bluuebunny/crossref_metadata_2025 huggingface dataset:
Study on Sucrose Powder in Selective Laser Sintering Mechanism
Authors: Yang Lai Xia , Yao Xu Sheng , Xue Ying Bao
Published: March 2014

In this paper, the selective laser sintering mechanism of sucrose powder materials were studied. This paper uses DSC/TG technology to sucrose by thermo gravimetric analysis. The results show that, the melting point of sucrose at 187 °C, its decomposition temperature at 220°C, 300°C after weight loss in more than 50%, sucrose and reasonable final heating temperature was between 187°C~220°C. The results show that, the melting point of sucrose at 187°C, its decomposition temperature at 220°C, 300°C after weight loss in more than 50%, sucrose and reasonable final heating temperature was between 187°C~220°C.
The Relationship between the Hydrolysis Degree and Calcium-Binding Capacity of Whey Protein by Enzymatic Hydrolysis
Authors: Zhao Li Na , Wang Shao Yun , Huang Shun Li , Huang Yi Fan
Published: March 2014

To study the relationship between the hydrolysis degree and calcium-binding capacity of whey protein by enzymatic hydrolysis, the response surface method was firstly used to investigate optimized the hydrolysis conditions of whey protein with protamex and flavorzyme. The optimum process parameters for the whey protein hydrolysis were as follows: Whey protein concentration was 5.0% (w/v), the ratio of protease to whey protein was 4.0% (w/w), the mass ratios of protamex to flavorzyme (w/w) was 2:1, and the reaction temperature was 49 °C. The hydrolysate obtained after the hydrolysis of 7 h, with a hydrolysis degree of 25.92%, possessed the highest Ca-binding capacity of 27.92%. Finally, the relationship between the hydrolysis degree and calcium-binding capacity was established and whey protein hydrolysate with high calcium-binding capacity was prepared, which can provide basic theories for the following optimization of chelation of whey protein hydrolysate with calcium.
The Preparation of a New Type of Pectin Capsules Replacing Gelatin Capsuales
Authors: Zhou Wen Jin , Zhuo Ying , Cui Yi Dan , Wang Chao Jin
Published: March 2014

This document discusses the physical properties and chemical properties of pectin capsules, which are extracted from waste peel, and make compare between pectin capsules and the gelatin capsules from the current market.
Strength Prediction of Double-Lap Woven CFRP Bolted Joint Incorporating Material Softening
Authors: Ahmad Hilton
Published: March 2014

Strength prediction is discussed using a traction-separation damage model incorporating material softening for bolted joint that fails in bearing mode. The modelling approach in the bolted double-lap joint of current work is a simplistic approach to predict the strength of bearing failures. This is clearly shown in bearing failure which occurred experimentally at higher W/d ratios. A simple method for degrading material properties in the region of bearing failure was investigated and, from a preliminary study, was found to be promising. This approach is easily-implemented, and has been shown to be applicable to woven fabric composite materials in double-lap bolted joint.
Microstructure and Properties of 8YSZ with High Component BAS
Authors: Qin Jin , Chen Gang , Du Zhi Ming , Niu Jia Hong
Published: March 2014

The sintering temperature of 8YSZ (8mol% yttrium stabilized zirconia) is very high, usually above 1500°C. BAS (BaO-Al2O3-SiO2) microcrystalline glass can be used as sintering aids to reduce the sintering temperature of 8YSZ. In this research, large proportion (30-50wt%) BAS was added in 8YSZ to observe the influence of the sintering aids. The change rules of mechanical properties such as density test, bending strength and toughness in different material component and sintering process were researched. The results show that physical and mechanical performance improvement with the increase of sintering temperature and sintering time, density and bending strength decreases with the increase of BAS mass fraction. The optimal mechanical properties are obtained by sintering temperature 1300°C, sintering time 0.5h and 30wt% BAS.
Blinking in Photoluminescence of InGaN Devices is Caused by Slow Beating of THz Vibrations of the Quantum Well
Authors: Micheletto Ruggero , Oikawa Kotaro , Feldmeier Christian
Published: March 2014

