bluuebunny/crossref_metadata_2025 huggingface dataset:
Tensile Behavior of Textile Reinforced Flexible Composites with Single Edge Notch (SEN) under Static Solicitation
Authors: Wang Ze Xing , Jiang Jin Hua , Chen Nan Liang
Published: August 2011

For industrial applications, many of the damage of textile reinforced flexible composites are due to growth of the defects coming from manufacturing process or generation by static or dynamic load prior to failure. Hence, this work attempt to investigate on tensile behavior and damage initiation mechanisms in woven fabric reinforced flexible composite with single edge notch (SEN) subjected to mono-axial loading. Tensile tests were conducted with a notch depth of 0, 5, 10, 15 and 20mm, respectively. Damage mechanisms have been described and tensile strength, energy absorption was also expressed. Experimental results indicate that the failure progressive in the textile reinforced flexible composite was quite complex and tested material demonstrated significant notch sensitivity.
The Progress in Research on Silk Fibroin Blend Membranes
Authors: Xu Xiao Xu , Yu Yong Peng , Yang Li Qun
Published: August 2011

Silk fibroin film, which has good biological compatibility, is suitable for use as biomaterials and medical materials. However, silk fibroin film in dry state is too brittle to be used by itself. Blending with other natural or synthetic polymers could improve the poor mechanical properties of silk fibroin film. In this paper, recent researches in blend film of silk fibroin and their application were summarized.
Surface Modification for Cotton Fiber and its Antimicrobial Characteristics
Authors: Zhou Fei , Zheng Jing
Published: August 2011

Quaternary ammonium compounds, Couple, Cotton fiber, Antibacterial activity. Abstract. a gemini-type quaternary ammonium compound with a hydroxyl group in their spacer chain, 4,5-bis(dodecyl dimethyl ammonium bromide)-1-pentanol (called as DAP12), was immobilized on the surface of cotton fiber by using a silane coupler, tetraethoxysilane and a novel antibacterial cotton fiber (called as CF12) was prepared. Antibacterial characteristics of CF12 were investigated comparatively with [3-(trimethoxysilyl) propyl] octadecyldimethylammonium chloride(TPOAC), a mono-type quaternary ammonium salt. CF12 had excellent antibacterial characteristics in the wide range of environmental pH and temperature, which is not weakened even if 30 times repetitive use. The experimental results indicated also that CF12 has higher antimicrobial activity than TPOAC immobilized on the surface of cotton fiber against a broad range of microorganisms, and average inhibition ratio against 15 strains of gram-negative, gram-positive bacteria and yeasts is 99.0% at 30 °C and pH 6.0.
Enhanced Photoelectrocatalytic Degradation of Azo-Dye Pollutants Using Transparent Titania Nanotube Arrays Glass Electrode
Authors: Bai Jing , Zhou Bao Xue , Li Jin Hua , Cai Wei Min
Published: August 2011

Transparent and highly ordered titania nanotube arrays (TNAs) film electrode was synthesized by anodization from the sputtered titanium (Ti) film on a conductive glass and then applied in the degradation of Acid-orange 7 (AO7) model wastewater. The resulting nanotubes have a length of ~900nm and a pore diameter of ~80nm, resting upon a thin barrier layer. Using 20mg L-1 AO7 solutions as a model system, the removal rate of AO7 by the TNAs glass electrode reaches 95.9% within 180min for the fixed bias potential, higher than 86.2% removal by the TNAs metal electrode under the same treatment conditions.
Synthesis and Characterization of New Functional Material (C6H5CNH2nNH3)2PbI4(where n=0,1,2)
Authors: Guo Li Ling , Li Xing , Liu Han Xing
Published: August 2011

The new functional material, the hybrids with molecular formula (C6H5CNH2nNH3)2PbI4(where N=0,1,2) were synthesized by reactions in solution. The influences of the reactant ratio and the reaction time on the structures of the products were investigated. The structures and the properties of the hybrids were characterized using X-ray diffraction(XRD), scanning electron microscopy (SEM) and ultraviolet&visible (UV) adsorption spectra . The effect of number of methylene, n, on the structure forming and the band gap magnitude has been studied. The results demenstrate that the number of methylene has effect both on the forming of the layered structure and on the magnitude of the band gap.
Cone Calorimeter Analysis on the Fire-Resistant Properties of FRW Fire-Retardant Particleboard
Authors: Liu Ying Tao
Published: August 2011

The fire-resistant properties of FRW fire-retardant particleboard and untreated particleboard had been measured under a heat flux of 75 kW/m2 by cone calorimeter (CONE). Through the compare between FRW fire-retardant particleboard and untreated particleboard, the influence on the particleboard by FRW fire retardant had been indicated. The results showed that the indexes of heat release rate (HRR), total heat release (THR) and efficient heat combustion (EHC) etc of FRW fire-retardant particleboard were obviously reduced contrast to the ordinary particleboard, but the char-forming rate had a high increase.
Effects of Process on Electrochemical Properties of Pulse Electrodeposited Ti/Pb-WC-PANI Inert Electrodes
Authors: Wang Mei Mei , Cao Mei , Guo Zhong Cheng
Published: August 2011

