bluuebunny/crossref_metadata_2025 huggingface dataset:
Preparation and Anti-Icing Property of a Porous Superhydrophobic Magnesium Oxide Coating with Low Sliding Angle
Authors: Wang Jian , Chen Hong
Published: July 2012

A porous superhydrophobic magnesium oxide coating with low sliding angle was prepared by a facile method. The water contact angle and sliding angle of the porous superhydrophobic magnesium oxide coating were 155±1.9º and 1.5º, respectively. The anti-icing property of the porous superhydrophobic magnesium oxide coating with low sliding angle was investigated in a climatic chamber with a working temperature of −6 °C. The results showed that the porous superhydrophobic magnesium oxide coating with low sliding angle can largely prevent ice formation on the surface, showing excellent anti-icing property. The porous superhydrophobic magnesium oxide coating with good anti-icing property will be perfectly desirable for outdoor equipments to reduce ice formation on their surfaces in cold seasons. This work will provide a new way to fabricate anti-icing coating and thus find applications in a variety of fields.
Structure and Properties of Sol-Gel Derived TiO2/SiO2 Films by Hot Water Treatment
Authors: Chu Yong , Hu Ai Ni , Gao Yuan , Liu Hui Tao
Published: July 2012

TiO2/SiO2composite films were prepared by treating the sol-gel derived films with hot water. Amorphous silica was used as a binder with the aim of producing Si-O-Ti bonds. This process was done at 90°C under atmospheric pressure, and thus anatase nanocrystals-dispersed films can be formed on various kinds of substrates including organic polymers with poor heat resistance. The formation of anatase nanocrystals was found to proceed to hydrolysis of Si-O-Ti bonds. The crystalline phase, structure, morphology and photocatalytic performance of the films have been investigated.
Preparation and Electrical Properties of Bi0.9Nd0.1Fe0.925Mn0.075O3 Thin Films
Authors: Yan Ning , Yang Sheng Hong , Zhang Yue Li
Published: July 2012

Pure BiFeO3(BFO) and Bi0.9Nd0.1Fe0.925Mn0.075O3(BNFM) thin films were deposited on Pt(111)/Ti/SiO2/Si substrate by sol-gel method. X-ray diffraction analysis showed that all the films were single perovskite structure and a phase transition appeared in Nd–Mn codoped BiFeO3 thin films. Electrical measurements indicated that the ferroelectric properties of BFO thin films were significantly improved by Nd and Mn codoping. BNFM films exhibit a low leakage current and a good P-E hysteresis loop. The remanent polarization (Pr) value of 74μC/cm2has been obtained in BNFM films, while the coercive field (Ec) is 184kV/cm.
Preparation and Photocatalytic Property of Nd-TiO2 Thin Films Prepared by Sol-Gel Dip Coating
Authors: Huang Feng Ping , Sun Jing Jing , Fan Ying Ge
Published: July 2012

Uniform and highly adherent thin films of TiO2and Nd-TiO2were deposited on high silica fiber by sol-gel dip coating method in this study. The surface morphology and properties of synthesized composites films were characterized by XRD, SEM, TEM and XPS. The photocatalytic reactivity studies of TiO2and Nd-TiO2films were evaluated by photodegradation of the methyl orange (MO) under ultraviolet irradiation. The results shown that neodymium doped TiO2films have higher photodegradation efficiency than that pure TiO2films. The photocatalyst on high silica fiber have a higher photocatalytic activity compare to the glass due to it is light-guide fiber.
Effect of Current Density on the Composition and Mechanical Properties of Cr1-xAlxN Coating by Ion Arc Plating
Authors: Wang Cheng Xi , Peng Ji Hua , Liang Xian Wen , Tian Jun
Published: July 2012

The Cr1-xAlxN coatings were deposited onto M2 tool steel using ion arc plating technique. The effect of current density on the surface morphology and mechanical properties of TiN/CrAlN coating was made. It was found that adjusting the pure metal target currents is not only to change the metal atomic ratio, but also to influence the surface morphology, their hardness and adhesion. The micro hardness Hv increases almost linearly with Al content of the coating in this study, and the Cr0.41Al0.59N coating reaches Hv 2950. The adhesion force between the coating and the substrate reaches maximum value 55N, when the [Al]/[Al+Cr] ratio is 0.44.
Formation and Infrared Emissivity of Microarc Oxidation Coatings on Mg-7Li Alloy
Authors: Li Jun Gang , Lv Ying , Wang Hong Wei , Zhu Zhao Jun , Wei Zun Jie , Meng Xiang Cai
Published: July 2012

Ceramic coatings were successfully fabricated on Mg-7Li alloy in Na2SiO3 electrolyte by microarc oxidation (MAO). The phase composition, formation mechanism and infrared emissivity of the coatings were investigated. Results show that the surface of MAO coating exists some micropores with a diameter of 2-6μm due to electric breakdown. The MAO coating with 13μm thickness is mainly composed of MgO, Li2O2 and Mg2SiO4. The infrared emissivity of the MAO coating is higher than that of bare Mg-7Li alloy, mainly because the coating consisting of ionic crystals has lower lattice vibration symmetry and larger dipole moment.
Study on Heat Insulation Properties of Zinc Oxide Coated Hollow Glass Beads
Authors: Zhong Ming Feng , Ye Feng , Su Da Gen
Published: July 2012