The photoluminescence from III-V wide band-gap semiconductors as InGaN is characterized by localized large intensity fluctuations, known as blinking, that, despite decades of research, is not yet completely understood. In structures where there is a three-dimensional confinement, as for example semiconductors nanocrystals, the phenomena is supposed to be related to temporary quenching due to highly efficient non-radiative recombination processes (for example, Auger). Nevertheless, in typical InGaN devices, the band structure is an infinitely wide quantum well, so the understanding of the blinking phenomenon remains elusive. We present experimental data and a model that suggests that the discussed optical fluctuations are a general phenomena caused by the slow beating between THz thermal vibrations of the Quantum Well. These minuscule displacements are occurring naturally all over the device, the displacements along the growth direction induce a modulation of the matrix elements that drives the optical emission process; this have measurable effect on the device photo-luminescence. In presence of impurities or gradient of concentration, the vibrations have locally slight frequency differences on adjacent domains, this give rise to a band of beats, and we observe the lower frequency tail of this band.
Effect of Heat Treatment on Wear Behavior of Hot Extruded AA7075 - 4%TiC In Situ Metal Matrix Composite
Authors: Selvam Baskaran , Selvan B.M. Muthamizh , Anandakrishnan V. , Venkatraman R. , Durai Selvam Muthukannan
Published: March 2014

The AA7075-4%TiC metal matrix composite produced through in-situ casting technique was hot extruded and subjected to annealing at 415°C for 150 minutes. Another set of hot extruded AA7075-4%TiC metal matrix composite was heat treated to T6 condition. Dry sliding wear test was conducted with different sliding speeds and loads for both annealed and T6 conditioned composites to compare their wear behaviour. It was observed that irrespective of the heat treatment conditions, the depth of wear, decreases with increasing sliding velocity for all the loads tested and increases with increasing load for all the sliding velocities.
Deep Drawing and Bulging Processes of Hard-Deformed Light Alloy Sheet with Resistance Heating
Authors: Gao Zhan Jiao , Zhang Kai Feng , Wang Bo , Li Chao
Published: March 2014

For enhance the heating efficiency and the formability of the magnesium alloy and aluminium matrix composite sheets, pulse current is adopted to the gas bulging and stamping processes. During the bulging process of magnesium alloy sheet, the effects of dynamic pulse current on the formed sheet combine both thermoelectricity and electro-plasticity. The effect and the applicability of the pulse current heating have been evaluated. The deformation properties, microstructure characteristics, and dislocation movement of the AZ31 alloy sheet during bulging process by the resistance heating are investigated. And the resistance heating has been adopted to improve the formability of SiCp/2024Al composites in stamping process. The pulse current density achieved 21.7A/mm2 and temperature of SiCp/2024Al composite correspondingly reached to around 400°C in the 50s. The results showed that stainless steel inserts between sheet and copper electrodes successfully prevented the heat dissipation and promote temperature uniformity over the sheet during electrifying. In addition, workpiece formed by the pulse current deep drawing shows better shape retention, surface quality and high geometry dimensional accuracy.
Effect of Water Reducer and Cellulose Ether on Sulphoaluminate Cement-Based Lightweight Thermal Insulation Board
Authors: Dong Xiao Nan , Chen Xi , Lu Ling Chao , Yang Shuai
Published: March 2014

The effects of two admixtures content i.e. water reducer, cellulose ether and water-cement ratio on mechanical strength and dry density of cement-based lightweight thermal insulation board are studied. The result indicates that the water-cement ratio is the important influential factor, which is easier to get good workability. And based on the mechanical strength and dry density, the best range of water reducer content and cellulose ether content are 0.3%-0.6% and 0.4%-0.6% respectively.
2124 Aluminum Alloy Aging Forming Springback Study Based on a Combination Forecasting Method
Authors: Gan Zhong , Qian Zhi Wei , Xia Yu Shan
Published: March 2014

This paper proposes a more accurate springback prediction method of ageing forming for 2124 aluminum alloy. In age forming of panels, pre-bending radius, aging time and wall thickness of panels are selected as three parameters, make use of uniform design to arrange experiment and obtain springback radius using ABAQUS simulation. By means of regression analysis, the data is processed to get the influence caused by parameters on springback radius. Regression and BP neural network forecasting method are used respectively to predict springback radius and maximum prediction error is less than 31%. Combination method based on BP neural network is adopted and this method gets the satisfying prediction results that prediction error is within 5%. So conclusion can be drawn that prediction accuracy of combination method is much better than that of regression and BP neural network forecasting.
Random Characteristics on Cutting Interpenetrating Network Composites
Authors: Fan Ning , Fu Xiu Li , Qiao Yang
Published: March 2014

