bluuebunny/crossref_metadata_2025 huggingface dataset:
Influence of Base Thickness on Properties of 1-3-2 Connectivity Cement Based Piezoelectric Composite
Authors: Cheng Xin , Xu Dong Yu , Liao Shuang Shuang , Huang Shi Feng
Published: August 2011

Sulphoaluminate cement and Lead Niobium-Magnesium Zirconate Titanate ceramic (PMN) were used as matrix and functional component to fabricate 1-3-2 piezoelectric ceramic-cement composites by dicing and filling method. The influences of base thickness on piezoelectric, dielectric and electromechanical coupling properties of the composites were analyzed and discussed. The results show that with increasing the base thickness, the piezoelectric stain factor d33 increases gradually, while the piezoelectric voltage factor g33 decreases. The relative dielectric factor εr decreases initially and then increases, while the dielectric loss tan δ increases initially and then decreases. When base thickness is 0.50 mm, εr has the minimum value of 1406. When base thickness is 3.00 mm, tan δ reaches the minimum value of 0.251. With increasing the base thickness, the planar electromechanical coupling coefficient Kp exhibits the decreasing trend, and the thickness electromechanical coupling coefficient Kt and acoustic impedance Z show the increasing trend.
Natural Rubber/Bombyx Mori Silk Fibroin Composites: Preparation and Properties
Authors: Wang Qing Huang , Luo Yong Yue , Yi Zhi Feng , Feng Chun Fang , Wang Yue Qiong , Peng Zheng
Published: August 2011

A novel natural rubber/silk fibroin (NR/SF) antibacterial composite was prepared firstly by using bombyx mori silk fibroin as the antimicrobial filler through latex compounding techniques. The results from scanning electron microscopy and universal tensile machine proved that the compatibility between SF and NR matrix is excellent, and the tensile strength of composite sheets is enhanced to some extent. NR/SF antibacterial composite sheets have a good antimicrobial effect on Escherichia coli and Staphylococcus aureus. Moreover, the suitable loading of SF is 0.5~1 wt% according to the results above.
The Failure Mode and Anti-Crack Performance of the Steel Fiber Reinforced High Strength Concrete Four-Pile Cap
Authors: Gao Dan Ying , Fan Hua , Lei Jie
Published: August 2011

Based on the experiments on 4 specimens with the dimension of 700mm×700mm and different thickness, the failure mode and anti-crack performance of the steel fiber reinforced high strength concrete four-pile cap was studied. The results show that the steel fiber mixed in high strength concrete in four-pile cap enhances its cracking load, limits the propagation of crack obviously and raises the ductility greatly. It also indicates that the ultimate load-carrying capacity of four-pile cap can be improved significantly with the increase of effective thickness.
Application of New Concrete Materials in Channel Lining of the South-to-North Water Diversion Project
Authors: Li Wang Lin , Li Ying Te , Yu Jian Ying
Published: August 2011

Concrete lining is commonly used in large channel project to fixup soil slope and prevent channel seepage. Concrete lining is a type of thin plates structure which should have the high compression strength, crack resistance and durability. Two new high performance concrete (HPC) are used in lining project of south main channel of Yellow River-crossing project in east-route of the South-to-North Water Diversion Project. One is flyash HPC with manufactured-sand and the other is HPC with cementitious capillary crystalline waterproofing material (CCCW); meanwhile, the mix proportion of flyash HPC with manufactured-sand and HPC with CCCW are recommended. For flyash HPC with manufactured-sand, the recommendatory water-binder ratio is 0.4 and the recommendatory flyash content is 30%. For HPC with CCCW, the recommendatory water-binder ratio is 0.48 and the recommendatory CCCW content is 1.5%.With the wide application of new HPC, the compression strength, crack resistance and durability of lining concrete are improved, channel seepage discharge is reduced and a large amount of natural building materials are saved.
Effect of Doped with BaO on the Formation Dynamics of Alite in Alite-Rich Cement Clinker
Authors: Wang Shou De , Guo Xiang Yang , Lu Ling Chao , Cheng Xin
Published: August 2011

Effect of doped BaO on the formation dynamics of alite of alite-rich cement clinker was investigated. The experimental results indicated that its formation kinetic satisfied with three- dimensional spherical model and accorded with Glinstling diffusion equation. Doped BaO could decrease dramatically the apparent activation energy of alite-rich cement clinker. This was contributed to the combination of C2S and CaO in liquid phase, and acceleration of formation of alite-rich cement clinker.
Optimal Design of a Pin-Fin Heat Sink Using a Surrogate-Assisted Multiobjective Evolutionary Algorithm
Authors: Kanyakam Siwadol , Bureerat Sujin
Published: August 2011

In this work, performance enhancement of a multiobjective evolutionary algorithm (MOEA) by integrating a surrogate model to the design process is presented. The MOEA used in this work is multiobjective population-based incremental learning (PBIL). The bi-objective design problem of a pin-fin heat sink (PFHS) is posed to minimize junction temperature and fan pumping power while meeting design constraints. A Kriging (KRG) model is used for improving the performance of PBIL. The training points for constructing a surrogate KRG model are sampled by means of a Latin hypercube sampling (LHS) technique. It is shown that hybridization of PBIL and KRG can enhance the search performance of PBIL.
New Developments of Product Design Methodology
Authors: Wen Bang Chun , Wang Xue Jun , Dai Ji Shuang , Ma Xing Guo , Ren Zhao Hui , Li Xiao Peng , You Xiao Mei , Liu Jie , Liu Yang
Published: August 2011