Ti/Pb-WC-PANI inert electrodes was prepared by pulse electroplating. The effects of process conditions and concentration of solid particles on kinetic parameters of oxygen evolution, appearance of coating and deposition rate was studied and the process of electroplating was optimized. The optimal process conditions were as follows: PANI 30 g/L, WC 40 g/L, pulse on-time 0.5 ms, pulse period 1.5 ms, average current density 2 A•dm-2, bath temperature 25 °C.
Optimizing Design of a Balance Weight Unit for Compensating POS Unbalanced Moment in an Aerial 3-Axis ISP System
Authors: Zhou Xiang Yang , Xin Fei Fei
Published: August 2011

In order to compensate the unbalanced moment introduced by POS into an aerial 3-axis ISP system, a balance weight unit is put forward. Based on the structure characteristics of ISP, an initial sample of balance weight unit is first designed. To minimize the mass and maximize the compensating moment meanwhile, the topological optimization on the connecting frame is followed via FEM that leads to the mass reduced as much as 60%. Then, the design optimization on size parameters about whole unit is carried out further until a satisfied structure gotten. The results show that the mass of the optimized structure is decreased more than 5.5% than before under the condition of compensating moment keeping unchanged.
Performance of Ba0.5Sr0.5Co0.8Fe0.2O3-δ-Ag Composite Cathode Materials for IT-SOFCs
Authors: Zhu Wen Xia , Lü Zhe , Wang Le Xin , Guan Xiao Yan , Zhang Xin Yan
Published: August 2011

°Abstract. In order to develop new cathodes for reduced temperature SOFCs, Ba0.5Sr0.5Co0.8Fe0.2O3-δ-Ag composite cathode was investigated in intermediate-temperature Solid Oxide Fuel Cells (IT-SOFCs). The XRD results suggested that no chemical reactions between BSCF and Ag in the composite cathode were found. The resistance measurements showed that the addition of Ag into BSCF improved electrical conductivity of pure BSCF, and the improved conductivity resulted in attractive cathode performance. In addition, electrochemical impedance spectra exhibited the better performance of BSCF-Ag composite cathodes than pure BSCF, e.g., the polarization resistance value of BSCF-Ag was only 0.36Ω cm2 at 650°C, which was nearly 80% lower than that of BSCF electrode. Polarization curves showed the overpotential decreased with the addition of Ag. The current density value of BSCF-Ag was 0.88Acm-2 under –120mV, about five times of that BSCF measured at 650°C. As a summary, compared to a pure BSCF cathode, it was found that adding Ag in the cathode enhanced the BSCF performance significantly.
Studies on Preparation and Properties of PVDF-g-PAMPS Membrane
Authors: Li Yu Sheng , Guo Gui Bao , An Sheng Li
Published: August 2011

A proton exchange membrane of poly (vinylidene fluoride) grafted onto poly (2-acrylamido-2-methylpropane sulfonic acid) (PVDF-g-PAMPS) was prepared as follows: acrylamido-2-methylpropane sulfonic acid (AMPS) was first added to a N-Methyl pyrrolidone (NMP) solution containing poly (vinylidene fluoride) (PVDF) that was modified with plain sodium silicate. Ammonium persulfate was then added as an evocating agent and PAMPS was directly grafted onto the PVDF that was modified with plain sodium silicate. The influences of AMPS contents on the proton conductivity and mechanical properties were studied. The results showed that AMPS is easily grafted into PVDF modified by Plain sodium silicate (Na4SiO4) and mechanical properties were improved, with increasing of the content of 2-acrylamido-2-methylpropane sulfonic acid, the proton conductivity of PVDF-g-PAMPS membranes was increased.
A Hybrid-Stabilized Solid Element for Piezoelectric Laminated Plate Analysis
Authors: Yang Xiao Mei
Published: August 2011

In this paper, an eight-node solid hybrid-stabilized element for general piezoelectric laminate plate analysis is formulated based on the electromechanical Hellinger-Reissner functional. The independent field variables in the functional include the displacement, electric potential, stress and electric displacement. The non-constant electromechanical stress modes are contravariant in nature and chosen to be orthogonal with respect to the constant ones. The othogonality and the practice put forward in the admissible matrix formulation allow the electromechanical flexibility matrices to be block diagonal. As a result, the computational cost for inverting the electromechanical flexibility matrices can be greatly reduced. Numerical examples indicate that the proposed hybrid piezoelectric element is more accurate than their conventional counterpart.
The Evolution of Heat Treatment on the Tensile Properties of Na-Modified Al-Mg2Si In Situ Composite
Authors: Khorshidi R. , Honarbakhsh Raouf A. , Emamy M. , Jafari Nodooshan H.R.
Published: August 2011

The effect of different solution temperatures has been investigated on the tensile properties of Na-modified Al-Mg2Si in situ composite specimens which were subjected to solutionizing at different temperatures of 480 °C, 500 °C and 520 °C for holding time of 4 h followed by quenching. Tensile test results indicated that elongation value gradually increases upon solution treatment whereas ultimate tensile strength (UTS) reduces. The results of solution treatment also showed that the highest quality index is achieved in 500 °C (354 MPa) and so it is revealed optimum solutionizing temperature level (500 °C) for improving tensile properties.
Preparation and Basic Properties of Three-Ply Kevlar Fiber/Epoxy Composites
Authors: Tian Ye , Guo Mei Jia , Zhang Jian She , Li Yu Cheng , Zhang Dong Xing , Li Di Hong , Xiao Hai Ying , Jia Jin
Published: August 2011