Three kinds of dimensional simplified models were established according to the structure properties of interpenetrating network composites. The cutting process of INC with different structure parameters were calculated by finite element method. The random properties of cutting forces were also analyzed. It is shown that cutting forces would increase when reinforced phase is cut. Micro cracks are liable to be caused on interfaces between two phases. The structure parameters d、α、β have great effects on cutting forces and cause random fluctuation which cause random properties for INC cutting process.
Research of Compression and Energy Absorption Characteristics of Polyimide Foam
Authors: Li Meng Qian , Ma Gang , Xiao Ji Jun
Published: March 2014

The compression and energy absorption characteristic of polyimide foams with three different densities were analyzed in this paper. The compression properties were characterized by CMT7104 Electronic Universal Testing Machine, and the results show that the compressive stress at the same compressive strain increases with the foam density, and the stress-strain curves of polyimide foams with different densities were all composed of elastic region, plateau region and compacted region. The foams ideal energy-absorption efficiency curves were obtained from their stress-strain curves, and all findings show that stress corresponding to at the peak of the energy-absorption efficiency was closed to the compaction stress of material, all their ideal energy-absorption efficiency can reach about 0.8. The polyimide foam is a kind of excellent energy-absorption material.
Study about the Effects of Cryogenic Treatment on the Mechanical Properties of PCrNi3MoVA Steel
Authors: Wang Fei , Chen Yong Cai
Published: March 2014

On the basis of processing the PCrNi3MoVA steel with cryogenic treatment and then experimenting with the static tensile and impulse at room temperature, the effects of cryogenic treatment on macro-mechanical properties of the material is studied. The test results show that tensile mechanical property of PCrNi3MoVA steel can be improved with appropriate number of cryogenic treatment, otherwise can be weakened if the number is inappropriate; at the same time, there is no influence of cryogenic treatment on impact toughness of the material
The Beryllium Bronze for Capacitance Sensitive Accelerometer
Authors: Wang Hong Wei , Tian Xu
Published: March 2014

Based on elastic good for beryllium bronze material making sensitive vibrating components of accelerometer, and developed the capacitance the capacitance sensitive type of accelerometer. Then designed a kind of detection circuit, which can be used to detect differential capacitance signal. Gives the electronic components used in the circuit, through analyzed for solving, then giving the direct proportion relation between the output voltage of the circuit and the sensor signal pickup the capacitance variation. The experiment shows that the sensitivity of accelerometer is about 391.12mV/(m/s2).
Modeling and Control Techniques for Microstructure Development
Authors: Karthikeyan R. , Ganesh Ram R.K. , Kalaichelvi V.
Published: March 2014

True stress-strain data is obtained for 6061Al/ 10% SiC composites by hot compression test. Mathematical models for % volume of recrystallization and diameter of the recrystallized grains are developed with process parameters such as strain, strain rate and temperature. These models are applied for optimization of the grain size and % volume of recrystallization. An attempt has been made to control microstructure evolution during hot deformation using fuzzy logic controller through simulation in MATLAB software. The fuzzy logic controller parameters are tuned using genetic algorithm.
Composition Characteristics of Reconstructed Steel Slag with Electric Furnace Slag
Authors: Huang Qing Liang , Gong Chen Chen , Lou De Li , Zhang Jie , Lu Ling Chao
Published: March 2014

Mineral compositions and granule morphology of reconstructed steel slag with electric furnace slag as an adjusting component were discussed. The vitreous content with hydrofluoric acid erosion and petrographic analysis were carried out. The results showed that the vitreous content of steel slag was lower than that of raw and first decreases and then increases as the calcination temperature increases; C3S becomes hexagonal sheets or square columnar with the size of 40 to 60 microns and C2S becomes spherical with size of 20 to 50 microns. Particle shape is more regular and the size is smaller than that of raw.
Study on the Recovery of Sulfur from a Lead-Zinc Tailings of Fujian
Authors: Zhang Yi Wei , Wang Xiao , Gong Kong Cheng , Wang Zhi Gang , Miao Hai Hua
Published: March 2014

A beneficiation experimental research is conducted on sulfur-containing 10.57% lead-zinc tailings from Fujian. On the basis of the traditional mineral processing technology, the first is pre-classification by high-frequency vibrating, and then flotation-magnetic united technology. Eventually, the average grade of sulfur concentrate is 43.51% with comprehensive recovery 89.33%. The lead-zinc tailings get a comprehensive utilization, which has a better effect.
Biomass Biodegradable Starch Material Cushioning Packaging Products and Plasticizing Properties of Compatibility
Authors: Jia Xiu Jie , Li Jian Feng , Li Fang Yi
Published: March 2014

