bluuebunny/crossref_metadata_2025 huggingface dataset:
Fatigue Life Recovery via Laser Shock Peening in Mechanically Damaged Aluminium Sheet; Experiments and Prediction Models
Authors: Smyth Niall , Irving Philip E.
Published: March 2014

This paper reports the effectiveness of residual stress fields induced by laser shock peening (LSP) to recover pristine fatigue life. Scratches 50 and 150 μm deep with 5 μm root radii were introduced into samples of 2024-T351 aluminium sheet 2 mm thick using a diamond tipped tool. LSP was applied along the scratch in a band 5 mm wide. Residual stress fields induced were measured using incremental hole drilling. Compressive residual stress at the surface was-78 MPa increasing to-204 MPa at a depth of 220 μm. Fatigue tests were performed on peened, unpeened, pristine and scribed samples. Scratches reduced fatigue lives by factors up to 22 and LSP restored 74% of pristine life. Unpeened samples fractured at the scratches however peened samples did not fracture at the scratches but instead on the untreated rear face of the samples. Crack initiation still occurred at the root of the scribes on or close to the first load cycle in both peened and unpeened samples. In peened samples the crack at the root of the scribe did not progress to failure, suggesting that residual stress did not affect initiation behaviour but instead FCGR. A residual stress model is presented to predict crack behaviour in peened samples.
Study on Conductive Polypyrrole/P(Ba-co-Aa)-g-PMMA-GMA Composites
Authors: Zhou Shi Biao , Xiao An Guo , Huang Xiao Bing , Chen Zhen Gan , Chen Yuan Dao , Xing Zhi Fu
Published: March 2014

A novel PPy/P(BA-co-AA)-g-PMMA-GMA (terpolymer) composites were prepared and the preparation conditions, characterization and properties of the composites were investigated. The results indicate that the oxidant types, molar ratio of oxidant/monomer, polymerization time, PPy content affect greatly the conductivity of the PPy/terpolymer composites. The ultimate elongation of composites decreases with increasing PPy content,while high PPMM content brings forth high tensile strength.
Durability Analysis on the Performance of Concrete Construction Based on Reinforcement Corrosion
Authors: Feng Hong Wei , Wu Yi Meng
Published: March 2014

This paper analyzes the whole deterioration process of the concrete structural performance caused by reinforcement corrosion, and given the three setting conditions which are corrosion cracking conditions and collapsed condition, and the corresponding performance function for such structural durability limit state. The relevant content can provide a reference for the design of structural durability and related specifications.
The Application Study Status of Spacecraft Structural Materials
Authors: Gai Ke Rong
Published: March 2014

This paper explained the general performance requirement of astronautic structural material at the first, then introduced the fundamental characteristics and application of widely used astronautic structural material, analyzed on emphasis the application status of the metal materialcomposite materials and thermal protective materials,at the end of the paper, the development demand in the future of astronautic structural material Was pointed out .
UV Curable Polyurethane Dispersions Extended by a New Chain Extender
Authors: Wang Zheng Xiang , Wang Jian Long , Liu Qing Long , Yuan Ji Tong , Chen Hong
Published: March 2014

Ultraviolet (UV) curable waterborne polyurethane dispersions with comb branched structure were synthesized by prepolymer process. C=C bonds were incorporated into the branched chains of the polyurethane using chain extender, hence, the content of C=C bonds can be adjusted by the chain extender consumption. The chemical structure was identified by Fourier transform infrared spectroscopy (FTIR) and 1H NMR. Effects of the chain extender content on the microstructure, rheological behavior, thermal property, mechanical and other properties of the UV cured films were researched.
Cold Extrusion Forming Aluminum Alloy Honeycomb Radiator Mold Structure Optimization
Authors: Qu Sheng Guan , Liu Li Kui , Li Gang , Li Xiaoqiang
Published: March 2014

The quality of the honeycomb radiator structure has a great impact on thermal performance of the LED lamp. In order to make honeycomb radiators structure more uniform and materials fluidity much better; we firstly take use of cold extrusion to form the honeycomb radiator, then it will be machined. In the honeycomb radiator deformation than the larger places where prone to stress concentration, that has a seriously affect on the effect of the radiator forming. Therefore, we optimized the extrusion die, including upper and lower mold prone to stress concentration places create fillet. The results show that an appropriate fillet of the mold can greatly improve the forming uniformity and reduce the force on the die.
Graphene Oxide/Fe3O4 Composites Prepared via In Situ Precipitation
Authors: Yang Zhe Wei , Fan Xin , Guo Li Ang , Wei Wei Ting
Published: March 2014

The graphene oxide/Fe3O4 composites were prepared by in situ precipitation method in this article. The microstructure and surface morphology of composites were characterized by Fourier transform infrared spectrum, X-ray diffraction and scanning electron microscopy, respectively. Cyclic voltammetry was employed for the determination of specific capacitance and other electrochemical performances. It was shown that there was the chemical bonding force between GO and Fe3O4 particles. And the surfaces of GO were wrapped by the Fe3O4 particles precipitated on the surfaces of GO sheets and no impurities were detected. Furthermore, the specific capacitance of GO/Fe3O4 composite electrodes decreased as Fe3O4 particles reduced and the redox peaks became weaker owing to the addition of nonconductive Fe3O4 particles.
Purification of Epothilones A and B with Column Chromatography on a Sephadex LH-20
Authors: Yang Ji Kun , Zhao Lin , Sun Rui Cheng , Shen Yue Mao , Wang Nai Qiang , Liu Xin Li
Published: March 2014