Design and R&D (Research and Development) of products play an important role in development and competitiveness of enterprise. How to do the works better We think that most advanced product design methodology should be used on design, research and development of products. So-called most advanced product design methodology is that based on “the Scientific Outlook on Development” that we set up recent years. New developments of product design methodology include: At first it has been classified that more than seventy theories and methods proposed by domestic and overseas scholars in recent 100 years; QCTES was instead of IQCTES including six requirements of product design; traditional design stages were replaced with four new stages including investigation, planning, implement and inspection; green design was replaced with harmonious design; traditional design method was replaced with deep-layer design method; concept and connotation of product top-layer design were proposed; more detailed contents of product systematic design were advanced; formulas of complete system and product design quality, and connection equation between design objective, design content and design method were submitted. We got good effects to apply above product design methodology on many product designs recent years.
Forward Kinematics Simulation Analysis of Slider-Crank Mechanism
Authors: Qian Yu , Cao Yi , Liu Yuan Wei , Zhou Hui
Published: August 2011

This paper mainly addressed the kinematics simulation of the Slider-Crank mechanism. After proposing a mathematical model for the forward displacement of the slider-crank mechanism, the mathematical models for the forward velocity and acceleration of the slider-crank mechanism are constructed, respectively and the simulation models for the forward kinematics of the slider-crank mechanism are constituted in the Matlab/Simulink simulation platform. Finally the forward kinematics simulation of the slider-crank mechanism was successfully accomplished based on Matlab/Simulink. Examples of the simulation for the forward kinematics of a slider-crank mechanism are given to demonstrate the above-mentioned theoretical results.
Study on the Design of Longitudinal-Torsional Composite Ultrasonic Elliptical Vibrator Based on FEM
Authors: Yin Zhen , Li Hua , Wang Bang Fu , Song Ke Feng
Published: August 2011

Based on FEM, a new type of ultrasonic elliptic vibrator design method was proposed, the ultrasonic elliptic vibration was achieved by the structural curve of the longitudinal and torsional vibrations. The impedance and vibration characteristics of the new longitudinal-torsional composite ultrasonic elliptic vibrator prototype were tested. It provides an important basis for impedance matching and longitudinal-torsional composite ultrasonic elliptical vibration application.
Fitting and Verification Viscosity Parameter of ABS/Aluminum Blends
Authors: Zhu Hai Yan , Xiao Xiao Ting , Zhang Zhu Heng
Published: August 2011

Datas which are ABS and aluminum powder blends shear rate and shear viscosity have been tested by capillary rheometer.Fitting parameters of Cross-WLF viscosity model and using the material parameters to establish the appropriate database which is in CAE software.At the same time the database is used to established for studying the warpage of plastic parts,to compare the account of warpage of the actual injection,the warping deformation obtained results of two methods are very similar.Demonstrate the effective of using the database established in CAE analysis.
Laws of Technological System Evolution Applied in the Conceptual Design of New Stereo Garage
Authors: Zhang Ming Qin , Cong Dong Sheng , Qin Hai Ying , He Qin , Zhang Sha Sha
Published: August 2011

Based on lines of technological system evolution in TRIZ, the seminar analyzed the current situation of the stereo garage development, summarized the evolutionary lines, mapped out the potential evolution diagram of stereo garage combining with improved evolutionary potential diagram, and concluded evolutionary potential in automation, spheroidality, intellectualization, standardization and multi-systematic. Based on the above, a new model for conceptual design of the stereo garage was raised. The success of the design and trial production of new stereo garage indicated the feasibility of application of technical system evolution law in predicting the future development of product.
Microstructure and Microwave Sintering Behavior of TiB2/Cu Composites
Authors: Zhang Jian Ping , Zhang Meng , Zuo Hong Yan
Published: August 2011

In order to investigate the effect and sintering behavior of microwave on TiB2/Cu composite powder compacts, Cu-5vol%TiB2and Cu-10vol%TiB2composites were prepared by microwave sintering. The X-Ray Diffraction (XRD) results show that no new crystal phase appears during the sintering process. SEM results illustrate that TiB2particles evenly distribute over the composites, but the bad wettability between the Cu and TiB2results in the interface of the composites not ideal. The density of Cu-5vol%TiB2sintered sample is higher than that of Cu-10vol%TiB2, but the microhardness is lower. Scanning electron microscope (SEM) analysis of the free-packed powder shows that the microwave sintering of Cu-TiB2composites starts from the branch side of Cu powders, and then as the sintering continuing, the composites gradually realize the densification through atomic surface diffusion and bulk diffusion. At the same time, liquid phase sintering occurs in the experimental conditions.
Characterization on Aggregating Structure of Aloe Extract Crosslinked Cotton Fabric
Authors: Xu Yun Hui , Chen Li
Published: August 2011