Biomass cushioning packaging material has been gaining attention in the properties of the materials because of biodegradable and green environmental protection, and the starch plastics play an important role. Urea, formamide, glycerol, ethylene glycol four material compounded with starch respectively, for the purpose to forming hydrogen bonds by the test in this paper, the ability to hydrogen bond with the starch has been observed by infrared spectrum analysis. The results showed that urea, formamide as strong electronegative group stronger binding, glycerol and ethylene glycol are more preferably to form hydrogen bonds with the starch because of more hydroxyl group content.
Performance of Brazed Carbide End Mill Tool for Machining of Ti6Al4V
Authors: Nawaz Saad , Xing Li Xiao , Chai Zhou
Published: March 2014

Titanium alloys are attractive materials for aerospace industry due to their exceptional strength to weight ratio that is maintained at elevated temperatures and their good corrosion resistance. Major applications of Titanium alloys were military aerospace industry, but since last decade the trend has now shifted towards commercial industry. On the other hand Titanium alloys are notorious for being poor thermal conductor that leads to them being difficult materials for machining. In this experimental study brazed carbide end mill of grade 5 is used for rough down milling of Ti6Al4V for large depth of cut under different combinations of parameters and application of high pressure coolant. The machining performance was evaluated in terms of tool wear, tool life, thermal crack and tool breaking. The tool wear was mostly observed at the tool tip and at bottom part of tool thermal cracks were observed which propagated with respect to time. Flank wear due to scratching of the cutting chips and diffusion wear because of high thermal stresses were observed specially at the bottom of the cutting tool. At cutting speed of 38m/min tool wear couldnt be observed due to tool failure because of fracture under high thermal stresses. It was found that maximum tool life is obtained at the speed of 25m/min, feed rate of 150mm/min and depth of cut of 10mm. In the end it was concluded that machining of Ti6Al4V is a thermally dominant process which leads to high thermal stresses in machining zone that results in increasing tool wear rate and fracture propagation.
Determination of Isosteric Heat and Entropy of Sorption of Air Dried Sheet Rubber Using Artificial Neural Network Approach
Authors: Suntaro Kiattisak , Tirawanichakul Supawan , Tirawanichakul Yutthana
Published: March 2014

Equilibrium moisture contents (EMC) of air dried sheet (ADS) rubber were determined by commonly gravimetric-static method with saturated salt solution among surrounding temperatures of 40-70°C correlated to water activity (aw) ranges between 0.10 and 0.9. The experimental results was analyzed by 5 commonly EMC model. The results showed that equilibrium moisture content of ADS rubber decreased with increase of surrounding temperature at constant water activity and the simulated data using Chung-Pfost model has a good relation to experimental data with R2, RMSE and χ2 equal 0.9565, 0.0235 and 0.0006, respectively. However some physical property of ADS rubber sample affects to evaluate EMC modeling. Due to avoid this effect, thus the aim of this research work was to determine EMC value by using Artificial neural network (ANN) method and also evaluate the isosteric heat of sorption by following the Clausius-Clapeyron equation. The results showed that simulated results using ANN approach has relatively high accuracy compared to common EMC model. Finally determination of isosteric heat of sorption and entropy of sorption of ADS rubber were carried on. The results stated that the enthalpy and entropy of heat sorption was power function and polynomial function of moisture content respectively. These two parameters of ADS rubber can be used for prediction suitable storage condition and drying condition for ADS rubber drying in the near future work.
Giant Permittivity of Barium Titanate Prepared by Ultra-Fast Sintering Method
Authors: Xu Chong Jun , Zhang Jin Yong , Zhang Dong Ming , Fu Zheng Yi
Published: March 2014

Recently work shown that an imperfection interface can be deduced by a fast sintering, which termed as Self-propagating High-temperature Synthesis plus Quick Pressing (SHS/QP). In order to investigate the effect of imperfection interface on the transport properties of function ceramics, the SHS/QP was applied to fabricate permittivity BaTiO3 in this article. It was found that this ultra-fast sintering method could not only lead to a broaden-amorphous grain boundary but also semi-conductive grain body simultaneously. It is interesting that the new rapid route can result in the giant permittivity of BaTiO3.
An Overview of the Mechanism of Non-Metallic Materials for Energy-Saving and Environment-Protection
Authors: Ye Zhang Huang , Yan Qiang , Wang An Jian , Luo Rong Gui , Liu Gu Wang
Published: March 2014