Zinc oxide coated hollow glass beads were prepared by Chemical package method with ZnSO4٠7H2O,NH4HCO3 and hollow glass beads as raw materials, and they were characterized with UV/VIS spectrophotometer,SEM, and the heat insulation properties was detected by the homemade device. The experiment results shown that the near-infrared reflectivity of zinc oxide coated hollow glass beads was 45.1% better than the 12.5% of hollow glass beads, and it has good heat insulation properties.
Characterization of AB5-Type Metal Hydride Modified by Electroless Plating Nickel
Authors: Wu Wu Tsan , Do Jing Shan
Published: July 2012

The charge/discharge properties of commercial metal hydride alloy powder (MmNi3.81Mn0.41Al0.19Co0.76) is improved and modified by electroless plating nickel. The effect of concentration of reducing agent (Cr), concentration of complex agent (Cc), reaction temperature (T), reaction time (t), and the amounts of MH powder per volume (CMH) on the utilization of the modified MH alloy used as the negative electrode of Ni/MH battery is systematically studied. The utilization of modified MH alloy is mainly affected by Cr, Cc and t. The utilizations of MH alloys modified with condtions of T = 70 oC, t = 90 min, Cr = 20 g l-1, Cc = 20 g l-1 and CMH = 20 g l-1, respectively, are obtained to be 92.3, 64.7 and 23.6% at discharging rate of 1, 4, and 10 C. The utilizations of modified MH alloy are increased by 15.5, 45.6 and 19.8% compared with the pristine MH alloy for discharging rates of 1, 4 and 10 C, respectively.
Coating Humic Acid on Vermiculite Surface for the Adsorption of Nickel(II)
Authors: Deng Xu Hong , Wei Shi Yong
Published: July 2012

Surface properties and Ni(II) adsorption characteristics of HA-vermiculite were investigated and compared with those of vermiculite. The cation exchange capacity (CEC), pH at zero point of charge (pHZPC), and surface charge at pH 6.5 and surface fractal dimension of HA-vermiculite were 44.69 cmol/kg, pH 2.57, -0.418 mmol/g, and 2.45, respectively. Compared to vermiculite, the CEC, surface negative charge and surface fractal dimension of HA-vermiculite increased, and the pHZPC of HA-vermiculite decreased. The adsorption data for Ni(II) by HA-vermiculite could be fitted by Langmuir isotherm (R2 =0.982) and also by Freundlich isotherm (R2 =0.987). At pH 6.5, the Langmuir maximum adsorption capacities for Ni(II) of vermiculite and HA-vermiculite were 11.86 and 19.41 mg/g, respectively.
Processing and Mechanical Properties of Starch and PVA Composite Reinforced by Nano-SiO2
Authors: Liu Wen Yong , Chen Yi , Tu Xi , Liu Yue Jun , Hao Xi Hai
Published: July 2012

The thermoplastic processing and mechanical properties of starch and polyvinyl alcohol (PVA) composites were studied. Glycerol was chosen as the plasticizer and nano-silica (nano-SiO2) as the reinforcing agent of the starch/PVA composites. The results showed that the mechanical properties of the obtained starch/PVA blend were best when the glycerol content was 30% of starch and 20% of PVA, and the weight ratio of PVA and starch was 0.8 (wPVA/ wstarch= 0.8/1). After the addition of nano-SiO2, the mechanical properties of the starch/PVA blends were improved. When the weight percent of nano-SiO2was 2%, the mechanical properties of the SiO2/starch/PVA composite were most excellent. It was shown that the tensile strength was increased by 16% and the elongation increased by 72%. Moreover, it was confirmed by rheological measurements that nano-SiO2could interact with the composite materials, which results in the improvement of the mechanical strength of the starch/PVA composites.
Mathematical Model for the Tree Leaf Shape and Estimation of Leaf Mass
Authors: Liu Yang , Liu Zhao , Zhang Yu , Duan Qian Yao
Published: July 2012

The relationship between leaf shape and tree profile is discussed in this paper at first. Through analysis of Leonardo’s rule, Fibonacci sequence and growth regulation, we conclude that leaf shape is related to sunlight, tree profile, and the distribution of leaves. Then by constructing an integral equation of the leaf-mass density, a mathematical model is established to estimate leaf mass of a tree when the density nearly obeys gamma distribution. At last, some numerical experiments are presented to confirm the proposed model.
H∞ Filtering for Nonlinear Systems with Time Delays via Takagi-Sugeno Fuzzy Model
Authors: Ren Jun Sheng , Zhang Xian Ku
Published: July 2012

State estimation is an important topic in controller design. H∞filtering problem is discussed for fuzzy dynamical systems with time delays by using Takagi-Sugeno (T-S) model. Fuzzy H∞filter is obtained such that the filtering error system is stable and guarantees a prescribed estimation error level. Delay-dependent Lyapunov functional approach is employed to lower the conservativeness of the filter design. Therefore, the results of fuzzy H∞filter are delay-dependent. An example is given to illustrate the proposed results.
Multi-Attribute Decision Making Method Based on Intuitionistic Fuzzy Grey Sets
Authors: Gui Mei , Ding Xiaoyang , Zhang Cheng Yi
Published: July 2012

In this paper, it discussed the fuzzy multi-attribute decision making problems that are the attribute weights are known and the attribute values are intuitionistic fuzzy grey sets. Intuitionistic fuzzy grey set is given, and the positive and negative ideal points are introduced, then the definition of Hamming distance formula between the intuitionistic fuzzy grey numbers is discussed. Moreover, it puts forward multi-attribute decision making method based on intuitionistic fuzzy grey set, and discusses the steps of the method. Then, the examples are given to show that the method is reasonable and effective.
Multi-Channel Fiber Optical Sensing System for Urban Bridge Cluster Health Monitoring
Authors: Li Yi , Guo Zhong , Xiang Yi Qiang
Published: July 2012