A simplified and efficient method was developed for the large-scale purification of the epothilone A and B from fermentation products of Sorangium cellulosum after organic solvent extraction in this paper. Extractant from XAD-16 resin with tetrachloromethane containing epothilones was concentrated under vacuum, subjected to Sephadex LH-20 column chromatography, and eluted with several solvents. Fractions containing epothilones are pooled, concentrated, and applied to a second cycle of column chromatography with other solvents. Result showed that elution with acetone gave the best purity of epothilones [78.1% by high-performance liquid chromatography (HPLC) than that with pure methanol, pure ethanol, 70% (v/v) aqueous methanol or methanol-dichloromethane (1:1, v/v).] Then, when flow rate was 0.2 mL/min and sample amount (epoA) was 1 mg in second cycle, elution with methanol was resulted in complete separation between epothilone A and B, and further improved separately the purity of epothilone A and B to 90.27% and 77.34%. This simplified purification scheme avoided the loss of expensive epothilones in the common silica gel separation process and achieved the separation of epothilone A and B, significantly reduce the cost of the production without preparative liquid chromatography, or other equipment.
Preparation and Characterization of Epoxy Resin Composite Modified by Flexible Polyurethane Resin
Authors: Cheng Rong , Zhang Cheng , Wang Jing
Published: March 2014

In this paper, under the effect of MD1041 cashew oil modified phenolic amine curing agent for epoxy resin, it successfully prepared polyurethane flexible resin modified epoxy resin composite materials by using polyurethane modified epoxy resin reinforced flexible resin. Modified composite material of the new preparation is characteristed by the method of the mechanical performance test, Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC). The results show that the flexible resin has a strong effect on the toughness of modified epoxy resin composite materials. When the mass ratio of the flexible resin account for 5.9%,comprehensive mechanical properties of the modified composites is at the premium; when the mass ratio of flexible resin account for 3.1%, the thermal stability of the epoxy resin modified with flexible resin is at the best.
Numerical Simulation of Filling for 7075 Alloy and TiB2/7075 Composites Wheel Prepared by Low Pressure Die Casting
Authors: Gao Qian , Yang Bin , Gan Gui Sheng , Wu Huan Chun
Published: March 2014

Based on the experimental and calculation results between the reinforcing particles content and thermal physical parameters, low pressure die casting of wheels was taken as an example to study the casting property of the 7075 alloy and TiB2/7075 composites. The influences of die temperature, pouring pressure, pouring temperature and TiB2 content on the filling of 7075 alloy and TiB2/7075 composites wheels are studied by numerical simulation. Shrinkage porosity appears both in the spoke and rim of the wheel. The shrinkage porosity of the 7075 alloy decreases from 2.089% to 1.622% with mold temperature increasing from 100°C to 400°C. The shrinkage porosity of wheel decreases from 1.630% to 1.598% and 1.583% in the composite with 3 and 6wt.% TiB2 particles. Besides, shrinkage porosities decrease with increasing pouring temperature.
Inhibition of Grain Coarsening in Nanocrystalline Fe-C Alloys by Interaction between Carbon and Grain Boundaries
Authors: Chen Yu Zeng , Herz A. , Borchers Christine , Shi X.H. , Ma X.Y. , Liu F. , Kirchheim Reiner
Published: March 2014

Nanocrystalline Fe-1.77at.%C and Fe-3.27at.%C alloys prepared by ball milling iron powders and graphite powders are annealed below 573K where the precipitation of Fe3C does not occur. Upon annealing, a significant grain coarsening is observed in Fe-1.77at.%C alloy, whereas the grain coarsening is inhibited in Fe-3.27at.%C alloy. Within the framework of thermodynamic theories, the inhibition of grain coarsening in nanocrystalline Fe-C alloys is discussed. It is demonstrated that the inhibition of grain coarsening in the nanocrystalline Fe-C alloys can be ascribed to a vanished driving force for grain growth which is caused by the interaction between carbon and the grain boundaries of nanograins.
Permeability of Packaging Materials
Authors: Zhang Sheng , Gu Wen Chao , Cheng Zheng Yong , Gu Wen Juan , Li Ying
Published: March 2014

The harmful ingredients in packaging materials and containers usually migrate to food during the machining and printing period. The permeability of packaging materials is very important for the food packaging safety. Several commonly used packaging materials were researched in this paper. Their permeability was characterized including the gas permeability, light-transmitting property, and the water vapor permeability. Some technologies which could improve the barrier property were brought forward. And the factors that impact the permeability were discussed in this research. Research on the permeability of packaging material is significant for food industry.
Studies on the Effectes of XC Functionals and Basis Sets on the Geometrical Structures, Absorption and Emission Spectra of a 1,8-naphthalimide Derivative
Authors: Hu Yuan Fang , Nie Guang Hua
Published: March 2014