Industry development Planning for Energy Saving and Environmental Protection in Twelfth Five Year has proposed that market share for efficient energy-saving technology and equipment will be raised from less than 5% at present to about 30% in 2015, and the output value will reach 500 billion yuan. The 18th National Congress of the CPC has proposed to put ecological civilization construction in a prominent position to build a beautiful China. State Council of China issued the Prevention Action Plan for air Pollution in 2013. It is a tough task and a long way to go. How can we realize the planning goal Many non-metallic mineral materials have good applications in energy saving and environment protection. China is abundant in various non-metallic mineral resources. Therefore, development for non-metallic mineral resources for energy saving and environmental protection has good prospects. The paper gives an overview of the mechanism of several main non-metallic materials for energy-saving and environment-protection.
The Design and Test of Durability Test Platform for Small Scale Electromotor
Authors: Guo Jing
Published: March 2014

In order to testing the parameters changing of electromotor during the lifecycle, the test platform is designed. For different equipment, the controller of the test platform can simulate different real load of electromotor. During test, the controller can not only acquisition some basic parameters of the electromotor, such as voltage, current, temperature, rotate speed, but also protect the test platform when one parameter exceed setting value. The test platform test a electromotor. The result show that the test platform can simulate real load of the electromotor, can display and store all parameters of electromotor, can find the weak point during the whole lifecycle.
The Design of Active Low Pass Filter
Authors: Liao Yi Cheng , Zhao Hong Bo , Liu Yi Jie , Yu Qi
Published: March 2014

This paper is for the filter users. It introduces a simple method to design Butterworth active low pass filter. By means of calculating, simulating, making a material object and debugging, it verifies the feasibility of the method. Combining design with practice, it shows the merit and demerit, which is of great significance for the design and manufacture of filters.
Development of a New Pulse Discriminating System for Micro Electro Discharge Machining (μEDM)
Authors: Nirala C.K. , Gupta G. , Agrawal A. , Saha P.
Published: March 2014

Tool wear in μEDM is a serious problem which causes dimensional inaccuracy in the fabricated components. In order to address this issue, tool wear monitoring and compensation in μEDM has become a thrust area of research. The existing tool wear compensation system very much relies on the pulse discrimination (PD), based on the voltage and current signature of discharges. The available PD systems applicable to a fixed process parameter and thus it also makes the existing tool wear compensation system valid only to that parametric setting. In this context, the authors have proposed a new pulse discrimination strategy for μEDM so that it could work at different parametric setting. Therefore, the developed PD strategy could help micro fabrication industry by making the existing tool wear compensation system suitable for any process parameters.
Capacity Optimization of Steinmetz Compensation Circuit for Electrification Railway Unbalance Controll
Authors: Wang Guo , Pei Xiao Xiang , Zhou Mo
Published: March 2014

Current unbanlance is one of the three-phase traction substation power quality problems. Through comparative analysis of commonly used unbalanced control methods for electrification railway, it can be seen that Steinmetz compensation theory is the effective solution for electrification railway unbalance.But the Steinmetz compensation capacity is large. If compensation target is limited in the unbalanced degree within the scope of the national standard, the compensation capacity can be greatly reduced. Through the optimization of the compensation measures and MATLAB simulation verification, the results have been showed that the optimizing compensation measures can greatly reduce the compensation capacity for meeting the national unbalanced degree standard.
The Application of Phase-Locked Loop Frequency Tracking in the Intelligence-Type Induction Heating Power Supply
Authors: Li Yan Fang
Published: March 2014

As the induction heating power was working, its load resonant frequency constantly changes. In order to improve the efficiency of power supply, it requires that the inverter output frequency can follow changes in natural frequency of the load, namely the frequency tracking control. Aiming at the deficiency of the frequency tracking control system, this paper presents a method that the phase locked loop (PLL) tracking system works on real-time control of the output frequency of the power supply,and introduces a phase locked mathematical model which fits the inverter power supply, and offers a simulated analysis by using PSPICE. Through experiments, the system proves to be good at frequency tracking.
Control of Cascaded H-Bridge STATCOM for Load Compensation
Authors: Wang Song , Tan Long Cheng , Wang Ping , Li Yao Hua
Published: March 2014