Modern technologies are increasingly facilitating real-time monitoring of urban bridges and transportation networks. The advances in multi-channel fiber optical sensing system for instance, enable practical deployments for large extended bridge structural systems. Sensor data, can be used for long-term condition assessment, traffic-load regulation, emergency response, and seismic safety applications. In this paper, A flexible and scalable urban bridge Cluster Health Monitoring system is being developed and implemented. A typical concrete tied arch bridge was selected to introduce the computer-based automated signal analysis algorithms to process the monitoring data and one-year measurement data obtained from the fiber optical strain and temperature sensors are used for this study. The correlation analysis technique is applied to quantify the effect of temperature on the strain responses. The results show that the linear regression model exhibits good capabilities for mapping the strain responses with temperature.
Oscillation of Dynamic Equation on Time Scales
Authors: Yan Xin Zhou
Published: July 2012

In this paper,we consider the oscillation of second order linear dynamic equation on time scales, and obtain sufficient condition for oscillation of solutions.
A New Isometric Integral Operator on Bloch Space in the Disk
Authors: Li Geng Lei
Published: July 2012

In this paper, we defined a new integral operator and studied the isometric properties on the Bloch space in the disk. we gave a necessary and sufficient condition about it.
Finite Element Analysis to a Kind of Elliptic Variational Inequality
Authors: Zhu Jun Hui , Cheng Chun Rui , Lou Guang Pu
Published: July 2012

Finite element methods for the elliptic variational inequality of the second kind deduced from friction problems or nonlinear materials in elasticity have been discussed. In this paper, the finite element method with numerical integration for the second type elliptic variational inequality is considered and an error estimate is proved.
A New Spherical Triangle Graphic Method
Authors: Dong Pei Bei , Li Shuo
Published: July 2012

This Paper expounds the relation between spherical triangle and triangular pyramid in a new perspective. Thus, the graphic method to address spherical triangle problems by descriptive geometry is put forward, which broadens the research field of spherical triangle problems.
The Force Analysis of the Slide Way in Building Large Structure Based on the Girder Structure
Authors: Li Shu Min
Published: July 2012

Slide way is the base in building the large structure. Use float and drag method to install the large structure influenced by the hoisting equipment ability. To control the height of the large structure, need to add a girder structure at the bottom of the large structure after building it to make the structure hoist it to a few or dozens of meters to ship. To make force analysis and grasp the fulcrum stress of the large structure and the intensity of the girder structure and the slide way stress to make the system safe and provide technical support for the carrying out of the engineering.
Study on Microstructure and Impact Toughness of In Situ Mg2Si Particle Reinforced Al-Si Matrix Composites
Authors: Liu Niu Can , Kang Guang Sheng , Liu Zhong Xia
Published: July 2012

The microstructure and impact toughness of in-situ Mg2Si/Al-Si composites were studied in the different content of Sb. The results show that Sb can improve the microstructure and impact toughness of Mg2Si/Al-Si composites. When the content of Sb is 0.4%, the morphology of primary Mg2Si changes from dendrites to fine particles, the average size of Mg2Si particles is refined from 52μm to 25μm, and the impact toughness of the composites increases from 6.3572J/cm2 to 11.4394J/cm2. The improvement of impact toughness can be attributed to the fine-grain strengthening. However, excessive Sb is disadvantageous to the modification of the composites.
Numerical and Experimental Fractal Pore Network Study on Drying of Porous Media: Numerical Simulation
Authors: Yuan Yue Jin , Yuan Yue Ding , Xu Ying Ying , Dong Ji Xian , Liu Xiang Dong
Published: July 2012

In order to validate the model established in reference [1], a drying experimental study was conducted, and numerical simulation was carried out under the same environmental condition. The experiment and simulation results indicated that the fractal pore network model could explain the drying process of real porous media effectively, the drying curve of fractal models was more consistent with the real drying curve than that of regular models, and its moisture fields well reflected the drying kinetics characteristic of real porous media. There was no correlation between the pore fractal dimension and the drying time, and the simulation result of unsteady-state heat transfer was more consistent with a real drying process than that of steady-state heat transfer for the convective thermal drying.
The Design of Addendum Surfaces for Automotive Back Light Holders Based on the Software Dynaform
Authors: Zhang Yu Ping , Wei Guang Zhen , Ran Hua An
Published: July 2012

This article analyzes characters of automotive back light holders. It simulates the deep drawn forming process to optimize blanks by the software Dynaform which is used for analyzing plat materials’ in three dimensions- formation. It analyzes the formed result, comparing with the graph FLD and then modifies the local surfaces, which achieves the aim of optimizing process formed surface. Then we get the reasonable deep drawn surface of the die. Finally, the eligible products are produced.
Study on the Probability Finite Element Format of Hyper-Static Shaft
Authors: Zhang Guo Zhi
Published: July 2012

When hyper-static shaft was turned, its deformation mechanism was studied. Its finite element format was established when it was supported by the top. Considering the randomness of cutting force, elastic modulus, its length and its diameter, its probability finite element format was established. Moreover, its probability sample finite element model was established, and the effect of cutting force, elastic modulus, its length and its diameter to its maximum deflection was obtained. The study provides the method and theoretical basis for the analysis of the hyper-static.
Prediction of Side Compression/Side Tension Elastic Modulus on Lattice Structure Sandwich Core Materials
Authors: Li Qing Fei , Tian Ye , Zhang Dong Xing , Li Di Hong , Xiao Hai Ying , Jia Jin
Published: July 2012