Three-ply Kevlar fiber/epoxy composites used as static ring of ship propeller were manufactured by winding molding. The density of the composites was measured with a GP-300EW type density tester. Barcol hardness of the composites was measured with HBa-1 type Barcol hardness tester. The morphology of cross section of the composites was observed with a VNT-100 type metallography microscope. It was concluded that three-ply Kevlar fiber had low density and reinforcement effect.
Preparation and Study of Novel Nano-Composite Coatings on the Surface of Plastic Moulds
Authors: Wang Qian
Published: August 2011

Compared with ordinary coatings, nano-composite coating usually has a higher hardness and better wear and corrosion resistance. As coating materials, the nano-CeO2/Zn composites were prepared by nano-CeO2 and Zn powder. The microstructure was investigated by XRD and FESEM. The corrosion resistance and hardness of nano-CeO2/Zn composites with different amount of nano-CeO2 were comparatively studied. The results show that the metal corrosion resistance, hardness and density of the composites may be improved significantly by addition of nano-CeO2, and the optimal amount of nano-CeO2 is 1%.
Experiment Study on a Novel Foam System for Enhanced Oil Recovery
Authors: Li Zhao Min , Liu Zu Peng
Published: August 2011

Abstract. Foam, as a mobility control agent in enhanced oil recovery, is becoming more and more attractive. However, this method may be inefficient when water channeling appears in the reservoir due to its heterogeneity. Therefore, it is reasonable to block its flow through preferential channels by an enhanced foam system. A novel foam system is developed by the combination of general two phase foam system with solid particles to improve its performance for deep conformance control in reservoirs. This new foam system involves gas, liquid and particles. Firstly, micro-sphere shape and morphological distribution of particles have been observed through the microscope. Destruction mechanism and stability of multi-phase foam were analyzed in theory. In addition, the concentration of polymer and solid micro-sphere used as the foam agent were determined by orthogonal experiments. Next, micro-sphere displacement experiment shows that it can not only block throats but also migrate through throats by deformation, which can be represented by the pressure curves. Multi-phase foam system presents a similar pressure fluctuation with micro-sphere flooding. Finally, the parallel core experiments were conducted to investigate pressure distribution of two phase foam and multi-phase foam system in porous media respectively. The results show that multi-phase foam can effectively improve the profile control ability and it is adaptable for deep conformance in reservoir.
Rapid Detection of Shellfish Major Allergen Tropomyosin Using Superparamagnetic Nanoparticle-Based Lateral Flow Immunoassay
Authors: Shi Liang , Wang Xi Chang , Liu Yuan , Lu Ying
Published: August 2011

In this study, a competitive assay format using superparamagnetic nanoparticle-based lateral flow immunoassay (LFIA) was developed for rapid, quantitative detection of shellfish major allergen tropomyosin (Tm). Sartorius CN140 nitrocellulose membrane and 0.05mg/mL Tm immobilized in the test line (T line) were optimized in order to improve the performance of the LFIA system. Calibration curves for Tm under PBS-T diluents and carp muscle extraction diluents were established. Limit of detection (LOD) for Tm calibrated by carp muscle matrix was 12.4ng/mL with a work range of 0.01 to 20μg/mL. According to magnetic signals change with the time of sample flowing on the strip, the qualitative time of the LFIA was about 10min, while the quantitative time of the LFIA was about 25min. 30 food species were detected separately by the LFIA and Western blot method to evaluate the specificity of the LFIA. Overall relative agreement of the two methods was 96.7% (29/30). Moreover, intra- and inter-assay precisions of the LFIA for Tm detection were <10.20% and <12.34%, respectively. The average recovery range in different food matrices was 80.3~111.8%, within a reasonable range. Our data confirmed that the superparamagnetic nanoparticle-based LFIA method developed in this study is rapid, simple, high specificity and capable of quantitative test. Consequently, the LFIA has the potential application in the field of point-of-care test of shellfish major allergen Tm.
Study on the Relation between Electrospinning Fiber Diameter Distribution and Taylor Cone Dynamics
Authors: Liu Yuan Yuan , Jing Chang Juan , Liu Da Li , Hu Qing Xi , Li Qing Wei
Published: August 2011

Electrospinning is an effective and versatile technology to fabricate ultrafine nanofiber,however further development is urgently limited due to the low uniformity distribution and unpredictable feature of the fiber deposited. For that sake, experiment has been done and analyzed to address these problems. Relation between process physics-Taylor cone and fiber diameter characters has been discovered. Furthermore, the feature parameters of the Taylor cone are extracted effectively by CCD detection and image processing. The above experiments results and processing data is analysis and examed by the steady jet theory. This paper offers significant theoretical guidance and technical support to the online control of electrospinning fiber diameter.
Fabrication of MgAl2O4 Reinforced Aluminum Matrix Gradient Composites under High Frequency Magnetic Field
Authors: Cao Zhi Qiang , Li Peng Chao , Wang Tong Min , Li Ting Ju
Published: August 2011