The math model of cascaded H-bridge static synchronous compensators (STATCOM) of star configuration is described firstly in this paper. Based on the math model, an advanced control method is proposed, in which all control variables are dc, which are suitable for getting no steady-state errors using simple PI controllers. The simulation results demonstrate the validity of this method, and the experiment results are specially presented to verify the fast response under dynamic process.
Design of Arbitrary Waveform Generator Based on Direct Digital Synthesis Technique Using Code Composer Studio Platform
Authors: Xu Sheng Hui
Published: March 2014

This paper deals with the design of arbitrary waveform generator using the Direct Digital Synthesis (DDS) technique. The key idea is the utilization of Look-up Table (LUT) supported with Code Composer Studio (CCS) platform. The synthesized arbitrary waveform is generator by storing the samples of the signal described by mathematical equation in the form of LUT in the memory of TMS320VC5416 Digital Signal Processor (DSP) and subsequently by recalling the stored samples periodically. The D/A converter generated the analog waveform. Experimental results have been included.
A New Hybrid SSD Architecture Based on SLC and MLC
Authors: Li Hong Yan , Gui Chao
Published: March 2014

In this study, we present a novel internally hybrid SSD architecture (SMARC) which consists of both SLC and MLC flash memory packages, instead of only either SLC or MLC. By periodically migrating data between the two different portions (SLC and MLC space) according to running workloads dynamics, the proposed architecture is able to exploit their respective advantages complementarily to help overall performance, reliability and energy consumption. Our simulation results of a variety of workloads have shown that SMARC can improve the performance by nearly an order of magnitude, at the same time, significantly enhancing reliability and reducing energy consumption.
Effect of Sodium Alginate on the Properties of Composite Protein Films
Authors: Lei Qiao , Huang Zhi Ying , Pan Jia Zhen , Bao Jian Qiang , Xun Qian Nan
Published: March 2014

Effects of sodium alginate on properties of WPI-NaCas composite films optimized by previous uniform design experiments were investigated. Films were prepared with different concentrations (1%, 2%, 3%) and ratios (1:0, 5:1, 3:1, 1:1, 1:3, 1:5, 0:1, ratio of composite protein solution to sodium alginate solution) of sodium alginate additions. Results suggested increases in water solubility of films and middle diameter, volume-length mean diameter and area-length mean diameter of film-forming solutions. Addition of sodium alginate decreased the gas and water vapor barrier properties of composite films, however, their mechanical properties could be improved by proper usage. Fourier transform infrared spectroscopy (FTIR) and scanning electron microscope analysis indicated that protein and sodium alginate presented well interaction and compatibility.
The Body Structural Optimization Based on Safe Side Impact
Authors: Zhao Guang Yao , Zhao Yi Feng , Xie Li Yang , Li Xue Jiao
Published: March 2014

In view of analyzing the whole side crashworthiness, based on C-NCAP side impact regulations, this study has analyzed the structural characteristics influencing the side impact of car, and proposed the corresponding structural optimization case. According to FEM, the body optimization case has been simulated and contrasted with the real results. As a result, a good side crashworthiness of the car has been obtained, which helps reduce the cost and the quality of the car. Besides, the study has also done simulation work of the rigidity and modal of the body-in-white and compared it with the real results, which has further tested the correctness of optimization model and helped achieve effective approaches to the design of the car side crashworthiness.
Simulation Analysis and Optimization Design of Double-Wishbone Independent Suspension
Authors: Wang Xi Ting , Zhao Yi Feng , Jiao Bin
Published: March 2014

The parameter modeling for the front double-wishbone independent suspension of a vehicle is set up in the development environment of ADAMS, and then, the kinematics simulation analysis for original design parameters are processed. The contribution of design parameters to the sensitivity of the double-wishbone independent suspension is analyzed and the influence of design parameters on the performance of the suspension such as the wheel alignment parameters is investigated. The optimal design for the suspension is carried on by using the experiment design method, which not only realizes the requirement for good wheel alignment parameters, but also improves the sideways displacement of wheel obviously.
Research and Development of Steel Casting CAD/CAE Integration Technology Based on the Neutral STEP File
Authors: Wang Lin , Zhou Jian Xin , Tang Hong Tao , Liao Dun Ming
Published: March 2014