N-Hexyl-4-(thiophen-2-yl)-1,8-naphthalimide (HTNI) is one of the 1,8-naphthalimide derivatives with excellent fluorescence property. A scheme of time-dependent density functional theory (TDDFT) and configuration interaction singles (CIS) approach in conjunction with polarizable continuum models (PCMs) are employed to make a detailed investigation of the emitting energy. The transition energies of absorption and emission are computed using five exchange-correlation (XC) functionals, B3LYP, PBE0, M06, CAM-B3LYP, and wB97XD as well as 6-31G* and 6-31+G* basis sets. The results show that the predicted emitting energies as well as the absorption ones are dominated mainly by XC functional to be used. By comparing the calculated electron transition energies to experimental observations, it is found that PBE0 functional in combination with 6-31G* basis set is the best method to reproduce the experimental spectra of HTNI.
The Interactions and Fire Extinguishing Mechanism of Inorganic Agent Complex
Authors: Zhang Xiang , Yin Chao Lu , Li Ping Li , Zhang Fan
Published: March 2014

An inorganic salt complex which had a strong ability to generate lot of inert gases rapidly in a fire was prepared. Fire extinguishing agent added with sodium tungstate as a synergist had a great performance in gas release. Flammable gas and oxygen in fire could be diluted by Carbon dioxide and ammonium which released from the heating of inorganic salt complex.
Study on the Preparation and Adsorption Properties of Activated Carbon Obtained from Chinese Herbal Medicine Residue
Authors: Ming Li , Xia Wei , Dong Bo , Mao Jun Hua , Zhoug Xin Wen , Pan Jia Rong
Published: March 2014

In this paper, we use residue of ten different Chinese herbal medicine as raw material and ZnCl2, KOH,K2CO3 as activator, using chemical activation method to prepare activated carbon, and we do performance testing on the activated carbon. The experimental process includes the preparation and properties testing of activated carbon, as well as testing the content of leading components of lignin in these Chinese herbal medicine raw materials and their calorific values. We've studied the relationship between leading components of these raw materials and out put and properties of the activated carbon. As a result, we got that using KOH and K2CO3 as activator to prepare activated carbon is a good choose for residue of Chinese herbal medicine belonging to rootstock which contains high content of lignin.And ZnCl2 for residue of Chinese herbal medicine belonging to cane.
Research on Rolling about Copper/Aluminum/Stainless Steel Three-Ply Clad Sheet
Authors: Sun Lie , Pang Yu Hua , Gao Lei , Tian Da Rong
Published: March 2014

This paper studies the copper/aluminum/stainless steel (Cu/Al/STS) three-ply clad sheet rolling process. Cu/Al/STS clad sheet rolling process and mechanical properties were investigated , the results shows that with the increase of rolling reduction rate, the tensile strength of the clad sheet increasing and the cupping value decreasing, when the reduction rate is 33.3% ,clad elongation can be up to 72.2% and tensile strength up to 336MPa.The cupping test of the clad sheet is larger when the ply of STS is in the inner side of the cup than the ply of Cu in it. The best rolling process for Cu/Al/STS three-ply clad sheet is six-ply symmetric combination, heating temperature 350 ° C, heating time 5 ~ 10mins and rolling reduction rate is 33.3%.
The Effect of Hard Milling on Surface Finish of Medium Carbon Steel
Authors: Chutrakul Phasit , Jirapattarasilp Komson
Published: March 2014

This research was to study the effect of hard milling on the surface finish of medium carbon steel. The sample specimen was selected to AISI 1050. The vertical milling process was chosen to experiment, which used insert PVD carbide tool. The experiment was applied on factors: cutting speed, depth of cut and feed rate and they were consisted of three levels. The factorial design on 33 experiments was applied. The surface roughness average (Ra) was indicated for surface finish. The experiment results were analyzed by ANOVA. The main factors and factors interaction that affected to surface finish were investigated. Effect of cutting speed, feed rate and depth of cut on surface finish of harden medium carbon steel was discussed.
Structural-Phase Transformations in R6m5 Steel while Electrolytic-Plasma Processing
Authors: Skakov Маzhyn , Batyrbekov Erlan , Rakhadilov Bauyrzhan , Scheffler Michael
Published: March 2014

The article examines regularities of high-speed steel surface changes in the phase and structural states of during the electrolytic-plasma processing. It is determined that after modification by electrolytic-plasma influence on the surface of R6M5 high-speed steel formation of small pores, microdefects and fine inclusion. Surface modified layer consists of nitrogen austenite, nitrogen martensite and fine nitride particles.
The Effect of Li-Al Alloy on Combustion Performance of B/PTFE Fuel-Rich Propellant
Authors: Liu Ting , Chen Xin , Xu Hui Xiang , Wei Yong Qi , Han Ai Jun , Ye Ming Quan , Pan Gong Pei
Published: March 2014

In order to increase the ignition performance and combustion performance of B/PTFE fuel-rich propellant,Li-Al alloy is used to increase the sensitivity of B/PTFE fuel-rich propellant.The impact sensitivity、friction sensitivity、 combustion temperature、 burning rate combustion heat and TGA are tested.The results showed that the sensitivity、combustion heat and ignition performance increase much.The burning rate increased 30~50% and the combustion temperature was relatively stable about 800°C.
The Effects of Tensile Softening Curve Parameters on Fracture in Concrete Based on Initial Fracture Toughness Criterion
Authors: Qing Long Bang , Liu Huan Huan
Published: March 2014