Two kinds of gradient composites, whose compositions were Al-20%Mg2Si-5%Si (sample-1) and Al-14.9%Mg2Si-10.3%Si-11.8% MgAl2O4 (sample-2), were fabricated based on the electromagnetic separation under the high frequency magnetic field. The microcosmic structures of two composites were analyzed and the effect of the addition of SiO2 on the microcosmic structure and the mechanical property were discussed. It is found that the particles MgAl2O4 accumulated in periphery of specimen of sample-2, which come from the diffusion reaction between SiO2 and aluminum and magnesium in the melt and was proved by the result of X-ray analysis. Besides the MgAl2O4, the primary phases of Mg2Si, Si also emerged in periphery of specimens. At last, the hardness was given along the radial direction. The result shows that the hardness of the two materials exhibit graded distribution in radial direction and the hardness of sample-2 is higher than that of sample-1 due to the formation of MgAl2O4 particles. Both the two materials meet the requirements of gradient composite material whose outer area is in high intensity and center area is in flexile.
Rheological Constitutive Model Depending upon Temperature and Strain Rate of Sheet TC1 Titanium Alloy
Authors: Yang Liu , Luo Ying She , Yang Bo
Published: August 2011

In order to achieve the numerical calculating rheological forming process of materials, a series of tension experiments under the different temperatures and different strain rates were done on the standard samples of sheet TC1 titanium alloy. The experimental results were analyzed theoretically and the rheological stress constitutive models of TC1 titanium alloy are built combining the strong points of the Perzyna model and Johnson-Cook model. Comparing the calculation results conducted from the model with the experimental results, it proves that the model can reflect the temperature effect and strain rate effect of TC1 titanium alloy.
Effects of Solidification Time on Porosity Content in A201 Aluminum Alloy Castings
Authors: Kuo Yeong Sant
Published: August 2011

The purpose of the present study was to discuss the effects of local solidification time on porosity content of long solidification range A201 aluminum alloy plate castings. With systematic change in the riser size, together with variation of thickness and length, were cast in different kinds of molds. The sand molds with end chill for the plate castings were made of 100% silica sand. The porosity content of A201 aluminum alloy was affected by the local solidification time in this study. The correlation between porosity content and solidification time is found to be split into 2 bands, each being associated with one of the two thickness of plate castings.
Fracture Images Classification Based on Fractional Cosine Transform and Markov Mode
Authors: Zhang Yong Liang , Gao Li Xin , Li Ling
Published: August 2011

Fracture images automatic classification and recognition is an important one of fracture failure intelligent diagnosis, and in which feature extraction is a key issue. In this paper, fractional cosine transform, which is a useful time-frequency analysis method, is used in feature extraction of fracture images, and then the classification of fatigue, dimples, intergranular and cleavage is performed by Hidden markov model (HMM). For metal fracture images classification, experiment shows that fractional cosine transform is better than the cosine transform in fracture images feature description, and the correct recognition rate can be achieved 98.8% based on HMM classification mode
Techanics Experiment Study on PcBN Cutting Tool Dry Turning Austenitic Stainless Steel AISI 301
Authors: Jia Yun Hai
Published: August 2011

High deformation hardening, low thermal conductivity, high built-up edge tendency of austenitic stainless steels were the main factors that make their machinablity difficult. For determination of the suitable cutting parameters in machining austenitic stainless steel by PcBN cutting tools, the samples which were prepared to be used in the experiment, 300 mm in length and 60 mm in diameter, were dry machined in a numerical control lathe. During experiments, dry turning parameters, such as feed rate, cutting speed and cut depth were investigated. The suitable cutting speed and feed rate were determined according to workpieces surface roughness, cutting tools flank wear. Finally, cutting speed of 160 to 200 m/min, feed rate of 0.06 to 0.08 mm/rev and cut depth of 0.10 mm gave the satisfied results.
Numerical Simulation of Residual Stresses in Single Pass Butt-Weld of Dissimilar Pipe Joint during the Fusion Welding Process
Authors: Sun Min Ke , Zhao Dong Sheng , Liu Yu Jun
Published: August 2011

Dissimilar metal welded joints are widely used in engineering structures nowadays. Among the various types of material combinations, dissimilar welded joints of carbon steel and austenitic stainless steel are very common in shipbuilding, nuclear and chemical industries. In this study the finite element software MSC.Marc is employed to calculate the welding residual stresses in dissimilar butt-welded Q235 steel and 304 stainless steel pipes with different welding currents. The calculation results indicate that the welding residual stresses present asymmetric distribution, peaks of residual stresses on inner surface tend to be in 304 stainless side which can be significant higher than the yield stresses of parent metals. Changing in welding current does not have a significant effect on the peak of stress in weld center line.
Investigation of Machining OCr18Ni9 Stainless Steel under Spraying Liquid Nitrogen
Authors: Wang Qiu Cheng , Ba Wen Hui
Published: August 2011

Cryogenic machining is considered as an eco-friendly machining process in manufacturing industry. In order to study the influence of cryogenic gas mixture of nitrogen gas and compressed air on machining performance, the experiments of turning 0Cr18Ni9 stainless steel were performed . The experimental results show that cryogenic machining technology can remarkably improve the surface integrity, cutting tool life and chip-breaking performance. Its advantages of improving machinability are especially obvious at higher cutting speeds.
Calculation Method of the Cracking Resistance of Simply Supported Reactive Powder Concrete Plate
Authors: Zhang Lei , Gao Ri
Published: August 2011

Based on the data obtained by the strength test of simply supported Reactive Powder Concrete (RPC) plate, the calculation method of simply supported RPC plate is studied and the method is proved to be feasible. In addition, based on the analysis of the steel fiber in the simply supported RPC plate, some suggestions, which can improve the flexural strength of simply supported RPC plate, are proposed。
Design and Research on the Refitment of Deep-Hole Machine Tool
Authors: Zhao Hong Bing , Chen Xin
Published: August 2011