In this paper, elastic modulus of core cell in x direction was built. Equivalent tensile/compressive modulus of core materials in y direction and equivalent Poisson ratio of core materials in yox plane were also built.
Direct Reactive Compatibilization of GMA and Comonomer on PP/Wood-Flour Composites
Authors: Li Yue Wen , Zhang Jia Min , Chen Xin Hua
Published: July 2012

Compatibilization between polypropylene(PP) and wood-flour was achieved by means of direct reactive extrusion of glycidyl methacrylate(GMA), PP, wood-flour, and other additives. Impact cracking surfaces of the PP/wood-flour composites(WPCs) was observed via scanning electron microscope(SEM), and mechanical properties of the WPCs were tested. The effect of comonomer styrene(St) and antioxygen triphenyl phosphite(TPP) on the reactive compatibilization was also evaluated. Experimental results indicated that the anchoring strength of interface in the composites was obviously strengthened after direct reactive extrusion. The tensile and flexural strength of the WPCs were obviously improved, but the elongation at break and notched impact strength slightly declined after reactive compatibilization by GMA and dicumyl peroxide(DCP). The addition of St and TPP improved the mechanical properties of the WPCs. At 1.5% of GMA, 0.3% of DCP, 1.5% of St and 1% of TPP in the extrusion composition of WPC, the tensile strength, flexural strength, elongation at break and notched impact strength respectively increased by 39%, 31%, 28% and 29% comparing to those of the WPC without reactive extrusion.
Scheduling Flexible Production Lines with No Intermediate Buffers by Hybrid Algorithms
Authors: Wang Bing Gang
Published: July 2012

This paper is concerned about the scheduling problems in flexible production lines with no intermediate buffers. The optimization objective is to minimizing the makespan. The mathematical models are presented. Since the problem is NP-hard, a hybrid algorithm, based on genetic algorithm and tabu search, is put forward for solving the models. In this algorithm, the method of generating the initial population is proposed and the crossover and mutation operators, tabu list, and aspiration rule are newly designed. The performance of the hybrid algorithm is compared with that of the traditional genetic algorithm. The computational results show that satisfactory solutions can be obtained by the hybrid algorithm and it performs better than the genetic algorithm in terms of solution quality.
Study on a Novel Soften Curing Agent for Toughening Epoxy Resins
Authors: Lou Chun Hua , Wang Jian Xin , Ma Li Qun , Chen Zhao Hui
Published: July 2012

A new soften curing agent for toughening epoxy resins was synthesized by m-phenylene diamine modified with epoxypropyl butyl ether. Fourier transform infrared (FT-IR) analysis showed that the longer the reaction time was, the smaller the absorption peaks of epoxy group were. The results of the mechanical properties demonstrated that the impact property of the epoxy resin cured by modified m-phenylene diamine at the moderate temperature was better than that of cured by un-modified one because of the introduction of soft ether chain.
Simulation of Cumene Synthesis by Suspension Catalytic Distillation
Authors: Wang Er Qiang , Li Cheng Yue , Wen Lang You , Du Ze Xue , Zhang Yong Qiang
Published: July 2012

This paper deals with alkylation of benzene with propylene to produce cumene by Suspension Catalytic Distillation (SCD) which, as a new technology of process intensification, has been developed from traditional catalytic distillation. In this SCD process, the supported heteropolyacid catalysts are suspended inside the liquid phase on the column tray and flow with them, while in traditional catalytic distillation the catalyst pellets are generally fixed somewhere inside the column. SCD processes have been investigated for alkylation reaction of benzene with olefins in laboratorial scale. A pilot plant of SCD process for cumene synthesis had been run for several months. It has shown more advantageous characteristics for cumene synthesis compared with conventional process consisting of a reactor followed by distillation train. Based on experimental data and the reactive kinetic parameters of cumene synthesis using the supported heteropolyacid catalysts, numerical simulation of SCD process of the pilot plant was performed by an equilibrium stage model to study the effects of operation conditions on the process performance. The simulation results could agree, to a great extent, with the data acquired from the pilot plant experiment.
A Two-Dimensional CFD Simulation for Different Spacers of Spiral Wound Moudles
Authors: Xu Song Lin , Mi Wen Qiang
Published: July 2012

A computational fluid dynamics (CFD) model was used to simulate unsteady fluid flow in a two-dimensional channel. The flow was computed for several different geometries and velocity. Calculations show different flow patterns of the cavity spacer, the submerged spacer and the zigzag spacer. Applications of two-dimensional CFD simulation give a visual method to determine the advantages of each spacer type.
Numerical Simulation of Inner-Outer Couple Cooling Slab Continuous Casting in the Filling Process
Authors: Jin Yan Juan , Cui Xiao Chao , Chen Yan Xia
Published: July 2012

In the paper, flow status and solidification status of molten steel in inner-outer couple cooling mold in the filling process are simulated by using fluid dynamics software Flow-3d, and obtain distributing diagrams of flow field and temperature field and free-surface shape diagrams in the filling process. Influences of flow field and temperature field of filling process on solidification are analyzed in the slab continuous casting. It is indicated that inner cooler can improve molten steel flow status, which is favorable to inclusion in molten steel floating up, quicken the solidification rate of molten steel in the mold.
Pelletization Quality Simulation for Operation Uncertainty of Die-Plate Based on Liquid-Solid-Liquid Coupling Model
Authors: Liu Xiao Feng , Liu Fu Qiao , Yu Bao Hai , Bi Chao , Zhang Bing
Published: July 2012