The effects of tensile softening curve parameters on the crack propagation P-CMOD and P-CTOD curves were analyzed using a calculation method which adopted the initial fracture toughness as the crack propagation criterion. The results showed that: the whole process of the P-CMOD and P-CTOD curves were affected by the tensile softening curve parameters, especially for the descending segment of the curves, but the peak load and critical crack mouth opening displacement were less affected.
Dynamic Rupture Analysis of Concrete Structures by FEM-DEM Method
Authors: Qiu Liu Chao
Published: March 2014

A FEM-DEM approach was applied to investigate progressive rupture of concrete structures due to dynamic load including earthquakes. In the proposed method, the finite element method (FEM) designed for modelling stressed and deformed solids has been combined with the motion tracking capability of discrete element method (DEM). A fracture model combining single and smeared crack model is used in our simulation. The FEM-DEM method was used to simulate both the intact concrete behavior and the development of fractures in the indirect tensile test. The simulation results identify the failure mechanisms and validate the nature of tensile crack initiation and propagation in concrete disk. In particular, a comprehensive study on the seismic rupture of the Koyna dam during earthquakes is performed using the proposed method. It is shown that the proposed method can predicate the formation and propagation of cracks in concrete dam due to earthquakes.
Saporin Conjugated with Transforming Growth Factor-α Inhibit Neointimal Proliferation by Specific Cytotoxicity
Authors: Yang Jun , Luo Jian , Biao Deng , Wang Shu Yan , Ding Sai Liang , Wu Zhi Xiong
Published: March 2014

Objective This study aimed to investigate the Cytotoxic effects of TGFα-SAP on the inhibition of neointimal proliferation after rat common carotid arterial injury. Methods seventy rats were divided into two groups. The TGFα-SAP treated group was treated with local injection of TGFα-SAP (5μg/kg) after injury, and the control group was treated with saline. Rat arterial segment was investigated at 1, 3, 9, and 28 days after operation. Results Compared to the control group, the TGFα-SAP treated group shows a significant inhibition of intimal thickness. Conclusion The results indicated that TGFα-SAP can effectively inhibit neointimal proliferation following arterial injury .
Preparation and Microstructural Properties of Gallium Doped Zinc Oxide Thin Films for Organic Solar Cells
Authors: Lan C. , Wang H. , Zhong Z.Y. , Zhang T. , Yang C.Y. , Hou J.
Published: March 2014

Transparent conducting gallium doped zinc oxide (GaZnO) films were prepared by magnetron sputtering technique. The influence of growth temperature on the microstructural and optical properties of the films were investigated by means of X-ray diffraction (XRD), spectrophotometer and optical characterization method, respectively. The results show that all the samples are polycrystalline in nature having a hexagonal wurtzite type crystal structure with a preferred grain orientation in the (002) direction. The growth temperature significantly affects the crystal structure and optical properties of the samples. The film deposited at the growth temperature of 670 K possesses the largest grain grain, the minimum dislocation density and the lowest microstrain. The average visible transmittance and optical energy gap of the samples increase gradually with the increment of growth temperature.
Study of Single-Phase CIP Acidic Cleaning Agent Detergency
Authors: Zeng Xian Zhou , Duan Jia Gui , Ma Jie
Published: March 2014

Through the analysis on the type of deposition of dirt which is produced from the beer, beverage and dairy production devices. And through the discussion on physicochemical analysis and the principle of cleaning, the test of inorganic dirt cleaning and organic dirt cleaning was conducted. The formula for cleaning was optimized at the same time. From the results of the test, it suggested that it is possible for the single-phase CIP acidic cleaning agent and the developed CIP cleaning process to replace the traditional five-step CIP cleaning process.
The Application of PDLLA/β-TCP Conduits for Repair of Injured Sciatic Nerve
Authors: Xie Li Juan , Qiu Tong
Published: March 2014

Transection is one of the most severe injuries in the peripheral nerve. In present study, novel PDLLA/β-TCP conduits for repair of injured sciatic nerve were applied. We firstly introduced the nanoβ-TCP particles into the conduits. The results demonstrated that β-TCP decomposition improved the acid environment from degradation of PDLLA and elevated the local calcium ion content. And the local Ca2+ influx promoted the BDNF synthesis and secretion, which is beneficial for the nerve regeneration. All in all, PDLLA/β-TCP composite facilitate the sciatic regeneration through modifying the microenvironment in the conduits.
A Method Optimizing the Forging Process of Titanium Alloy Blisk Based on the Processing Map
Authors: Yang Yan Hui , Liu Dong , Gao Guo Jie , Wang Jian Guo
Published: March 2014

Isothermal compression tests were conducted at various temperature and strain rate combinations over the hot working range (880 to 1040°C and 0.01 to 10.0 s-1) of TC11 alloy. Based on the experimental data, the strain rate sensitivity factors m were calculated. Both the efficiency of power dissipation and the instability parameter were computed, and then processing maps incorporated instability maps were accordingly established at strains of 0.1, 0.3 and 0.6. A method to optimize the forging process of Titanium alloy blisk was proposed based on the processing map. The optimized process of TC11 alloy blisk was achieved using the proposed method and was verified by numerical simulation and experiment. The results showed that this optimal process is applicable to produce blisk with duplex structures.
Energy Loss Analysis of Flared Cuff for Branched Endovascular Graft Application
Authors: Jia Hao , Li Chao Jing , Wang Fu Jun , Wang Lu , Mao Ying , Chen Pei Feng , Guo Jian Sheng
Published: March 2014