Engine lathe has many advantages, such as low cost, multi-use of one machine, etc. In this paper, the design method of reforming C630 engine lathe to a deep-hole machine tool has been researched. In addition, the cutting fluid system and other mechanism of deep-hole machine tool have been researched too.
New Chip Flow Angle Prediction to Investigate the Effects of Ratio of the Cutting Edge Lengths on Chip Flow Using Sharp Corner Tools
Authors: Wang Qing Ming , Lin Hai Long
Published: August 2011

Using the basic model of double edge cutting, the minimum value of the total shear area produced by the two cutting edges is calculated to determine the chip flow direction: shearing takes place in the corresponding direction of chip flow to make the shear area minimum under specific cutting parameters with sharp corner tools. The chip flow angle can be obtained using the expression of the variation of the shear area with the chip flow angle. In this study, RATIO is defined as the ratio of the main to the minor cutting edge length engaged in cutting and is set variable on the basis of the constant equivalent cutting area. The chip flow angle corresponding to different values of RATIO predicted by the current model shows good correlation with the experimental measurement and FEM simulation results for various cutting conditions. An investigation of the effects of RATIO on the chip flow angle has been made under various cutting conditions and it is demonstrated that RATIO has a significant influence on the chip flow angle.
Study on Three-Point Bending Mechanical Performance of Thin-Walled Super Alloy Honeycomb Sandwich with Penetrable Defects
Authors: Yang Kai , Liu Li Wu , Yu Kai Ping , Kong Xiang Hao
Published: August 2011

By three-point bending experiments on XY-plane of thin-walled super alloy honeycomb sandwich with different types and dimensions of penetrable defects, their failure modes and influence of defects of different types and dimensions on their mechanical properties are researched by observing failure modes and performance curves of test samples. Researches show that when failure occurs on sandwich structures under three-point loading, vertical to XY-plane, buckling depression occurs on center part of the upper plate along with fracture failure occurring on center part of the lower plate. Similar to three-point experiment on conventional structures, failure always occurs in the longitudinal regions near middle loading area. When lateral walls of honeycomb or strengthen points of welding are set at center loading area, fracture failure occurs on the lower plate, or only buckling deformation occurs on honeycomb cores. And by comparison, FE model can be used to evaluate its mechanical performance of thin-walled super alloy honeycomb sandwich with penetrable defects under three-point bending load. It is the experimental basis for improving the structural reliability and damage tolerance of the structure.
Influence of Slagging Elements on Manual SHS Welding of Low-Carbon Steel
Authors: Li Zhi Zun , Xin Wen Tong , Han Feng Qi , Qu Li Feng
Published: August 2011

Manual SHS welding is a new method of emergency welding based on SHS reaction. The large amount of Al2O3 created in the reaction restricts the welding performance seriously. In this paper, CaO and MgO were added as slagging elements to improve the characters of the slag, and the effects of their addition have been studied. Results showed that the combustion velocity of the rod decreased when the content of CaO and MgO increased. The rods with 0.2g MgO and 1.2g or 1.5g CaO were easy to control, which combustion velocities were about 12mm•s-1. No obvious changing rule was found for the density of the slag when the content of additives changed. But the densities of slag were all lower than that of metal Fe and Cu. Viscosity calculation showed that the viscosity value of slag increased when the temperature drop. The additive CaO and MgO reduced the slag viscosity. The viscosity value of the slag with 1.5g CaO and 0.2g MgO added was about 0.9 Pa•s at 1450°C and was lower than 0.7 Pa•s at 1500°C. Welding experiments showed the fluidity and the detachability of the slag were improved. Phase composition and microstructure analysis showed that the slag had multi-phases and its matrix was glass. The tensile strength of the joints was above 350MPa, which meets the requirement of mechanical properties for emergency welding. SEM micrograph showed there were slag inclusion in the fracture of welded joint, which was one of the reasons restricting the mechanical performance of the weld joint.
Application of Genetic Algorithm on the Layout of Rectangular
Authors: Cai Han Ming , Liu Han Bin , Xing Ting Ting
Published: August 2011

This article adopts genetic algorithm to solve the problem of guillotine rectangular stock cutting, and designs a new crossover operator and mutation operator towards the specifical problem, finally gives an example to prove this new genetic algorithm is effective to solve the rectangular cutting problem
The Improvement of the Interlock Arm on Ejection Seat Based on the ANSYS
Authors: Yang Jun Hu , Xu Ying , Luo Jian Jiang , Hou Bing Duo
Published: August 2011

Ejection seat is the most important life-saving tool in warcraft. We analyze of the reason why the ejection mechanism works in advance in ejection process, when the aircraft canopy is not throw away. And carry on the deformation analysis of the lock arm in the interlock device to define the strength of the lowest part of the lock arm. Finally, we obtain the stress distribution graph of lock arm, which provides a theoretical reference for the interlock device on the optimal design.
Ant Colony Algorithm: an Application of Design Self-Balancing Torsion Bar
Authors: Huang Zhi Qi
Published: August 2011