For exploiting the multifunctional ecological cotton textile products and developing the green modified technology for cotton fabrics, a novel cotton fabric with aloe extract crosslinking was prepared using citric acid as a crosslink agent under the pad-dry-cure procedure. Scanning electron microscopic photographs showed that the modification with aloe extract occurred on the surface of cotton fabric. FT-IR spectra of the modified fabric illuminated that aloe extract crosslinked with cotton fabric through the bridge linkage of citric acid after a series of reaction. The wide angle X-ray diffraction analysis indicated that the crystallinity of aloe extract modified cotton fabric slightly decreased. Furthermore, the changes in the aggregating structure and crystallinity were also reflected in the mechanical property studies of these modified fabrics. After treatment by aloe extract, the breaking strength and elongation of cotton fabric decreased. However, the moisture regain of the modified cotton fabric increased. The results obtained are useful in explaining structure-property correlations with respect to the aggregating structure and crystallinity, and suggest valuable information in planning applications for the aloe extract modified cotton textile products.
A New Preparation Method of Fe-WC Composite Ceramic Powder through Ball Milling
Authors: Li Wei , Wu Cheng Ge , Fang Qiang Han
Published: August 2011

The iron-based composite ceramic powder Fe-WC is produced by ball milling with synthetic tungsten mine and graphite. The process is accomplished through mechanical activation and reductive diffusion of the reactant powders during the milling process. The products are analyzed by means of XRD, DTA and EPMA. The results approved that the reaction does not carry through completely when the milling time is less than 8h. However, the composite powder of Fe and WC is gained by annealing from powders milled under 180V of the milling machine. The apparent activation energy of the reductive reaction is gradually decreased with the extending of milling time by mechanical activation.
Study on the Preparation, Structure and Performances of Antibacterial PET Masterbatch
Authors: Hou Wen Sheng , Niu Mei , Dai Jin Ming , Shi Sheng , Wu Zi Lu , Li Yin
Published: August 2011

The antibacterial PET (polyethylene terephthalate) masterbatch was extruded from twin screw extruder, using silver and zinc-loading Nano-SiO2 antibacterial agent (SLSZ) as the functional material. The content of SLSZ and extruding techniques were investigated. The dispersion and compatibility of antibacterial agent in antibacterial PET masterbatch were further characterized using Scanning Electron Microscopy and Transmission Electron Microscopy. The antibacterial performances and adsorption process of the antibacterial PET masterbatch against Escherichia coli (E. coli) were tested using alive-bacteria-counting method. The experimental results indicate that when the content of SLSZ was 30 wt. %, the antibacterial agent with an average diameter of 150nm showed excellent dispersion and compatibility in antibacterial PET masterbatch, and had excellent antibacterial performances. The adsorption process of antibacterial PET masterbatch against E. coli was controlled by Coulomb force between them. As the amount of the antibacterial PET masterbatch increased, the adsorbing rate and capacity were increased.
Research on the Hydrology Telemetry System of Poyang Lake Based on GPRS
Authors: Zeng Xuan , Tu Zhen Yu , Ma Yong Li
Published: August 2011

TThe paper mainly discuses the design and application of the hydrology telemetry system based the GPRS technology. Owing to the low power consuming CPU and application of GPRS, the telemetry system realizes the data acquisition, remote control and data communication; it plays an important role in the accurate monitoring and control of Poyang Lake
The Effects of Magnetic Field on the Deposited Performance of CrN Films by Magnetron Sputtering
Authors: Jean Ming Der , Chou Ming Tsong
Published: August 2011

This paper reports the effects of varying magnetic field strength on CrN films, deposited by a magnetic sputtering process. The strength of magnetic field in unbalanced magnetic sputtering processes is controlled by adjusting the gap distance between the magnet set and the target surface (GDMT). An improvement in overall intensity, at low GDMT, was observed by adjustable magnetic field distributions. In the chamber, it was readily noticeable that varying the magnetic field strength has an influence on the CrN structures. In experiments, at low GDMT, a high hardness value and lower wear rate become visible in the CrN films. In addition, the CrN films formed have a smooth surface with a dense tiny structure and display preferential orientation in the Cr2N(111) and Cr2N(002) planes, whereas CrN films prepared at higher GDMT exhibit more roughness and the CrN (200) plane is evident. Furthermore, the Cr2N (111) (002) plane possessed better tribological properties than that of the CrN(200) plane, where the wear scars show little failures on the coating surface.
High-Temperature Performance of Amorphous Nickel Hydroxide Coated with La(OH)3
Authors: Liu Chang Jiu , Qi Mei Rong , Xing Chun Xiao
Published: August 2011

La(OH)3coated amorphous nickel hydroxide was prepared by chemical coprecipitation method. The microstructure, surface morphology and chemical composition of the prepared sample were analyzed by X-ray diffraction (XRD) and scanning electron microscopy (SEM) equipped with energy dispersive spectroscopy (EDS). Electrochemical performances of the sample were characterized by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and charge/discharge measurements. The results demonstrated that the coating of La(OH)3 dramatically decreased electron transfer resistance and increased oxygen evolution potential of amorphous nickel hydroxide. Moreover, the high-temperature performance of amorphous nickel hydroxide was significantly improved after the coating of La(OH)3.
Application of Error Design Idea to Deal with the Shafting Error of Photoelectric Theodolite
Authors: Pu Peng Cheng , Guo Xiao Song , Zhou Zhao Fa , Wang Yu
Published: August 2011