Flared cuff for branched stent-graft application remains a longstanding challenge in endovascular graft exclusion. Introducing various kinds of function to describe the curved surface of flared cuff has shown significances. The method based on the energy loss formula of fluid mechanics is used to minimize energy dissipation of each model representing different functions. Among the five models that are created in experiment, the performance of arc model is relatively more excellent. The energy loss analysis has a certain guiding on morphology optimization of branched graft.
Application of PEM and OBIRCH to Defect Localization of Integrated Circuits
Authors: Lian Jian Wen , Lin Xiao Ling , Yao Ruo He
Published: March 2014

With the increasing integration and complexity of microelectronic devices, fault isolation has been challenged. Photon Emission Microscopy (PEM) and Optical Beam Induced Resistance Change (OBIRCH) are effective tools for defect localization and fault characterization in failure analysis. In this paper, the principles and different application condition of PEM and OBIRCH are discussed. PEM is very helpful for locating defects emitting photon, but can not detect the defects which have no photon emitting, such as shorted metal interconnects; OBIRCH as a complementary, has a high success rate for locating resistance defects. Two cases with failure mechanisms illuminated are presented to show the different application of PEM and OBIRCH.
Test Study of Fracture Mechanical Properties of Reactive Powder Concrete with Additives
Authors: Yin Zhi Gang
Published: March 2014

The different influencing regular of fly-ash fractiontype of fibre (steel fibre and polypropylene fibre) and fibre fraction on the mechanical property and fracture behavior of Reactive Powder Concrete (PRC) are studied. Fracture mechanical properties of RPC is researched in double-K fracture model and fracture energy release rate G . Test results show that the crack propagation of RPC with steel fibers is limited. Its fracture toughness and pre-critical crack length is largely enhanced. Double-K fracture model and fracture energy release rate G are consistent with describing the fracture behavior of RPC.
Structure and Motion Analysis of Robotic Arm Based on SolidWorks and Arduino
Authors: Lu Guang Yue , Wu Tao
Published: March 2014

This paper discusses a robotic arm which is driven by servo device. Arduino hardware and program is used to control its motion. It can complete an action that extracts an object from a place to another. It is available for handling material in production line, machine loading and unloading work in practical application. SolidWorks is also used to model and analyze its motion.
Study on Friction Characteristics of Energizing Pneumatic Cylinders
Authors: Zhan Yan Jia , Wang Tao , Wang Bo
Published: March 2014

As a special kind of pneumatic cylinder, energizing pneumatic cylinder can increase the output force without changing diameter by a series of two or more piston on a piston rod. Since the friction characteristics of pneumatic cylinders is one of the most important factors affecting the nonlinearity, a new experimental apparatus is designed to have an in-depth study, base on exhaust throttle. The friction of energizing pneumatic cylinder was tested under different working pressure and velocity to ascertain the parameters of stribeck model. The results show that friction model of the energizing pneumatic cylinder can be the superposition of the models of each piston.
Matching Optimization of Impeller and Volute for Double-Channel with Double-Suction Pump
Authors: Luo Bao Jie , Song Lin Long , Zhao Pan
Published: March 2014

In order to study the matching optimization of the impeller and volute as well as the flow characteristics of double-channel with double-suction pump ,this paper based on CFD performance prediction method uses the same impeller to match the volute with different base diameters, guaranteeing the volute inlet width, flow cross-sectional area, and tongue position unchanged .The calculation results show that scheme A with the largest volute base diameter can not only achieve the excellent energy characteristics and the velocity-pressure uniform distributions, but also the exchange of the fluid energy is more sufficient in the volute. On one hand, a large clearance can not only make the movement interference intensity weaken between the impeller and volute, but also can decrease the high frequency components of the pressure pulsations .On the other hand, the big gap can maximum exert the pump effects to convey liquids containing solid suspended particles as well as the fibrous suspended matters. The research can not only provide some references to further study on matching optimization of the impeller and volute but also can contribute to the hydraulic design of the impeller and volute.
Simulation of Taper Roll Deviation Rectification Ability in Continuous Annealing Furnace
Authors: Shao Jian , He An Rui , Sun Wen Quan
Published: March 2014

Running deviation of cold strip affects smooth operation in continuous annealing furnace, and the taper roll technology has positive significance for the prevention of strip deviation. In this paper, a finite element model of cold strip in continuous annealing furnace is established, and it can be used to analysis deviation rectification ability of single taper roll with different conical height and straight section length, double taper roll with different total conical height, straight section length and taper ratio. The calculation results show that the conical height is the most important factor for deviation rectification, and the deviation rectification ability of double taper roll is better than single taper roll. The results provide reference for taper roll optimization design in continuous annealing furnace.
An Improved Joint Target Tracking and Classification Algorithm Based on Data Fusion
Authors: Quan Hong Wei , Chen Lin , Peng Dong Liang
Published: March 2014

This paper addresses the problem of the joint target tracking and classification based on data fusion. In traditional methods, a separate suite of sensors and system models are used, target tracking and target classification are usually treated as separate problems. In our JTC framework, the link between target state and class is considered and the feasibility of JTC techniques is discussed. The tracking accuracy and classification probability are improved to some extent with the more accurate classification results from classifier based on data fusion feedback to state filter.
Synthesis of CaAlSiN3:Eu2+ Phosphor via the Self-Propagating High Temperature Synthesis Method and its Optical Properties
Authors: Chung Shyan Lung , Huang Shu Chi
Published: March 2014