Using the improved Ant Colony Algorithm to optimize torsion bar diameter, and take the optimization results into practice. Results not only show the Ant Colony Algorithm is feasible and provides a new method choosing torsion bar diameter but also is satisfied.Based on maximum deformation energy and not exceeding the allowable stress values of a torsion-bar spring, the thesis builds the optimization model for the self-balancing torsion bar.
Multi-Parameter Design and Simulation of Composite Microstructure
Authors: Li Jun Chen , Li Xu Dong , Sheng Jie
Published: August 2011

In order to quantify the design and simulation of various types of composite microstructure, through the Visual C++ programming language developed software 3D-ProDesign, the software for the computer to become real, complex and diverse, "mass" level three-dimensional composite material microstructure structure "samples", in the simulation process of these samples compare actual composite material component objects state , spatial orientation, spatial distribution, crystallographic orientation ,(designed can independent control of the information of the software module), and to be the microstructure of the geometric details of the simulation of an automatic forming, and can be any combination of the basic module is constructed based fiber such as polycrystalline particles enhanced composite material mixed variety of complex models of materials microstructure model, simulation model has been used in material microstructure micromechanical response calculated.
Study on the Relation between Ink Tack Value and Wavers Velocity
Authors: Yang Yong Gang
Published: August 2011

In order to find out the variation law of ink tack during the printing, the ink tack value under 9 different linear velocities of ink distributing roller was tested with an electric ink tack-o-meter in this article, and the relation equations between tack value and the roller linear velocity were built up. The study results showed that the higher the linear speed was, the larger the tack value was, and it would stay in a relatively high tack value (regarded as infinite tack value). At the same time, the relationships between ink tack and the roller linear velocity was different for various inks, so did the infinite tack value.
Imaging Analysis of Image Plane Digital Holography
Authors: Zhang Yi Zhuo , Wang Da Yong , Zhou Zhi Wei , Tao Shi Quan
Published: August 2011

Digital holography microscopy has been widely used as a testing technology in many areas for the ability of real-time three-dimensional imaging. In this study we focus on understanding the system imaging mechanism and recording capacity of the off-axis image plane digital holography (IPDH) which has several advantages. Wigner distribution function and space-bandwidth product are utilized to examine the minimum requirement for the recording capacity of the CCD camera. The discussion provides a good understanding and a useful guide to the formation of practical IPDH systems.
Research on the Physical Characteristics in Maize Deep-Bed Drying Process
Authors: Zhang Ye , Li Chang You , Mai Zhi Wei , Xu Feng Ying , Xu Li
Published: August 2011

In order to investigate the static pressure loss of the maize deep-bed drying related to the ratio of air flux to grain mass, the experiments based on the theory of thermal engineering and deep-bed drying were engaged in. These experiments conducted on the ventilation test stand indicate the relationship between static pressure loss, depth of the bed, ventilative dimensions and the ratio of air flux to grain mass. The investigation results that during the drying, the static pressure loss increases related to the increased ratio of air flux to grain mass with the constant bed depth. The good linear relationship between the static pressure loss and ventilative dimensions was indicated. With the control of the constant ventilative dimensions, the static pressure loss increases related to the decreased ratio of air flux to grain mass and it will dramatically increased when the ratio of air flux to grain mass is small enough. To reduce the static pressure loss, enlarging the ventilative dimensions, reducing the thickness of the drying layer and reducing the speed of the wind will be the proper methods.
Dynamic Simulation of 2K-H Differential Gear Train with Time-Varying Meshing Stiffness
Authors: Ma Ying Chen , Wang Yan , Ma Ji Sheng , Liu Hai Ping
Published: August 2011

Taking 2K-H differential gear train as study object, dynamic equation of torsion vibration was established with influence of time-varying meshing stiffness. The virtual-prototype with nonlinear meshing force was modeled using Virtual.Lab Motion software. Gear contact force was simulated, and it was verified by theoretical data. The reason of meshing vibration is analyzed. The results show that time-varying meshing stiffness is the main excitation of gear system, and gear system is vibratory although the input and output are stable, and the basic frequency is meshing frequency. This research lays foundation for strength checking, optimum design and fatigue life prediction.
Contour Offset Approach to Generate Tool Path for Polyhedral Surfaces Machining
Authors: Xu Jin Ting , Zhang Xiang Kui , Wang Shun Ke
Published: August 2011

Polyhedral surfaces are used as representation model for CAM and process planning purposes because of its simplicity for data exchange and geometric computation. However, there is few tool path planning strategies for such surfaces but the iso-plane method. In this paper, contour parallel path are generated for three-axis ball-end milling. This tool path is based on a novel algorithm for offsetting curves on polyhedral surfaces presented in this paper. It reduces the task of removing complex interfering of offset curve from 3D surface to 2D plane by flattening mesh surface, and avoids costly 3D Boolean set operations and expensive distance calculation. This results in an efficient tool-path generation. Empirical examples illustrate the feasibility the proposed method.
Study on Electrospark Depositing & Welding Power Supply
Authors: Han Hong Biao , Guo Yu Peng
Published: August 2011

