The biomorphic ZnO were prepared with zinc nitrate using radish slices as the biotemplate. Microstructure, morphology and optical properties of the ZnO were studied using XRD, FTIR, FE-SEM and PL spectra. It is found that ZnO are wurtzite structure, the average diameter and length are 0.5μm and 2μm, respectively. There are a large number of small particles on the grain surface, the size of small particles is about100nm. The PL spectra of the biomorphic ZnO consists of two peaks centered at 394nm and 448nm, and the 394nm peak exhibits an obvious red shift compared with hexageonal cone-shaped ZnO.
Effect of Heartwood and Sapwood on Discriminant Analysis of Chinese Fir and Eucalyptus Wood by Near Infrared Spectroscopy
Authors: Yang Zhong , Lv Bin , Qiu Jian , Xie Xu Qin
Published: February 2012

The difference of heartwood and sapwood is one of the problems in discrinmant analysis of wood species. The effect of heartwood and sapwood on discrinmant analysis of wood species by near infrared spectroscopy was investigated in this paper. Three models in turn calibrated by sapwood samples, heartwood samples and mix samples of sapwood and heartwood of Chinese fir and eucalyptus were applied to discriminate wood species of unknown samples. The results showed sapwood and heartwood can influence the discriminant efficiency of wood species by near infrared spectroscopy coupled with PLS discriminant analysis but the influence was limited. In order to improve the accuracy, stability and reliability of the model, the model should be calibrated by samples which covered the characters of unknown samples.
Effect of VC/Cr3C2 Additions on Microstructure and Mechanical Properties of WC-16TiC-XTaC-10Co Ultrafine Cemented Carbides
Authors: Zhang Chong Cai , Wang Quan , Yuan Qun Qun , Wang Long
Published: February 2012

In this paper, the WC-16TiC-xTaC-10Co mixture mixed by WC 0.52μm, (W, Ti, Ta)C 2.9μm and Co1.36μm and prepared by high-energy ball milling, changed the VC and Cr3C2 adding amount. After ball milling for 60 hours, an average particle size of 220nm powder was prepared and it was cold isostatic pressed at 300MPa and vacuum sintered at 1410°C. The physical properties and the micrographs of samples were detected. The main conclusions are as follow: the coercivity and hardness increase and Cobalt magnetic decreases with the content of Cr3C2 increasing, the transverse rupture strength (TRS) does not vary. The VC and Cr3C2 inhibit the growth of WC grain, but can’t inhibite the (W, Ti, Ta)C grain growth effectively.
One-Pot Process for Preparation of Ferrocenylethene Derivatives via Solvent-Free Wittig Reaction
Authors: Jia Jian Hong , Dong Hua Qing , Li Yu Jin , Sheng Wei Jian , Gao Jian Rong
Published: February 2012

One-pot process for preparation ferrocenylethene derivatives by solvent-free Wittig Reaction of ferrocenecarboxaldehyde, alcohol, triphenylphosphonium bromide, and NaOH without the synthesis of phosphorus ylides was reported. The ferrocenylethene products obtained had an 80% yield with NaOH as the base at room temperature for 30 to 90 minutes.
Effect of Ultrasonic and Argon-Blowing Treatment on the Nitrogen Content in Low Carbon Steel
Authors: Li Jie , Ge Cheng Ling , Li Ling
Published: February 2012

The processing method for introducing an ultrasonic wave probe directly inserted into the molten steel was used. Effect of ultrasonic and argon-blowing on the nitrogen content in low carbon steel was carried out. The results showed that with the ultrasonic treatment separately, the nitrogen content in the molten steel reduced, but the removal rate was relatively lower with about 3.13~9.04 %. Using the argon-blowing agitation separately, the removal rate of nitrogen in the steel was relatively higher with about 6.89~32.68 %. With the increase of argon flow rate and prolong of the treatment time, the removal rate of nitrogen in the molten steel trended to increase at first, and then reduce.
Point Clouds Based Dynamical Representation for Heterogeneous Objects
Authors: Li Jing Bo , Yang Ji Quan , Shi Jian Ping
Published: February 2012

An approach of point clouds based dynamical representation for Heterogeneous Objects (HEO) is proposed to describe the HEO, in which materials distribution is uniformed or irregular. Mesh refined STL model and micro-tetrahedral cell are employed to rebuild HEO geometry. Meanwhile, distribution property, volume fraction and distribution vector are used to represent material features of HEO nodes within each material layer. Therefore, after implementing the above interrogation process layer by layer, HEO geometry and material composition representation can be defined. The approach is effective and practicable through some numerical examples demonstrated based on developed HEO fabrication system.
First-Principles Study of Energy Band Gap of Graphene-Like B-C-N by Strain
Authors: Xu Xin Miao , Lu Yu
Published: February 2012

We report a first-principles investigation on BN dopped monolayer graphene sheet and examined the electronic band structure and band gaps in equilibrium state and under strain. The obtained results reveal that the doping of B-N pairs on the hexagonal sheet can open the gap at the Dirac-like point. With heavy doping and more B-N bonds the energy bad gap is found to be larger. Upon tensile deformation, the dopped BCN monolayer sheet represents a strong anisotropic stress-strain relation. Detailed strain-gap relation investigation reveals that the energy band gap presents desperate variation trends for strain applied along and direction. Versatile band-gap modulation schemes can then be obtained through direction-dependent strain engineering of the BCN nanosheet..
Synthesis of Nanocrystalline Fe25Al57.5Ni17.5 by Mechanical Alloying
Authors: Cao Qi Zhi , Zhang Jing
Published: February 2012