A combustion synthesis method has been developed for synthesis of Eu2+ doped CaAlSiN3:Eu2+ phosphor and its photoluminescence properties were investigated. Ca, Al, Si, and Eu2O3 powders were used as the Ca,Al,Si,and Eu sources. NaN3 and NH4Cl were found necessary to be added for the formation of the product phase and addition of Si3N4 was found to enhance the product yield. These powders were mixed and pressed into a compact which was then wrapped up with an igniting agent (Mg+Fe3O4). The reactant compact was ignited by electrical heating under a N2 pressure of 0.8 MPa. The synthesized CaAlSiN3:Eu2+ phosphor absorbs light in the region of 240-520 nm and shows a broad band emission in the region of 500-800 nm due to the 4f65d14f7 transition of Eu2+.The synthesized phosphor thus has a potential application as a red phosphor for white LED lighting.
Comparison of the Two Methods to Determine State Parameters of Wet Saturated Steam
Authors: Wang Ya Rong , Wang Pei Rong
Published: March 2014

Water steam is widely used in steam turbines, steam engines, nuclear power plants and many other places. As a kind of working medium, it has many advantages, such as proper thermodynamic properties, non-toxic, odorless ,cheap, and so on. So it is very important how to determine the state parameters of water steam. In this paper we describe the two methods to determine state parameters of wet saturated steam, and the two methods are compared.
Dynamic Sliding Mode Control of Parallel Robot Based on AC Servo-Motor Drive
Authors: Zhu Cai Hong , Sun Hong
Published: March 2014

Parallel robot possesses the characteristics of large rigidity, strong load bearing capacity and small error. Directed against the parallel robot mechanism with AC servo-motor driveparallel mechanism, a model of controlling system was established, and a track planning in its working space has been carried out. After that a kind of dynamic sliding mode control algorithm was designed, and a simulative experiment was made on the Matlab/Simulink. The result shows that this algorithm is good in the system, and achieved high precision real-time control on this parallel robot.
The Preparation and Performance Analysis of Metal Winding Gasket
Authors: Zhang Meng , Liu Mei Hong , Li Yu Xian
Published: March 2014

The structure, material, production and application situation of metal winding gasket were summarized, and the preparation technology and product properties of metal winding gasket were analyzed. The results showed: under the same gasket stress, the leakage rate increased with the increase of medium pressure; Under the same medium pressure, the leakage rate declined with the increase of the gasket stress. By comparing with the performance of traditional asbestos winding gasket, the new metal winding gaskets performance has reached the requirement of asbestos winding gasket and can replace asbestos winding gasket.
Parametric Design of Static Tube for Long-Distance Outboard Precision Atmospheric Static Pressure Measurement
Authors: Liu Du Xi , Zhang Sen , Zhu Yun Long , Qin Qiu Xia
Published: March 2014

Trailing cone method is generally used for atmospheric pressure measurement among airspeed calibration, of which the accuracy is not high enough and the hysteresis error exists. So a long-distance outboard precision airspeed calibration method is put forward. This paper focuses on the study on parametric design of static tube which is the sensing element of the newmethod. The flow field of the static tube is simulated and analyzed to get position error curve in flight test environment by using Computational Fluid Dynamics (CFD) technology. Based on the simulation result and considering the impact of front and rear connectors, the main geometric paramters of static tube is determined and optimized. The calculation result indicates that, pressure coefficient Cp of the static tube is less than 0.0198.
Application of Multi-Objective Optimization Algorithm Based on Physical Programming in Ship Conceptual Design
Authors: Hao Zhai Liu , Liu Zu Yuan , Feng Bai Wei
Published: March 2014

Ship optimization design is a typical multi-objective problem. The multi-objective optimization algorithm based on physical programming is able to obtain evenly distributed Pareto front. But the number of Pareto solutions and the search positions of pseudo-preference structures still exit some disadvantages that are improved in this paper. Firstly uniform design for mixture experiments is used to arbitrarily set the number of Pareto solutions and evenly distribute the search positions of pseudo-preference structures. Then the objective space is searched by shrinking of search domain and rotation of pseudo-preference structure technology. The optimization quality is able to be improved. Finally, the improved multi-objective optimization algorithm is applied to ship conceptual design optimization and compared with the multi-objective evolutionary algorithm to verify the effectiveness of the improved algorithm.
Influence of Predeformation Temperature on Recovery Performance of Ni47Ti44Nb9 Alloy Φ16mm Pipe Joint
Authors: Li Gui Fa , Lu Shi Qiang , Wang Ke Lu , Liu Jun Wei , Wang Er Min
Published: March 2014

Using the method of expanding diameter in low temperature and water bath heating, this paper studied the effect of pre-deformation temperature on shape memory recovery characteristics of Ni47Ti44Nb9 alloy Φ16 mm pipe joint. The results showed that the transformation hysteresis and the radial recoverable strain were relative stable along with the addition of pre-deformation temperature, which were 122°C±4°C and 7.1%±0.3% respectively. Moreover the radial recovery rate of inner diameter declined smoothly with the addition of pre-deformation temperature. Systems considering the three parameters of transformation hysteresis, recoverable strain and strain recovery rate, it seemed the excellent predeformed temperature for Ni47Ti44Nb9 alloy Φ16 mm pipe joint was in-65~-70°C.
Research on Conceptual Design of Green Electromechanical Products
Authors: Lou Xi Yin
Published: March 2014