The method to deal with the Shafting Error of photoelectric theodolite was designed according to the error design idea. The effect law between azimuth angle measure error of photoelectric theodolite and shafting error was studied based on MATLAB, and the simulating result reveals that the affect to azimuth angle measure error by each of the three-axis error was separately, and the final affect result can be account by adding each of the result, and the affect by collimation axis error and abscissa axis slop error can be eliminated by the normal-reversed measure method. According to the result above, the method for amending the azimuth angle measure error of photoelectric theodolite was proposed, and the Matlab simulating result proved the method is feasible.
Removal of Formaldehyde Using the Aminated Activated Carbon by Etilenodiamina
Authors: Tang Jian She , Huang Xian Huai , Xiang Li
Published: August 2011

In order to remove formaldehyde efficiently, the activated carbon was oxidized by nitric acid and then modified by etilenodiamina. The carbon treated with nitric acid and etilenodiamina showed the significant differences in IR spectrum compare with original activated carbon. The adsorption capacity for the formaldehyde of prepared carbon and original carbon were 2.4 mg/g and 1.0 mg/g, respectively. Results demonstrate that the amino group on carbon might improve the adsorption performance of carbon for formaldehyde.
Research on Process and Pollution of Atmospheric and Vacuum Distillation
Authors: Li Hong , Zhang Yong Li
Published: August 2011

Key words：Atmospheric and vacuum; distillation; process; pollution Abstract：The atmospheric and vacuum distillation unit was analysed on the device's size, composition, technical route and process. The results show that the flue gas produced by atmospheric and vacuum furnace is the main emission source, and the main pollutants in the flue gas are SO2, NOX and soot. The wastewater pollution is mainly electric desalting salt water, and it was treated in saline wastewater treatment plant in the factory.
Design and Research on Mechanical Properities of New Type Low Modulus Biomedical Metastable β Titanium Alloy
Authors: Liu Shuang Jin , Cai Fen Fei , Cui Chun Xiang , Yao Xun , Zhao Li Chen
Published: August 2011

One new type metastable β-titanium-alloy for biomedical applications Ti-25Nb-2Mo-4Zr (wt %) with lower elastic modulus was designed based on the d-electron alloy design method and prepared in this study. The microstructure and basic mechanical properties of designed alloy were investigated in this paper. The test results show that the Yang’s modulus is 65GPa and the tensile strength is 863MPa of designed alloy after solution treatment at 700°C for 0.5 h; the Yang’s modulus is 68GPa and the tensile strength is 1032MPa for the designed alloy after aging treatment at 500°C for 2 h. The designed alloy with lower Yang’s modulus is expected to have good prospects for implant biomaterials for its excellent biomechanical compatibility.
Error Correction of Theory Model in Process-Stress Accelerated Test
Authors: Guo Chun Sheng , Du Qian Qian , Feng Shi Wei
Published: August 2011

To correct error in theoretical model of process-stress accelerated test, a new calculation method is proposed. The new method, based on computer-aided calculation, can significantly reduce the error of the model. Theoretical data is calculated using both the new model algorithm, which is the root test method, and the old model algorithm. The results show that the old model algorithm can generate error more than 13% in the activation energy and error more than 150% in the extrapolated lifetime (Q≤1.0eV), while the new model algorithm generates error less than 1% in activation energy, and error less than 4.1% in the extrapolated lifetime.
Hydrothermal Synthesis of Hydroxyapatite Urchins and its Drug Release Property
Authors: Yang Li Xia , Liu Quan Wen , Liang Tao , Yin Jia Jun , Qin Lai Fen , Tang Ying Ying , Jiang Xiang Peng
Published: August 2011

Hydroxyapatite (HAP) urchins were synthesized by a facile hydrothermal method using calcium nitrate, ammonium dihydrogen phosphate, diamine tetraacetic acid disodium salt as complexing agent and ethonalamine as alkaline source. The influence of hydrothermal time on crystallinity and morphology of HAP have been investigated. The results indicate that well-crystallized HAP urchins can be synthesized at 180°C for 24h. SEM images show a large area of urchin-like microspheres consisted of a number of ribbons with lengths ranging from 2 to 5μm. Based on XRD and SEM results, the formation mechanism of HAP crystals has been discussed. A typical anti-inflammatory drug, ibuprofen, was used for drug loading, and the release behaviors of ibuprofen in a simulated body fluid (SBF) were studied. The results indicate that HAP urchins showed a favorable sustained release property for ibuprofen.
Template Induced Synthesis of Nano-Hydroxyapatite by Co-Precipitation Method
Authors: Sun Yan Rong , Fan Tao , Wang Chang An , Ma Li Guo , Liu Feng
Published: August 2011

Nano-hydroxyapatite with different morphology was synthesized by the co-precipitation method coupled with biomineralization using Ca(NO3)2•4H2O and (NH4)2HPO4 as reagents, adding chondroitin sulfate, agarose and aspartic acid as template. The structure and morphology of the prepared powders were characterized by X-ray diffraction (XRD) and transmission electron microscope (TEM).
Review of Working Performance Modeling and Optimization of Cone Crusher
Authors: Ma Yan Jun , Fan Xiu Min , Yue Shuang Jie , Dong Gang
Published: August 2011

Improving working performance of cone crusher contributes to developing cone crusher of new style, high efficiency, energy saving and environment protection. In the past few decades, a large number of research results were obtained in the performance optimization of cone crushers. By collection, classification and study of the achievements on relevant literatures, patents and research results link to cone crusher, the research of modeling of working performance, crushing chamber optimization, real time optimization of cone crusher and application of discrete element method for optimization of cone crusher are presented. Several problems on crushing theory, optimization method and objective function that need be further studied and developed are also discussed.
Study on a Kind of Rust-Transforming Technology
Authors: Zhang Kun , Song Yu Su , Zhong De Huan , Shao Zhen Hai , Zhou Li Qing
Published: August 2011