As an important component of large-scale extruder system for polymer material, Die-plate can be regarded as the final determinant for pelletization quality. Flow fluctuation of extruder and die-hole blocking can be summarized as two uncertainties for pelletization quality problem. A Liquid-Solid-Liquid coupling FEM method is presented to simulate factors of temperature distribution, flow distribution and flow rate control. Based on the calculations and mechanism analysis, pelletization quality degree and assessment framework are designed and calculated to analyze the impact of operation uncertainties to final product. With the simulation and evaluation framework, control methods for pelletization quality are discussed for Die-plate design and operation condition settings.
The Microstructure and Nanocrystallization Behavior of Cu-Zr-Ti-Al Bulk Metallic Glass Matrix Composites
Authors: Zhou Guo Rong , Hur Bo Young , Teng Xin Ying , Yue Xue Zheng
Published: July 2012

The effect of the gradual substitution of Ti by Al on glass forming ability and structure in the Cu52Zr40Ti8-xAlx(x=0, 2, 4, 6, 8) alloys was studied by using XRD, DSC and SEM. Furthermor, the nanocrystallization behavior of the amorphous alloys also was studied by annealing method. The result indicates that the glass-forming ability and thermal stability is decreased with the increasing of the content of Al. On the other hand, the nano crystals with diameter of 50 - 100 nm were all observed when the five amorphous samples were annealed at 650 K for 1h.
Spring-Damping Model of Moving Boundary in SPH
Authors: Zhang Zhi Neng , Jin Wen Jia , Jiang Shun Liang , Xu Shao Ping
Published: July 2012

Traditional boundary force method of SPH applies Lennard-Jones equation to compute the virtual repulsive force by calculation of molecular force. But this method is strongly non-linear and easily leads to not convergence in calculation. In this paper, spring-damping boundary force model is utilized to solve the problem of moving boundary. Using spring-damping boundary force model, rotary moving boundary of screw channel-driven has been simulated and the result is well consistent with the simulation of Fluent. Comparing with traditional boundary force equation, this model is long-term stable and its effectiveness has been validated by case study.
The Study of Fracturing Crack Propagation Regulation Based on Information Entropy Theory
Authors: Zhao Wan Chun , Ou Yang Yong , Sun Chen Yan , Yuan Wei Wei , Jiang Tian Hong
Published: July 2012

In this paper, we introduce the entropy theory and energy theory into the research of analyzing the crack open and propagation. Regulation, analyzing the factors that affect fractured crack propagation, and establishing the method of researching fractured crack propagation using entropy theory. Transforming the stress factor that affect crack propagation into entropy value, and on that basis we established the entropy variation equation for calculating the crack open, and obtained the new criterion and model for calculating fracturing crack open. Obtaining a new method for describing crack propagation regulation from the entropy aspect. Revealing the nature of crack open, propagation and close from microscope.
Thermal-Mechanical Simulation of the Controlled Rolling and Cooling Process by Orthogonal Design for Pipeline Steel
Authors: Jiang Min , Chen Li Na , Pang Wei , Li Chong He , Lu Xiong Gang
Published: July 2012

A novel pipeline steel was prepared by the vacuum inducting technology, using Gleeble-3500 hot simulator, its parameters of thermo-mechanical control process (TMCP), such as heating temperature, finish rolling temperature, finish cooling temperature and cooling rate, have been studied by the orthogonal experiment with four factors and three levels. Through the orthogonal theoretical analysis, it is found that the sequence of the effect of parameters on the mechanical property is: Cooling rate > Heating temperature > Finish cooling temperature > Finish rolling temperature, the cooling rate is the most important factor affecting the inspection target and possesses a great influence on the hardness of the pipeline steel.
Nonlinear Stain of Variable Cross-Section Beam Element Based on Positional FEM
Authors: Ma Lv Zhou , Liu Jian , Diao Xun Lin , Jia Xiao Dong
Published: July 2012

Based on positional finite element method, this paper attempts to find beam elements that can show the characteristics of the variable cross-section beam and can be practically applied. In this paper, the stain on a random point of the variable cross-section beam element is obtained when beam depth changes in a linear or quadratic parabolic way and beam width is fixed. The calculation is different and simpler than the classical nonlinear FEM.
Numerical Simulation on the Effective Thermal Conductivity of Porous Material
Authors: Liu Shan Qi , Li Yong Bing , Liu Xu Yao , Zhu Bo Jing , Tian Hui Quan , Shi Yao Lin
Published: July 2012

The thermal conductivity of porous material is an important basic parameter, but it is not easy to study, due to the complexity of the structure of porous material. In the present work, we show a numerical simulation method to study the thermal conductivity of the porous material. We generate 200 material models with random distribution of solid skeleton and air for a fixed porosity, then we get the effective thermal conductivity of the porous material by Monte Carlo statistical analysis. The results are in good agreement with the previous empirical formula. The numerical results show that the effective thermal conductivity of porous material depends on the thermophysical properties of solid skeleton and air, the pore distribution and pore structure, the numerical error decreases with the increase in the number of grids, this finite element method can be used to estimate the effective thermal conductivity of composites and maybe has broad application prospects in terms of computing the effective thermal conductivity and other physical properties of composite material with known components.
Synthesis of VN-Reinforced Iron-Based Composite
Authors: Zhang Shi Ping
Published: July 2012