The concept design of green products is according to the various phases of the product life cycle, product function to create and functional decomposition, to meet the principle of solving functional requirements and Realization of the idea and the system design principle of vector scheme of function structure. The conceptual design process is a process of divergent thinking and innovative design, the optimal process plan. Therefore, the conceptual design stage is a very innovative design stage, is also the green design is the most important stage.
Application of Planetary Gear Transmission Technology in Tracked Combine Harvester
Authors: Lou Xi Yin
Published: March 2014

The tracked combine agricultural machinery is a most complex in structure, high technology content, the manufacture technology of very strict requirements of product. Our crawlers combine 1/3 of the fault from the walking gear system in operation. This paper adopts the planetary wheel transmission, because it has the advantages of compact structure, small volume, large transmission ratio, torque / volume ratio, high efficiency, and high reliability, meet the structure and characteristics of the combine harvester. This technology can save the transmission assembly, avoid the fault of gearbox assembly; improve the combine harvester of paddy field through.
Keywords: Mechanical design;Combine Harvester;Planetary Gear;Transmission Technology
Design of Measurement System for Underwater Vehicle Based on NAH
Authors: Ji Qing , Jiang Pei
Published: March 2014

How to locate accurately positioning of underwater noise source is the most important link of underwater vehicle fault detection and diagnosis. In this paper, Near-field Acoustic Holography technique is applied to detection and location of noise sources of underwater vehicle, to collect radiated noise information of noise source. A LABVIEW-based underwater vehicle sound pressure measurement system is designed, which has capacity to detect and locate noise sources of the underwater vehicle, so that the fault positioning of underwater target can be located and excluded easily.
Design of Injection Mould with the Curved Surface and Core-Pulling
Authors: Shang Xin Juan
Published: March 2014

This paper analyzes the structure of plastic parts of the mold national occupation colleges skills competition in 2012. The mold structure was designed, and 2D assembly drawings was drew. The curved surface of the mold parting, core-pulling and key technology of submarine gate was analyzed. The mold was compacted in structure, meeting the requirement of product technology.
The Design and Application of the Curved Plate Adjust Tooling of PROTOS Cigarette Machine
Authors: Liao Yan Pei , Li Wei Cai , Zheng Zhong Hua , Fei Cheng Cheng
Published: March 2014

If the gap between the curved plate and throw cut tobacco roller of the throwing tobacco agency in PROTOS cigarette machine is improperly adjusted, easily lead to the curved plate wear faster, tobacco-made pieces increases, short cigarettes increased. However, there is no a adjust tooling for the curved plate. To solve this problem, a new type of curved plate adjust tooling is designed. The three movable reference wheels used to test and adjust the gap instead of the reference plane. The application results show that the new tooling is an effective solution to solve the installation and adjustment problems of the curved plate. The installation and adjustment of working hours decreased from 2.5 hours to 1.5 hours. It also ensures the curved plate mounting quality and precision requirements and reduces tobacco-made pieces rate and cigarettes short rate.
Influence Analysis of Hull Deformation on Dynamic Behavior of Propulsion Shafting
Authors: An Feng Bao , Yang Ping , Yan Xin Ping , Li Ming
Published: March 2014

The aim of this paper is to study the influence of hull deformation on dynamic behavior of ship propulsion shafting. Taking an 8530TEU container ship as an objective and using the finite element method, a global ship structure model is built up to evaluate the hull deformations under typical loading cases. Then the hull bottom-propulsion shafting integrated model is adopted to analyze the effect of hull deformation on shafting natural frequency under dry and wet mode. The results show that the natural frequencies of the shafting will increase due to the effect of hull deformation. Consequently, it is necessary to consider the effect of ship deformation when dealing with the dynamic behavior of ship propulsion shafting.
Double Impulses Extraction of Faulty Rolling Element Bearing Based on EEMD and Complex Morlet Wavelet
Authors: Kong You Bing , Guo Yu , Wu Xing
Published: March 2014

A method for the double impulses extraction of faulty rolling element bearing (REB) is proposed in this paper. In the proposed approach, the (Ensemble Empirical Mode Decomposition) EEMD are employed for filtering the random noise and high-frequency continuous noise without any mode mixing. Then, the extracted signal is filtered with complex Morlet wavelet, which enhanced the double impulses greatly. As a result, clear double impulses can be obtained through the envelope. The effectiveness of the approach is demonstrated by the simulation study.
A Study on the Mechanical Properties of Disc Spring Vibration Isolator with Viscous Dampers
Authors: Jia Fang , Zhang Fan Cheng
Published: March 2014

In present study, the mechanical properties of disc-spring vibration isolator with viscous dampers is investigated by finite element analysis (FEA) and experiments. The result of FEA and static test reveals that frictional damping has significant effect on the static stiffness of combination vibration isolator, the ability to strengthen loading stiffness and lower unloading stiffness. However viscous damper has no effect on the static mechanical properties. The dynamic experiment shows that the dynamic performance of combination vibration isolator can be greatly improved with viscous dampers. Viscous dampers have little effect on dynamic stiffness of vibration isolator, but significant effect on damping characteristics. These conclusions are of significant importance in the analysis and design of combination disc-spring vibration isolators.
Study on the Effect of Calender on Coating surface structure and Printability of Coated Paper
Authors: Li Jian Guo , Li Ying
Published: March 2014