The requirements of the power supply design are proposed based on the principle of discharge process in depositing & welding power supply, and a depositing & welding power system schematic is designed according to the requirements. The control manner of the power supply combines RLC (Resistance-Inductance-Capacitance) circuit with fast SCR, and the deposition and restoration can be achieved by using the NE555 circuit to trigger the fast silicon controlled rectifier. Furthermore, parameters such as voltage, capacitance, frequency, motion mode of electrode are probed into, a depositing & welding test is experimented and the waveform of the power supply are analyzed. According to the results of experiments and analysis, it is clear that the output of the power supply can meet the requirements of working successfully and achieve the required standard to do electrospark depositing and welding operations. However, the actual working electrospark frequency is lower than the trigger pulse frequency added on the fast SCR, which result in a lower efficiency in depositing & welding work. Main reasons for this situation is that the relative movement of the electrode and the work-piece can’ t guarantee the best conditions for electrospark and the fast SCR in circuit can’t be reliably turn-off fast. These research laid foundations for further electrospark depositing & welding power supply design and efficiency improvement.
Modeling and Simulation on Fluid Dynamic Depth-Setting TUV Based on FLUENT
Authors: Xu Guo Hua , Shen Xiong , Yu Kun
Published: August 2011

The prerequisite factors for the simulation and controlling of underwater vehicles are hydrodynamic coefficients, which we must measure accurately. In this paper, we took a complex shape remotely operated vehicle as the test model, and figured out the important coefficients that can be applicable for the open-shelf depth-setting TUV through a series of hydrodynamic tests. In order to boost the reliability of a depth-setting TUV system, we carry out numerical simulation and hydrodynamics method on the body of the TUV through the Dynamic Analysis of a single rudder .Comparing with empirical equation, the method has be predicted a high accuracy in hydrodynamic characteristic prediction of depth-setting towed vehicle . After changing the experiment environment of the TUV as possible as we can, a suitability algorithm can be used on the distribute system. And then, the pre-design and later validation of TUV with the conclusion of the simulation based on FLUENT which contribute to shorter calculating period and lower economy could show better depth-setting consequent. The paper draw the Process of the Dynamic Depth-setting TUV for three parts including simulation of the rubber , algorithm experiment of the body and the experiment on TUV.
Study on the Spindle Error Test and Analysis System of Numerical Control Machine Tools
Authors: Zhang Yao Man , Liu Qi Wei , Zhong Sheng , Han Jia Liang
Published: August 2011

It’s always an important means of measuring and improving the performance of machine tools with spindle error test and error analysis. Based on the analysis of the dynamic and thermal performance of spindle, the study is focused on how to get thermal deformation and temperature field by experimental methods. First of all, spindle error analysis methods are researched. Furthermore, developed a spindle error test and analysis system, established a set of complete structure system for spindle error test and analysis. Finally, tests are performed to demonstrate the feasibility of the error test and analysis system of the spindle, which laid foundation for the further research on the experimental analysis of machine tools.
Parameter Determination of Multiple Probes Scanning Method for Profile Measurement
Authors: Chen Xin , Ding Guo Qing , Lei Li Hua , Li Yuan
Published: August 2011

A multiple probes scanning system comprised of two displacement sensors and one angle sensor is studied for ultra-precise profile measurement. The least squares method is applied to reconstruct the measured profile with uncertainty estimation. The parameters that influence the uncertainty associated with the measured profile are investigated. In order to obtain the optimized uncertainty, the determination of the relative parameters has been discussed in two cases. The first one is that how to select suitable sensors when intervals between two displacement sensors are known. The second one is that how to select suitable intervals between two displacement sensors when the specifications of the sensors are known. The processes of the selection in two cases are illustrated respectively according to the actual situations of the measurement.
Study on Precision Machining Titanium Alloy Thin-Walled Parts
Authors: Wang Ming Hai , Liu Zhong Hai , Wang Wei
Published: August 2011

In order to obtain the aims of weight reduction, efficiency increase and quality assurance of thin-walled parts of aircraft engine, the titanium alloy thin-walled parts are machined by precision machining method in the experiment. In this paper the precision machining method is used to cut titanium alloy thin-walled parts. The data of surface roughness is chosen as constraint conditions, and machining parameters will be optimized. The optimization parameters is feasible in this experiment, the optimization method is helpful to improve machining parameters and machining technology of titanium alloy thin-walled.
The Analysis of Effects of Curvature Attribute on Interference in Freeform Surface Blade NC Machining
Authors: Wang Ming Hai , Li Xiao Peng , Sun Yue
Published: August 2011

This paper proposes the Gaussian Curvature by analyzing the free surface of the blade surface curvature, which is based on the Gaussian Curvature parameter mapping method to study the Gaussian curvature of free surface NC machining process interference. We introduce the conception of curvature to analyze the curvature and optimize the cutting parameter and cutting tool parameter to avoid interference phenomena happening and improve the processing efficiency and precision. Take the ball end cutter for example to process simulation, it shows that through the analysis of the free surface curvature method to avoid the intervention process is feasible, and has been verified by the experiment.
Properties of Electrodeposited Ni-SiC Composite Coatings on MB8 Wrought Magnesium Alloys
Authors: Li Xue Song , Wang Li Min , Yang You , Yang Yue , Wu Hua
Published: August 2011

Ni–SiC nanocomposite coatings with reinforcing SiC nano-particulates were prepared by electrodeposition on MB8 wrought magnesium alloys. The microstructure, chemical compositions, hardness, corrosion resistance, and wear resistance of resulting composites were investigated respectively. This article details the state of the art in coating technologies, applied to magnesium based substrates for improved corrosion and wear resistance.The experimental results show that, uniform and compact coatings with good corrosion resistance can be obtained on MB8 wrought magnesium alloys. The wear resistance of the coatings were observed to be superior to hard chromium coatings.
Analysis the Dynamic Strain of AM60 Magnesium Alloy by Means of a Single Laser Shock Processing
Authors: Feng Ai Xin , Nie Gui Feng , Shi Fen , Xu Chuan Chao , Sun Huai Yang , Zhou Peng Cheng , Wang Jun Wei
Published: August 2011