Several rust-transforming reagents based on phosphating technology were studied. The reagents respectively contained potassium ferrocyanide, aromatic oximes (SO) or amide material (GA). By dripping CuSO4 test, linear polarization and polarization curves test, the anti-corrotion performance of phosphate coating were characterized. The results showed that: GA and SO could improve the anti-corrosion performance of phosphate coating. SO restrained the dissolution of metal relying on strong chelation, and the restrained effect of GA depended on durative oxidation and chelation. Comparing to SO, GA could enhance the density of phosphating coating significantly. In addition, the chelation of potassium ferrocyanide had little effect with the anti-corrosion performance.
Skip Neighborhood Hybrid Particle Swarm Optimization Algorithm
Authors: Li Jian Jun , Yu Bin , Chen Wu Ping
Published: August 2011

Traditional Particle Swarm Optimization (PSO) uses single search strategy and is difficult to balance the global search with local search, and easy to fall into local optimization, a new algorithm which integrates global search with local neighborhood search is presented. The algorithm performs the global search in parallel with the local search by the feedback of the global optimal particle and the information interaction of local neighborhood. Meanwhile, with a new neighborhood topology to control the search space, the algorithm can avoid the local optimization successfully. Tested by four classical functions, the new algorithm performs well on optimization speed, accuracy and success rate.
Research on Overconstrains of Planar Mechanisms
Authors: Wei Zeng Ju , Pang Shan
Published: August 2011

Planar mechanism is the basic structure of mechanical products which are used most widely. The motion of mechanism is based on constraints. In this paper, In this paper, the reason and influence of overconstrains in the planar mechanisms are discussed and defined, and presents the formula for the number of overconstrains in the planar mechanisms.
Assesment of Main Models for Predicting Debonding Load-Bearing Capacity against Intermediate Crack-Induced Debonding Failure in FRP-Strengthened RC Beams
Authors: Li Gui Bing , Guo Yu Gang , Sun Xiao Yan
Published: August 2011

intermediate crack-induced debondingis one of the most dominant failure modes in FRP-strengthened RC beams. Different code models and provisions have been proposed to mitigateintermediate crack-induced debondingfailure.However, these models and provisions can not mitigate this failure mode effectively. Recnetly, new models have been proposed to solve this problem. Out of all the existing models, four typical ones are investigated in the current study. A comprehensivecomparison among these models is carried out in order to evaluate their performance and accuracy. Test results ofﬂexural specimens with intermediate crack-induced debonding failurecollected from the existing literature are used in the current comparison. The effectivenessand accuracy of each model have been evaluated based on these experimental results. It is shown that the current modals are all conservative and inadequite to effectively mitigate intermediate crack-induced debonding in flexurally strengthened members.
Study on CO2 Sequestration Property of Cement Based Composite Cementitious Materials Containing Steel Slag Used in Road
Authors: Gao Ying Li , Cheng Ling
Published: August 2011

Cement based composite cementitious material containing steel slag used in road has been prepared to deal with the current situation that the transportation carbon emission increased year by year. In this material, 40% cement has been replaced by equivalent steel slag, which has the ability of CO2sequestration. This paper studied the CO2sequestration effect and the mechanical properties of the pure cement, the pure steel slag, and the cement based composite cementitious materials containing steel slag. It has been shown that the cement based composite cementitious materials containing steel slag have excellent CO2sequestration property. The mass fraction growth rate of carbon reached 10.86% after 1 hour carbonation experiment, the value between which of pure cement and pure steel slag, and the compressive strength of the composite cementitious materials at 28-day age can reach 45.3MPa, meeting the requirements of road.
Preparation and Properties of PA66/PP/MOS Whisker Composites
Authors: Peng Jian , Cao You Ming
Published: August 2011

The composites composed of polyamide66（PA66）, polypropylene（PP）, and magnesium oxysulfate whisker(MOS) were prepared by means of melt blending through co-rotation twin screw extruder. The standard samples were prepared by injection machine. The effect of coupling agents on the whisker surface, and the influence of MOS content on mechanical properties, heat properties, flame-retardant properties and the microstructure of the composites were investigated by scanning electron microscopy(SEM), thermogravimetry(TG) and differential scanning calorimetry(DSC) techniques, respectively. The results showed that the MOS whisker modified with coupling agents KH570 possesses better activation exponential and dispersity, and the tensile strength, flexural strength and toughness of PA66/PP/MOS composite were firstly increased and then decreased with the MOS content increasing, the optimum adding amount of MOS was 25phr. The flame retardant property was improved remarkable by adding of MOS.
Performance Evaluation of High-Modulus Asphalt Mixture
Authors: Wu Chun Ying , Jing Bin , Li Xiao Yan
Published: August 2011