The structure of the coating layer has a strong influence on the optical and physical properties of paper as well as on the print quality. Ink is transferred and sets onto the paper surface in the printing process, which affect printing quality and usage of ink. The objective of this experiment was to investigate the influence of calender on coating surface structure and Printability. The surface structure was explored in the method of numerical and visual analysis using mercury porosimetry measurement and scanning electron microscopy (SEM). The findings indicated that the calender treatment affected the pore size, depth and distribution of the coated paper surface. It could be concluded that Calender could increase the smoothness, gloss and paper surface efficiency of coated paper, which resulted in lower amount of ink usage, lower amount of ink absorption and higher print density.
Research on Load-Bearing Performance of I-Shaped Column under Cyclic Compression
Authors: Chen Xiao Jing , Yang Ping , Cui Hu Wei
Published: March 2014

This paper presents a theoretical method to analyze the load bearing capability under cyclic axial compression load. The relationship between axial force and vertical deflection of I-shaped column is obtained by theoretical analysis and derivation. To verify the method and formulas of the paper, an illustrative example column is analyzed by the presented theoretical method and FEM to discuss the deflection performance and load bearing capability. The comparison of the results indicates perfect match between theoretical and numerical ones. It is shown that the theoretical analysis is feasible and reasonable.
The Numerical Simulation of Punching and the Fatigue Analysis of Punch Based on ANSYS/LS-DYNA and ANSYS-Fatigue Tool
Authors: Li Wei Min , Yan Yang Yang , Xing Ying
Published: March 2014

In allusion to the characteristic of stamping moulds fatigue analysis, the nodal stress result is obtained by the numerical simulation of punching with the explicit dynamic software called ANSYS/LS-DYNA. Then the fatigue life of punch about the different surface treatments is calculated by ANSYS-Fatigue tool. Through this way an effective method that is suitable for the calculation and reasonable improvement of stamping moulds fatigue life is obtained.
Analysis of a Material Life Model
Authors: Huang Chao , Yan Guo Yi
Published: March 2014

Survival analysis , can be used to estimate the durability life of the material structure. In this paper, we study a general class of additive-multiplicative model with accelerated hazard factor for survival data. This general class model includes some popular classes of models as subclasses, and may provide a tool to choose model more appropriate for a given data set. Finally, a parameter estimation of the material life model is obtained.
Product Manufacturing Technology Based on Virtual Reality Modeling Language
Authors: Lou Xi Yin
Published: March 2014

Virtual reality modeling language (VRML) system is a new type of human-computer interaction system. it also is the development direction of modern mechanical design. This paper expounds the characteristics of VRML, presents the key technology of VRML from the mechanical product development mode, and it probes into the VRML research direction.
Key Words:Mechanical design; Virtual manufacturing; Technology; Virtual reality modeling
Analysis of Microvibration of a Microelectronics Workshop under Multipoint Excitation
Authors: Lei Zi Xue , Ma Qiao Zheng , Qiu Teng Jiao
Published: March 2014

This paper simulated the microvibration response of a micro-electronic workshop by using the finite element analysis software Sap2000. Based on the measured vibration signals as input data at the base, the displacement and velocity curves at some typical points on the work platform of a micro-electronic workshop under uniform and multipoint excitation were obtained. The results show that displacement responses at nodes of beams or in the direction of lower stiffness under multipoint excitation are much greater than those under uniform excitation, while there are no marked difference in the peak values of velocities.
Study on Control of the Cam Contour to Pressure Angle Base on MATLAB Modeling
Authors: Liu Zhi Lin
Published: March 2014

In this paper, the mathematical model of eccentric follower cam contour and pressure angle was obtained from theoretical calculation, formulated the program diagram, and used MATLAB programming to realize the theoretical calculation. Through the analysis to influence of the base circle radius, eccentricity and lift angle to the maximum pressure angle of cam, proving that the maximum pressure angle could be controlled by the method of cam contour modeling based on MATLAB programming, and this method could realize the precise control to the maximum angle.
Magnet Field Finite Element Analysis of Permanent Magnet Brushless DC Motors Based on ANSOFT
Authors: Zhu Cai Hong , Zhang Hong Tao
Published: March 2014

2D whole field finite element method (FEM) based on ANSOFT software was adapted, and the magnetic field distribution of permanent-magnet brushless DC motor (BLDC) were calculated. The above discussion can provide reliable theory foundation for the reasonable establishment of nonlinear model BLDC and the further exploitation and application.
Analysis on Freezing Progress of Underground Frost Wall
Authors: Zhao Da Jun , Fang Xin , Zhao Yan
Published: March 2014

To optimize the operation parameters, the comparative analysis was used by means of the finite element analysis software ALGOR．In addition, equivalent specific heat and equivalent thermal conductivity were used during frozen. The conclusions were as follows: First of all, the higher velocity was, the bigger convective heat transfer coefficient will be ;What′s more, the convective heat transfer coefficient of the salt solution was 2 times bigger than the glycol solution；Last but the most important thing was that it was the best effect heat transfer that not only the medium was salt solution, but also the velocity was 0.57m/s. The result of experiment was consistent with the results of the simulations after field test.