Vanadium nitride (VN) particulate reinforced Fe-based composite was produced with ferrovanadium, Ferromolybdenum, ferrochromium and nitrogen gas by in situ synthesis process. The microstructure of the composites was characterized by X-ray diffraction and scanning electron microscopy. With the help of differential thermal analysis, reaction process of Fe-V-N system was discussed. The results show that the composite consists of VN and α-Fe phase. VN particles exhibit fine size and homogeneous distribution in Fe matrix. Formation of VN at 674°C is due to the reaction between ferrovanadium and nitrogen gas.
Simulation of Fatigue Life Prediction and Enhancement of Connecting Rod of Car Engine
Authors: Kurdi Ojo , Norman Mohd Arif Bin Mat , Yulianti Ian , Rashid Muhammad Nizam Bin Md
Published: July 2012

This paper investigates the fatigue life prediction and fatigue life enhancement of connecting rods of car engine. The fatigue life prediction was simulated by analyzing the stress occur in the connecting rod and then simulate the fatigue life prediction. The stress analysis was done by using finite element method. The results obtained from stress analysis is used as the input to simulate the fatigue life using stress-life method. The simulation was done for two models, the existing model and modified model. The modified model is the existing model with increased thickness in the highest stress region. The results show that the modified model has an improved fatigue life up to 231% compared to that of the existing model.
Effect of Heating Parameters on the Part’s Properties in Hot Stamping Process
Authors: Ge Rui , Long An , Chen Yin
Published: July 2012

In the automotive industry, the hot forming of high strength steels offers the possibility to obtain significant reduction of weight without affecting the structural performances of final products. Compared with conventional sheet metal forming, the proper design of hot stamping process chain requires the deep knowledge of both interface phenomena and material behavior at high temperatures in order to obtain the desired properties of final products in terms of microstructure and strength characteristics. The work presented in this paper aims at accurately evaluate the effect of heating parameters on the properties of final sheet components produced in hot forming operations. Different from that in the lab, all the samples and parts used for the experimental test were produced in the production line, which can objectively show the manufacturing properties and microstructure character of products in mass. Microstructure evaluation, hardness measurement and dimensional accuracy test after hot stamping were performed and considered. The best heating parameters for the researched hot stamping B-Pillar’s production were obtained through the above research.
A Brief Talk on Material Application in Green Packaging Design
Authors: Duan Hong Jiao , Zhang Li
Published: July 2012

In recent years, along with spiritual civilization and material civilization as well as the diversified development of design methods, people are urged to have higher demands on aesthetic standard, consumption concept, values and so on. Packaging design has therewith become protean, already broken through from simply protecting goods in the early days, into an extrinsic form of commodity competition. Material is the substantial carrier of packaging. No matter how novel the design originality is and how beautiful the design graph is, it must be realized relying on material. However, many companies or designers overemphasize on luxurious packaging. Not only do the raw materials cost high, they are also hard to recycle, which would eventually bring about influence to our living environment. Therefore, the application of green packaging material is of great urgency.
A Design Research of Household Steam Massage Deceit that Based on KANSEI Engineering
Authors: Zhu Xiao Ming , Yang Zheng
Published: July 2012

Household physiotherapy massage instrument is a household health care product that based on steam massage treatment efficacy. This product adopts secondary circulating lacquer technology, with large and stable steam, to implement effective steam waves on each sick parts of human body and make the drugs penetrate into the nidus promptly. The circular massage ball of it offering 360-degree snug massage could accelerate the drug penetration and achieve the purpose of health-care rehabilitation and prevention of disease. Based on KANSEI Engineering, this paper quantitatively analyzes the product and uses AHP to optimize design decision during the process of product design. Meanwhile, combined with steam therapy massage function, it give a more comprehensive analysis in terms of material, structure, color and interface operating mode. The research methods and results are of high reference value in developing and popularizing professional medical instrument in family use.
Research on the Panel Fabrication for the Field Emission Display with Double Strip Emitters
Authors: Wang Feng Ge , Li Yu Kui
Published: July 2012

With high effective screen-printing process, the field emission display panel with double stripe emitters was fabricated and their good field emission property was also characterized. Using sintered silver slurry with better electric conduction property as material, the cathode electrode including two parts was formed. The top cathode electrode was made up of two silver stripes, which the carbon nanotube material would reside on its surface. The bottom cathode electrode was separated by the cathode separate layer with the top cathode electrode, but the electric-connection would be performed between them through the preformed round holes. Using carbon nanotube as cathode, the field emission display panel with double stripe emitters was demonstrated.
Visual Elements and its Transmission of Clothes Shell Fabric Innovative Design
Authors: Wang Jiao Qing
Published: July 2012

This article firstly talks about the clothes shell fabric innovative design and briefly discusses the visual elements of the fabric. And then this article makes discussions on the texture elements of the fabric, the color elements, the material elements and its transmissions, with an emphasized analysis on the emotion and information transmission of color elements. Finally, I have reached a conclusion that visual elements are important part in the process of fabric innovative design.
Study on the Electrical Arc Ablation Performance of Al2O3 Reinforced Cu-Matrix Composites
Authors: Li Bin , Liu Gui Min , Du Jian Hua , Zheng Xiao Hui , Yong Qing Song
Published: July 2012

The Al2O3 particle reinforced Cu-based composites (Al2O3/Cu) were prepared by internal oxidation technology. The electrical arc ablation performance of Al2O3/Cu composite was compared with copper H62 through a series of ablation experiments. The results indicate that both the quality lost and ablation diameter of copper H62 samples are larger than those of Al2O3/Cu composites in condition of the same ablating current. The large ablation pits observed by scanning electron microscopy (SEM) indicated that the arc ablation of copper H62 is concentrate and serious. The result of energy dispersive spectrometer (EDS) shows that the molten copper alloy of H62 has been transferred and sprayed. However, the arc ablation pits of Al2O3/Cu composites are dispersing and slight. The transferring and spaying material of Al2O3/Cu composite is mainly from Cu-matrix. The anchoring effect and protection function of the uniformly dispersing Al2O3 grains, which are executed onto the Cu-matrix, has been considered to contribute to the excellent arc ablation performance of composite Al2O3/Cu.
The Effects of Micro-Hardness of Cu Based Friction Materials to Wear Rates and the Wear Rates Ratio of the Pair and the Friction Materials
Authors: Chen Bai Ming , Yu Hua Li , An Liang , Zhang Zheng Yu , Wang Ming Xu
Published: July 2012