In order to study the dynamic response of metal of laser shock processing, dynamic strain curves of AM60 Magnesium alloy during laser shock processing were measured by resistance strain gauges. Dynamic strain curves of three equiangular rosette near the shock spot and three strain gauges of different distances from the spot center were studied. The results indicated that the strain rate of AM60 Magnesium alloy decreased and plastic deformation increased with increasing impact times. And one dimensional strain hypothesis of laser shock processing was reasonable.
Mechanical Seal Face Texturing by the Acousto-Optic Q-Switched Pulsed Nd:YAG Laser
Authors: Xie Yi , Suo Shuang Fu , Li Yong Jian , Ge Fang Jun , Wang Yu Ming
Published: August 2011

Mechanical seal face texturing has the advantage of improving mechanical seal performance, such as improving opening force, reducing friction coefficient and minimizing wear and so on. In this paper, mechanical seal face, composed of sintered silicon carbon(S-SiC), is textured by the acoustic-optic Q-switched pulsed Nd:YAG laser in multi-mode. The micro-dimples are produced in mechanical seal face, and the profiles are measured by scanning electron microscopy (SEM) and 3D white light interference surface morphology apparatus. Results show that it is in the focus plane that maximal depth and minimum diameter appear and the circular profile of the micro-dimple can be acquired. And the diameter of micro-dimple increases with the increasing of single pulse energy reaching a saturation value at about 3.8mJ, but the increasing of single pulsed energy will reduce the depth of micro-dimple in a small range.
Thermal Analysis of Laser Irradiation of Fused Silica
Authors: Yao Peng , Gong Ya Dong , Yuan Suo Xian , Zhou Tian Feng , Yan Ji Wang , Kuriyagawa Tunemoto
Published: August 2011

To grind fused silica in ductile mode, surface and subsurface micro cracks (SSMC) on ground fused silica should be repaired by CO2 laser irradiation before ultra-precision grinding. In this paper, 2D thermal analysis of single pass laser irradiation of fused silica was conducted, and the simulation results were discussed by comparing with the experiment results. To repair SSMC and decrease the surface roughness of ground fused silica simultaneously, the maximum temperature on the surface during laser irradiation should be controlled higher than 3280 K and lower than 3550 K.
Numerical Simulation on Similarity of Thermal-Mechanical Effects of Thin-Walled Pressure Vessel Irradiated by Laser
Authors: Wang Yu Heng , Liu Feng , Zhang Xiang Hua , Ding Sheng
Published: August 2011

In laser process and laser scientific experiments it is an important research method to investigate analogy of physical parameters between the scale down models and the prototype structure by reduced-scale experiments. To the problem of the thermal-mechanical effects of the thin-walled pressure vessel irradiated by continuous wave (CW) laser, a series of approximatively geometrically scaling models with different scale-ratios are established in this paper. Laser flux and ratios of r(radius of laser spot) to R(radius of shells) keep the same for each scaling model. The similarity regularities of thermal-mechanical effects are analyzed and discussed by means of FEM numerical simulation method. The calculation results can give a guide to design for the scale down models and select for laser parameters in reduced-scale experiments.
Modal Analysis of Ball Screw Based on ANSYS Software
Authors: Yuan Qing Ke , Du Ya Nan , Ding Yao , Wang Tong Le
Published: August 2011

Ball screw is an important part in the machine tool feeding system. This paper researches on the ball screw, establishes the 3D virtual numerical model by Pro/engineer. Modal analysis of ball screw is carried out in three different cases by ANSYS, then gets the intrinsic frequency and vibration model of ball screw. It provides reliable reference for further structure analysis of ball screw.
Knowledge-Integration Model for Networked Manufacturing
Authors: Liu Jiao Jian , Liao Wen He , Guo Yu , Wang Wen Bin
Published: August 2011

In order to maximize knowledge sharing and reuse in networked manufacturing process and improve the rapidity and reliability of decision-making, a knowledge-integration model and its implementation methods are proposed in this paper. First, the requirement for knowledge integration in networked manufacturing is analyzed. On this basis, a knowledge-integration model is built, and then three key technologies are studied, namely knowledge representation and organization based on ontology, knowledge correlation analysis based on complex network and knowledge supply based on decision-making context. This model provides an effective way to realize the optimum distribution of knowledge in networked manufacturing process and to improve the efficiency of decision-making process.
Research on the ITOC Based Solutions for Ship-Piping Jobshop Scheduling
Authors: Li Rui , Liu Yu Jun , Hamada Kunihiro
Published: August 2011

Manufacturing of ship piping systems is one of the major production activities in shipbuilding. The schedule of pipe production has an important impact on the master schedule of shipbuilding. In this research, the ITOC concept was introduced to solve the scheduling problems of a piping jobshop, and an intelligent scheduling system was developed. The system, in which a product model, an operation model, a factory model, and a knowledge database of piping production were integrated, automated the planning process and production scheduling. Details of the above points were discussed. Moreover, an application of the system in a piping factory, which achieved a higher level of performance as measured by tardiness, lead time, and inventory was demonstrated.