Nanostructured Fe25Al57.5Ni17.5intermetallics was prepared directly by mechanical alloying (MA) in a high-energy planetary ball-mill. The phase transformations and structural changes occurring in the studied material during mechanical alloying were investigated by X-ray diffraction (XRD). Thermal behavior of the milled powders was examined by differential thermal analysis (DTA). Disordered Al(Fe,Ni) solid solution was formed at the early stage. After 50 h of milling, Al(Fe,Ni) solid solution transformed into Al3Ni2，AlFe3，AlFe0.23Ni0.77 phase. The power annealed at temperature 500 results in forming of intermetallics AlFe3 and FeNi3 after 5h milling. The nanocrystalline intermetallic compound was obtained after 500h milling.
Microwave Synthesis and Characterization of Nanoscale Lanthanum Cobaltite
Authors: Jiang Xiao Yu , Chen Jin , Chen Wen Zhe
Published: February 2012

Nanoscale lanthanum cobaltite with perovskite-type was successfully synthesized by microwave irradiation directly and was characterized by XRD, SEM, XPS and BET analysis. The results show that the size of particle was 18 nm averagely, the surface area to be 31.0 m2 g−1. The electrochemical properties were studied by cyclic voltammetry and steady state polarization. The cyclic voltammogram between 0 and 0.55 V exhibited two pairs of redox peaks prior to the onset of O2 evolution in 1 mol dm−3 KOH. The Tafel slope and the reaction order with respect to concentration of OH− were found to be 60 mV decade−1 and ca. 1, respectively.
Experimental Research of Energy Harvesting and Storage Based on Ferroelectric Materials
Authors: Li Kai Feng , Liu Rong , Wang Lin Xiang
Published: February 2012

The concept of energy harvesting works towards developing self-powered devices that do not require replaceable power supplies. Energy scavenging devices are designed to capture the ambient energy surrounding the electronics and convert it into usable electrical energy. A number of sources of harvestable ambient energy exist, including waste heat, vibration, electromagnetic waves, wind, flowing water, and solar energy. While each of these sources of energy can be effectively used to power remote sensors, the structural and biological communities have placed an emphasis on scavenging vibrational energy with ferroelectric materials. Ferroelectric materials have a crystalline structure that provide a unique ability to convert an applied electrical potential into a mechanical strain or vice versa. Based on the properties of the material, this paper investigates the technique of power harvesting and storage.
Synthesis and Liquefaction Properties of L-Alanine Hydrosulfate Ionic Liquid
Authors: Huang Jian Hua , Xie Hong Lu , Zheng Lin Lu , Wu Yan Lin , Zhu Wei Xuan
Published: February 2012

Ionic liquid containing L-alanine cations and hydrogen sulfate was synthesized using L-alanine and sulfuric acid as materials. Fourier Transform Infrared Specctrometer was used to verify the final product. The results showed that the objective product was developed successfully. General properties of the final product were detected. The results showed that strong acidity, large viscosity, soluble in polar solvents and insoluble in nonpolar solvents were the product’s properties which were suitable for liquefying. The liquefaction rate of ionic liquid on paper was studied. Study the optimum liquefaction condition using the method of orthogonal experiment design. By stirring at 80°C for 3 hours using ionic liquid with the concentration of 100%, liquefaction rate of ionic liquid on paper was high.
Multi-Functional Fabric Development and Study on its Performance
Authors: Liu Yan Jun , Feng Lan Qing , Liu Peng
Published: February 2012

Based on the theory of sweat transfer principle and knitted fabric structure , two kinds of multi-functional fabrics are developed with chitin fiber , cotton fiber and coolplus fiber in this paper. The wearablity , moisture-absorption and dry-fast property , air permeability and anti-bacterial property etc. are tested . The results show that the fabrics have many excellent properties , such as wearablity , moisture-absorption , dry-fast and anti-bacterial property etc. The fabrics can absorb moisture rapidly from one side of the fabric , then transfer it to the other side of the fabric and gave off , thus the fabrics can dry quickly . So the clothing made of these fabrics will keep our skin dry and comfortable, In summary , the fabrics developed are ideal fabrics for making high–quality leisure sportswear .
Study on Lock Mechanism of Coil Strapping Machine
Authors: Li Cheng Qun , Sun Chao
Published: February 2012

The thesis studies the lock body of coil binding machine. It suggests that a convertible drive lock body just need a cylinder drive to complete lock molding, pressure strip, lock, and cut off, so as to simplify the locking body structure. This paper uses the theory of mechanism to analyze the convertible drive lock body. This paper applies Creo Elements/Pro, the 3D model software, to build up lock body model and analyses its structure. This paper also analyses the key components in FEA and strength calculation, using Pro/Mechanica module.
The Higher Order Crack Tip Fields for Special FGM Functions
Authors: Dai Yao , Zhang Lei , Chong Xiao , Liu Jun Feng
Published: February 2012

Superposition principle and the higher order crack tip fields for power function are used to obtain the higher order crack tip fields for several special complex models. A new effective way is provided to solve the fracture problems of different structures and special non-homogeneous elastic materials, which establishes a theoretical basis for determing stress intensity factor, numerical simulation of higher order element and experimental analysis