The four kinds of Cu based friction materials with different micro-hardness were fabricated by sintering method, the Ti content of four kinds of Cu based friction material is 8%, 12%, 16% and 20%, respectively. The tribological properties were carried out on ring-to-block tester. The results show that the wear rates and the wear rates ratio of the pair and the friction material with lower micro-hardness were lower than that of friction material with higher micro-hardness, and lower wear rates ratio of pair and friction materials (WRRPF) is very helpful for protecting pair of friction materials.
Study on Mechanical Property of Conch Powder Reinforced Polyethylene Composite
Authors: Guo Zhi Hong , Shi Jia Wei , Shao Qun , Lin Pei Jie , Wang Yan Ping , Qiu Gao , Wang Yi Min
Published: July 2012

The impact performance of PE can be greatly enhanced by the use of functionalized conch powder, while maintaining high tensile strength thus giving this study high potentiality for its practical applications. The conch powder was treated by titanate coupling agent NDZ-201 before use and the influence of different proportions of conch powder on the mechanical properties of PE/conch powder composite is discussed in this article. The impact strength has a maximum value of 63.4kJ/m2 and the frictional loss records a minimum of 4.27×10-1mm3/(Nm)-1 and 42.2% lower than that of pure PE.
Different Additives to Inhibit Magnesia (MgO) Hydration
Authors: Zhang Wen Zheng , Liu Zheng , Mao Ping Li
Published: July 2012

Magnesia (MgO) is a fundamental component of many minerals found in nature and is used widely in our life, especially in refractory industry. However, the antihydration of MgO is a key concern in refractory suspension processing, MgO additions only in form of coarse particles(≥ 50 μm) or its contents of up to 10 wt.% are as a result of their high possibility to take place hydration reaction in water and the reaction can lead to volumetric expansion obviously. In the present work, citric acid (CA) can complex with Mg2+ in the MgO suspension under the condition of 4h and 25°C, and the deposit of magnesium ion-CA complexes become protective coating to inhibit magnesia react with water to form Mg(OH)2.The test results of RSV of different additives shows CA is the best antihydration compound to inhibit MgO hydration comparing with EDTA-2Na，sodium pyrophosphate(SP)，trimeric sodium phosphate(TSP), which RSV is only 5.3ml when its dosage is 0.3%wt.
Preliminary Study of Polypropylene/Sawdust Green Composite
Authors: Lou Ching Wen , Lin Ching Wen , Huang Chen Hung , Li Ting Ting , Chen Jin Mao , Lin Jia Horng
Published: July 2012

In this study, sawdust and polypropylene (PP) are melt-blended and injection-molded to form the wood-plastic composite (WPC).The WPC is then tested in terms of mechanical properties and compared with control groups of pure PP plate and PP/glass fiber (PP/GF) composite. In the tensile test, the WPC displays a tensile strength of 25-27 MPa, regardless of whether the sawdust content is 5, 10, or 15 wt%. Pure PP composite has a tensile strength of 30 MPa; PP/GF composite with 15 wt% glass fibers has a tensile strength of 57 MPa. In the bending test, the WPC displays a flexural strength of 44-45 MPa as the sawdust content does not influence the bending strength. PP/glass fiber composite yields a bending strength of 85 MPa when the content of glass fiber is 15 wt%. WPC is 5% lighter than PP/glass fiber composite.
Anti-Penetration Performance of Ceramic Composite Armor Analysis Based on the Unified Strength Theory
Authors: Li Bao Feng , Zheng Jian , Ni Xin Hua , Qu Yan Mei , Li Xiao Wen , Zhao Shu Zeng
Published: July 2012

The resistance pressure was the key to solve these problems that long rod projectiles penetrated ceramic targets at high velocity. Based on the twin shear united strength theory and the A-T model, the penetration depth were calculated. But the calculation result didn’t agree with experiment data. So the tension-compression ratio was redefined to apply to the dynamics problems according to the experiment data. And satisfied results were obtained.
Preparation and Infrared Emissivity Study of Optically Active Polyurethane/Multiwalled Carbon Nanotubes Nanocomposites
Authors: Chen Jing , Liu Bing Xin , Chen Xiu Bi , Xue Li Xin , Zhou Yu Ming
Published: July 2012

This paper described the preparation of optically active polyurethanes (BPUs)/multiwalled carbon nanotubes (MWCNTs) composites through the high-intensity ultrasound. SEM and TEM observations showed the homogeneous coating of MWCNTs by BPU. The infrared emissivity (8-14μm) study revealed that the composites possessed much lower infrared values compared with those of the polyurethanes and nanotubes, due to the special interface effect. The lowest infrared emissivity values of nanocomposites were S-BPU/MWCNTs εmin=0.461 and R-BPU/MWCNTs εmin=0.418, respectively.
A Study on the Behavior Characteristics of Curved FRP-Concrete Composite Panel
Authors: Jung Woo Tai , Park Jong Sup , Kim Seung Han
Published: July 2012