According to LPC Bituminous Mixtures Design Guide, performance of several kinds of additives for high modulus asphalt mixture is evaluated by tests. It has done performance comparison among AC20, Sup20 and EME20 using AH70# asphalt. The results show that high modulus asphalt mixture EME2 has high temperature stability and anti-fatigue capability. The testing results in the article had proved that the existing China-made additives can also meet the requirement of High Modulus Asphalt Concrete (HMAC). The mix design of AC20 and Sup20 was done according to LPC Bituminous Mixtures Design Guide, test results are basically the same as EME20 and meet the design requirement. So it can consider using HMAC which satisfies China’s requirement in China.
The Study of the Large-Sized High-Quartz Translucent Porcelain Plate
Authors: Liu Yi Jun , Wang Xiu Feng , Huang Jian Feng , Liu Jie , Wang Qing Gang
Published: August 2011

A large-sized high-quartz translucent porcelain plate was developed, which has good decorative effect and market prospects. The light transmittance of the high-quartz translucent porcelain plate (Its thickness: 3.6mm) reaches 0.72%. Compared to other large-sized translucent plates, large-sized high-quartz translucent porcelain plates have obvious advantages about mechanical properties, glossness and the price.
Modeling of Passive Adaptive MR Damper
Authors: Gu Xiao Lei , Tang Zhi Feng , Lv Fu Zai , Liu Lei
Published: August 2011

Passive adaptive MR damper is a new type of damper based on GMM inverse effect and MR effect, and it doesn’t need energy devices and can realize external force self-adaptation. A model of passive adaptive MR damper is established based on Jiles-Atherton model, the law of approach for the magnetomechanical effect, the magnetic circuit law and Bingham model. Experimental results show that the value of damping force is related to displacement and velocity: the larger the displacement, the greater the damping force; the faster the speed, the greater the damping force. This is consistent with the model.
Effects of Temperature, Relative Humidity and Washing Times on the Electrical Conductivity of Carbon-Coated Filaments
Authors: Ding Xiao Jun , Xu Yu Hong , Liao Li Fang , Zou Feng Yuan
Published: August 2011

The stability of conductivity is evaluated by measuring the resistance of Carbon-coated Filaments (CCFS) and analyzing the influence of temperature, relative humidity and washing on the resistance and relative resistance. The result shows that the with the increase of temperature and relative humidity, the resistance value trends to negative increase, and the electrical conductivity increases. Compared to temperature, the relative humidity has more influence on the electrical conductivity of CCFS. With the increase of washing times, the conductivity coating breaks off which results in the decrease of electrical conductivity.
Development of Green Remanufacture Mechanized Production Line which Use for 200L Oil Drum (iron) Circulation Use
Authors: Li Duo Min
Published: August 2011

The 200L oil drum is widely applied as a result of its various aspects superior performance, implementation of 200L oil drum implementation circulation use may reduce the production cost, reduces the environment pollution and the resources waste, therefore the 200L oil drum's circulation use has the enormous prospect. Based on the oil drum orthopedic, outside surface clean, internal surface clean, drying four critical processes, this article has developed the 200L oil drum circulation use mechanization production line. This production line has made significant improvements on the production technology and automation. The device will not only improve the quality of the renovation of oil drums but also improve production safety.
Effect on Formation of 5083 Aluminum Alloy of Activating Flux in FBTIG Welding
Authors: Zhao Yong , Yang Gang , Yan Keng , Liu Wei
Published: August 2011

FBTIG(Flux Bounded TIG)welding experiments for aluminum alloy were made using five species of single-component activating fluxes, including SiO2、TiO2、CaF2、MgO, and NaCl, which was carried out to investigate the effects of flux gap and activating fluxes on weld formation. The mechanism of increasing welding penetration was analyzed linked with the change of arc shape in FBTIG. The experimental results indicate that five species of single-component activating fluxes can increase weld penetration obviously. Specifically, SiO2 can increase weld penetration remarkably. When flux gap is 4mm, the D/W (depth/width) ratio of weld for FBTIG welding reaches 0.59. The significant increase of weld penetration is the result of comprehensive effect by arc contraction and reversal of the surface tension gradient in the liquid metal.
High Performance Cu-Based Friction Material Reinforced by Nanometer Materials
Authors: Du Jian Hua , Han Jian Guo , Xu Cheng Fa
Published: August 2011

The Cu-based friction materials with nano-AlN (n-AlN) and nano-graphite (n-C) were prepared by powder metallurgy technology, respectively. The microstructures and friction performance were studied through scanning electron microscope (SEM) and friction tester rig, respectively. The results indicate that the n-AlN and n-C particles can enhance the properties of Cu-based friction materials remarkably. Compared with the friction materials without any nanometer materials, the wear resistance of the friction materials with n-AlN and n-C has been improved by 25 % and 11 %, respectively. The heat resistance of the materials with n-AlN and n-C has been improved 18 % and 25 %, respectively. The n-AlN and n-C particles can reduce the abrasive wear and enhance the wear resistance of the Cu-based friction materials.
Effects of Annealing Technique on Texture Attenuation of Hot-Rolling AZ31 Magnesium Alloy Sheets
Authors: Qu Jia Hui , Huang Tao , Gao Ming , Wang Fu
Published: August 2011

A strong basal plane texture of AZ31 magnesium alloy was obtained by severe hot-rolling with three passes falling temperature. The effects of annealing time and annealing temperature on the evolution of texture at different layers were studied by means of X-ray texture analysis. The results showed that the orientation density of basal plane texture component was reduced greatly tending to dispersion with increasing annealing time and temperature. The hard orientation can be greatly weakened by softening annealing, the best basal plane orientation was obtained when the annealing time is 60min and the annealing temperature is 150~300°C. A texture gradient along thickness direction with annealing has been found in the sheet. The texture gradient was the lowest when the annealing time is 60min and the annealing temperature is 300°C.
Influence of Different Titanium Alloying Methods on the Microstructure and Wear Behavior of ZL108 Alloy
Authors: Liu Niu Can , Li Jun Qing , Li Gang
Published: August 2011

Two kinds of ZL108 alloys containing titanium are produced with electrolytic low-titanium aluminum alloy (named as ZL108D) and pure aluminum as well as Al-Ti master alloy (named as ZL108R) respectively. The influence of different titanium alloying methods on the microstructure and wear behavior is investigated. The result shows that it is an effective for grain refining of ZL108 alloy by adding titanium to the melt before casting. Addition of titanium can improve the wear resistance of ZL108 alloy, while ZL108D is superior to ZL108R. It is attributed to the addition with electrolytic low-titanium aluminum alloy results in better grain refinement.
Influence of Precipitate Phase on the Strain Rate Sensitivity of Mg-Gd-Y Alloy
Authors: Zhang Fan , Tan Cheng Wen , Cai Hong Nian
Published: August 2011

Supersaturated Mg-Gd-Y alloy followed by aging at 225 °C with different times were subjected to quais-static and dynamic strain rates to determine the influence of precipitate phase β′ on the strain rate sensitivity of magnesium alloy. Strain rate sensitivity (SRS) decreases with the increase of the size of β′. SRS decreases from initial condition to peak-aged condition due to the β′ increases the athermal component of flow stress. On the other hand, the influence of precipitate interfaces on dislocation generation and storage mechanisms may be responsible for the decrease of SRS from peak-aged to over-aged condition.
Influence of Cooling Rate on the Microstructure of Bainitic Steel
Authors: Wang Zhi Fen , Guan Yun , Wu Li Xin , Sun Yi Qiang , Han Rong Dong
Published: August 2011

The microstructure of a bainitic steel after different cooling rates has been investigated by transmission electron microscopy (TEM) and electron backscattered diffraction (EBSD). The effect of cooling rate on the intermediate transformation microstructure was studied. The results showed that the final microstructure contained complex mixture of bainitic ferrite, granular bainite and polygonal ferrite. There was mainly lath-like bainitic ferrite at fast cooling rate (20Ks-1), while microstructure in samples cooled with intermediate rates (8~15 Ks-1) contained bainitic ferrite and granular bainite. When cooling rate decreased to less than 5Ks-1, polygonal ferrite occurred.
Consistency Maintenance of Collaborative Product Design Based on the Semantics Reasoning
Authors: Chen Liang , Zhang Shao Ping , Huang Bin , Wang Wei
Published: August 2011

Consistency maintenance is a key problem in collaborative product design. Firstly, based on product design theory, the semantics relationships described by XML among components in collaborative product design system are made. Secondly, the associated components are determined through backward and forward semantics reasoning. Finally, the data is updated by constraints solving, and the consistency maintenance is achieved.
Study of Effect of Ce-Rich Mixed Rare Earth on Corrosivity of New 5XXX Series Aluminium Alloys
Authors: Shen Hua , Liang He , Yang Wei Dong , Liu Bing Xiang , Li Tian Shu , Yao Guang Chun
Published: August 2011

In this paper, AL-Mg-Mn-RE series alloys are becamed object of study.They are prouced with pure alumimum, pure Mg,electrolytic Mn and mix rich Ce rare earth. The effect of rare earth content on the resistance of the Al-Mg-Mn-RE series alloys are investigated by using Anodic polarization curves, electrochemical impendance spectroscopy. The results showed that their corrosivity is influenced by RE content in aluminum alloys.NO.3.3 impedance of Al-Mg-Mn-RE alloys is larger in the Nyquist diagram and its corrosion current of alloy decreases obviously. Then corrosivity of alloy is the best and the RE content is 0.3%,When the RE content is higher or lower than it that corrosivity isn’t improved but descended.
Effect of Y2O3 Addition on the Microstructure and Corrosion Behaviour of Laser Cladding of Al Powder on ZM5 Magnesium Alloys
Authors: Chen Chang Jun , Cao Qin , Xu Xing , Zhang Min
Published: August 2011

The aim of this work was to improve the surface layer properties of the Mg-Al-Zn cast ZM5 magnesium alloys by melting and preplaced Al powder or Al+Y2O3 powder on the surface. Laser processing was carried out using high power continuous wave CO2 laser. The resulting surface layers were examined using metallographic light microscopy, scanning electron microscopy, X-ray diffraction. The corrosion resistance was detected by potendiodynamic polarization test. The morphology of the Al cladding coatings are dendrities. And the coatings have excellent corrosion resistance compared to the untreated ZM5 substrate. The enhanced corrosion resistance coating doped with Y2O3 was attributed to the refined microstructure induced by Y2 O3
Construction of a New Genetic Engineering Bacterium for Preparation of Superoxide Dismutase with High Productivity
Authors: Zhao Yi , Li Yang , Li Ren Qiang
Published: August 2011