Following the recent growing interest on long-lasting structures, various researches attempt to exploit Fiber Reinforced Polymer (FRP) to constructions owing to the remarkable reduction of maintenance costs brought by its outstanding resistance to corrosion. However, research dedicated to curved FRP construction material applicable to tunnel or arch bridge is still absent. This study conducts loading tests and finite element analysis in order to examine the behavior of curved FRP-concrete panel produced by pultrusion. The test results reveal that FRP and concrete exhibit linear elastic behavior until the maximum load. The parametric analysis with various FRP sections shows that the behavior of the curved FRP-concrete composite panel depends on the web height of FRP, the spacing of the webs, the length of the flange and the radius of curvature.
Study on the Process for Fabricating Fly-Ash Floating Beads Particle Reinforced Aluminum Foam Matrix Composite
Authors: Luo Hong Feng , Fu Xin , Chen Zhi Shui , Guo Zhi Zhong , Liang Dong
Published: July 2012

Fly-ash floating beads particle reinforced Al foam matrix composite was fabricated by stirring casting method. Orthogonal test method shows that main influence factors on the fabrication of Al foam matrix composite from big to small in proper order is foaming time, foaming temperature, and amount of foaming agent. The optimum preparation process condition is as following: the foaming temperature is 800°C, the amount of foaming agent is 3%, and the foaming time is 12 min.
Effect of LaPO4 Partile Size on the Thermal Shock Resistance of ZrO2 Ceramics
Authors: Li Zhong Qiu , Ci Li Jie , Wang Hui , Li Yuan Liang
Published: July 2012

The thermal shock resistance of ZrO2/LaPO4composites containing LaPO4 with different particle size was investigated. Microstructure, mechanical properties and RIV paraSubscript textmeter were evaluated and discussed. On the basis of theoretically calculated RIV values and experimental results, resistance to thermal shock damage would be more strongly favoured with composites containing LaPO4calcined at 1100°C for 1 h
Properties of Conductive Polyaniline/Boron Carbide Composites
Authors: Huang Hui , Li Ju Kang , Guo Zhong Cheng
Published: July 2012

Conductive polyaniline/boron carbide (PANI/B4C) composites have been synthesized by in-situ polymerization of aniline in the presence of B4C particles. The structure and thermal stability of obtained composites were characterized by FTIR, XRD and TGA. The results showed that PANI and B4C particles were not simply blended, and a strong interaction existed at the interface of B4C and PANI. In the PANI/B4C composite, the degree crystalline of PANI increased and diffraction pattern of B4C was all but of amorphous. And that the composites were more thermally stable than that of the pure PANI. Electrical conductivity measurements indicated that the conductivity of PANI/B4C composites was much higher than that of the pure PANI and the maximum conductivity obtained was 35.6 S•cm-1 at 20 wt% of B4C.
An Investigation of Mechanical Properties of Al-Mg Porous Materials with Cell Wall Strengthening
Authors: Zhu Li Jun , Zheng Qiang , Zou Min Ming , Shi Hong Gang , Wang Zhen Ming , Shi Li Jun
Published: July 2012

Mechanical properties of Al-Mg porous materials which were made by self melting reactions at low temperatures are investigated in this work. The results showed that the yield strength of Al-20%Mg was up to 240 MPa, and this is the compressive characteristics of brittle porous materials. The excellent of mechanical properties of Al-Mg porous material was analyzed and the reason was ascribed to the homogenous distributed pore with cell wall strengthening.
Mechanical Properties and Microstructure of Two- Layered Cu-Ni-Zn/Cu-Cr Material Joined by Diffusion Bonding
Authors: Kim Ho Byung , Oh Ki Hwan , Hong Sun Ig
Published: July 2012

Two-layered Cu-Ni-Zn/Cu-Cr clad material was prepared by high temperature diffusion bonding and their mechanical performances were examined. Tensile testing was performed on Cu-Ni-Zn/Cu-Cr with the interface plane perpendicular to the stress axis. No intermetallic compounds were observed at Cu-Cr/Cu-Ni-Zn interfaces. In the deformed as-bonded specimen, plastic deformation took place mostly in the softer Cu-Cr alloy although some slip traces and surface irregularity due to grain distortion are discernable in Cu-Ni-Zn alloy. In the deformed heat-treated Cu-Ni-Zn/Cu-Cr, the strength of Cu-Cr increased significantly and plastic deformation occurred mainly in Cu-Ni-Zn with some indication of slight deformation in Cu-Cr close to the interface. Fracture occurred in the necked region of the softer material. The excellent mechanical reliability and the good interfacial bonding strength can be attributed to the absence of detrimental interfacial reaction compounds between Cu-Ni-Zn and Cu-Cr.
Preparation and Characterization of Folate-Targeted Chitosan Nanoparticles Loaded with Hydroxycamptothecin
Authors: Wang Yi Xiao , Hou Zhen Qing , Cui Fei , Shen Li Hua , Xie Li Ya , Zhang Qi Qing , Yi Yun Feng
Published: July 2012

FA-targeted and 10-hydroxycamptothecin loaded chitosan nanoparticles (FA-HCPT-NPs) were prepared with a combination of emulsion-solvent evaporation and chemical crosslink method. The analysis revealed that the FA-HCPT-NPs were spherical with diameter of 255.5  16.2 nm, zeta potential of + 70 mV, HCPT encapsulation efficiency of 81.2% and loading rate of 2.5%. X-ray powder diffraction illustrated that HCPT was buried as an amorphous form in the NPs. The release profiles of HCPT exhibited a biphasic pattern characterized by an initial burst release followed by a slower and sustained release. The results indicated that the novel FA-HCPT-NPs could be a potential drug delivery system for tumor cell-selective targeting therapy.