A new Mn-SOD gene encoding 202 amino acids was cloned from genomic DNA of Bacillus subtilis ATCC 9372 for construction of a genetic engineering bacterium to produce SOD. Its phylogenetic relationships with other Bacillus spp. revealed that this predicted protein is most closely related to B. atrophaeus NRS-213 (AY197616) and B. subtilis 168. This gene was inserted into expression plasmid pET28a and first successfully expressed in E. coli BL21. The SOD was expressed accounted for approximately 45.6% of total bacterial protein. The activity of the SOD was 2553.211 U/mg, the enzyme showed maximum activity at about pH 8.0 and relatively stable from pH 6.0 to 11.0. This SOD had a good thermal stability with >75% retaining of the relative enzymatic activity after incubation at 50 °C for 90 min. This study demonstrated that a new genetic engineering bacterium to produce SOD with high productivity has been successfully constructed.
Real-Time Vibration Control of Steel Strip Immersed in Fluid for a Continuous Hot-Dip Galvanizing Line
Authors: Li Jian , Yan Yun Hui , Guo Xing Hui , Wang Yan Qing
Published: August 2011

A method of combining theoretical analysis with numerical simulation is presented to achieve real-time vibration control of steel strip immersed in fluid during continuous hot-dip galvanizing process. Theoretical and numerical methods are employed to investigate inherent properties of strip and immersed strip, respectively. Multivariate quadratic regression is adopted to fit the ratio of natural frequencies. Keeping inherent frequencies far from excitations is taken as optimization objective, based upon field testing results. Real-time vibration control of immersed strip near the air knife box is carried out by varying production parameters. The results reveal that width, thickness, tension and molten zinc have noticeable and highly nonlinear effect on inherent properties of steel strip. Axial speed of strip is negligible in calculations of natural frequencies. Wind load of air knife moving relative to strip is the principal source of vibration. The approach of combining theory with numerical computation can meet the requirement of real-time vibration control of alloy strip.
An Improving Approach for 6σ-Based Multi-Process Machining Environement
Authors: Zhou Guang Hui , Wang Ben , Xiao Zhong Dong , Jiang Ping Yu
Published: August 2011

In the 6σ-based product quality management system, influencing factors of 5M1E (man, machine, material, method, measure and environment) are the key points to ensure the quality of products reach 6σ level. However, because the traditional quality control methods only focus on the factors of machine, material, method and measure but ignore the factors of man and environment and their relationship on product quality, the 6σ level objective of product quality cannot be implemented well. As such, this study proposes an improving approach for 6σ-based multi-process machining environment whose objective is to build the connection relationship and model among operating environment, workers and product quality. Through adjusting the values of operating environmental parameters, the behaviors of workers on machines can be controlled and the product quality can be improved. This study provides a new solution for 6σ-based product quality control and management.
Numerical Simulation of Filling Process in Vertical Centrifugal Casting Based on Projection-Level Set Method
Authors: Zhang Jun , Zhou Jian Xin , Zhang Ming Yuan , Pang Sheng Yong , Liao Dun Ming , Yin Ya Jun , Shen Xu
Published: August 2011

A three-dimensional incompressible two phase flow model of vertical centrifugal casting is proposed to simulate the fluid flow of mould filling process accurately and effectively. The Projection method is adopted to solve the govern equation of the flow field, and the Level Set method is used to capture the free surface. The mold filling of a complex part with thin-wall is simulated. The numerical result shows that the Projection-Level Set method could simulate centrifugal casting effectively. The present study has a guiding significance to the production of vertical centrifugal casting.
Auto-Body Panel Springback Analysis Using Yoshida-Uemori Model
Authors: Hu Kang Kang , Peng Xiong Qi , Chen Jun , Lu Hong Sheng , Zhang Jian
Published: August 2011

The forming process simulation and springback prediction of an automobile body panel is implemented by using JSTAMP/LS-DYNA. Yoshida-Uemori model is selected to characterize the anisotropic material behavior of sheet metal during forming. Simulation predictions on spingback are compared with experiment measurements along with numerical results from other material models to demonstrate the effectiveness and accuracy of the Yoshida-Uemori model.
Study on Microstructure and Properties of 5A06 Aluminum Alloy Welded Joint by Deep Cryogenic Treatment
Authors: Gao Shan , Wu Zhi Sheng , Jin Peng Fei , Wang Jun Jie
Published: August 2011

In this paper, some deep cryogenic treatment experiments are first applied to 5A06 aluminum alloy welded joint at liquid nitrogen temperature （-155°C ）for 4h, 8h, 10h respectively. 5A06 alloy welded joints before and after deep cryogenic treatment are observed by X-ray diffraction and scanning electrical microscopy. The experimental results have shown that the deep cryogenic treatment causesβphase of alloy to disperse and makes the grain smaller than that of joint before deep cryogenic treatment. Therefore, the mechanical properties of 5A06 alloy welded joints after deep cryogenic treatment are greatly improved.
The Study of High Strength Bolt Preload with Hydraulic Tensioner Installation
Authors: Guo Tie Neng , Li Gen , Cai Li Gang , Wang Zhi Liang
Published: August 2011

Preloading the high strength bolt using hydraulic extension method is a fast and efficient method for bolt installation. Hydraulic bolt tension device can guarantee the initial tension of bolt well. However, if the relation of initial tension and the final remaining preload of bolt cannot be determined, the preload on the bolts still cannot be guaranteed. This paper uses theoretical analysis method to research the relation between the eventual preload and the initial tension of high strength bolts on Heavy-duty Gantry beams. Then we proposes a set of calculation method of bolt installation preload and the initial tension and provides theoretical basis for the installation of heavy-duty segmented beam.