The casting process CAD system developed based on the existing three-dimensional CAD software has many inadequacies. This paper innovatively puts forward the steel castings three-dimensional casting process CAD system based on neutral STEP file. In this study, by taking advantage of universal CAD data-exchange standard STEP format for data exchange, a practical three-dimensional CAD system was developed based on Open CASCADE Geometry Kernel. The system has the function of practical casting process modeling, including design and modeling of gating system and riser design and so forth. The system exceeded the deficiencies of the existing casting process CAD system. It resolves the foundry Enterprises dependence and limitations on the type and version of commercial 3D CAD software, enabling to realizethe integration of CAD and CAE on casting process.
The Research of Remanufacturing Technology Applied to Lifting Machinery
Authors: Jin Han Xun , Yin Chen Bo , Guo Ming , Gong Yue
Published: March 2014

Lifting machinery usually fail or become scrapped after a certain period of use for a variety of reasons. Thus, they often need remanufacturing technology. The purpose of this paper is to research and analyze how to apply remanufacturing technology to lifting machinery. In this paper, the background of remanufacturing technology is firstly discussed. Then illuminate the specific processes of remanufacturing technology including the cleaning measures of those components after dismantled, the non-destructive examination (NDE), and assessment software using to test the perfectness of the produces remanufactured. Finally, the benefits of the widespread use of remanufactured lifting machinery which can make the best use of various resources to achieve energy saving, material saving and environment protection goals are discussed in order to draw key conclusions.
The Method of Transforming Ordinary Machine Tools to Ultrasonic Vibration Deep Hole Drilling Machine Tools
Authors: Shen Xue Hong , Zhao Hong Bing
Published: March 2014

Ultrasonic vibration deep hole drilling is a kind of new technology for combining ultrasonic vibration with deep hole drilling. This paper mainly describes the transformation of lathe, vertical milling machine and vertical machining center by bits vibration direction or adding some auxiliary institutions, then make it have the ability of drilling deep hole. With these transformation, machine tools have some advantages, such as the efficiency and precision are improved, machining quality is stable, chip removal is easy, the cost is low. Besides, it also provides a good way for making full use of existing equipments.
The Oil Spill Analysis and Structure Improvement of Marine Sliding Bearing
Authors: Hu Guo Fu , Yang Shi Ping
Published: March 2014

In view of the problems serious leakage of lubricating oil in the current slide bearing of a ship motor shaft sealing.This paper analyzed the reasons of bearing oil through the work principle of sliding bearing and the sealing structure. And put forward to solve leakage measures, provide a certain reference value for the seal structure design of sliding bearings and other rotation machine .
Optimization Design of Rectangular Cross-Sectional Wire Race Ball Bearing
Authors: Zhao Yi , Yao Jin , Tong Chun
Published: March 2014

Wire race ball bearing with large radial size and small axial size, saves space extremely, and is widely used in rotary devices of large machineries. This paper establishes a mathematical model of optimization design of rectangular cross-sectional wire race ball bearing,and considers minimum friction torque as objective function, and analyses constraints of contact intensity and design specifications of wire race ball bearing, and forges an optical design method that determines the number of balls, the diameter of ball, the contact angle and the diameter of ball center circle as optimal design parameters, to attain the purpose of extending bearings life. Comparing results of Optimization with original sample, the friction torque of ball that bears maximum load reduces by 10.20%. This method provides a reference for conducting further scientific researches on wear of wire race ball bearing.
Numerical Flow Simulation in a Horizontal-to-Vertical Elbow
Authors: Zhou Ai Zhao , Wu Jian Guang , Li Luo Peng , Chen Dong Mei , Yang Huan Qiang , Chen Fei
Published: March 2014

The petroleum industry has been faced with the problem of flow-related erosion and corrosion during oil production and transportation for decades. In this paper, to characterize the flow behavior inside a pipe elbow, the RNG k-ε turbulence model with MUSCL discretization scheme is applied to the simulation. The calculation results are analyzed and conclusions can be drawn from these analyses: The simulations predicted value for the diametrical pressure coefficient is in excellent agreement with published correlation obtained from experimental data; The simulations indicate that the maximum wall shear stress occur near the inner corner wall, just downstream of the entrance to the elbow; At the entrance of the elbow, it is clear that the faster moving fluid starts out displaced towards the inner radius and the wall shear stress taking on its maximum value there; just downstream of 45°plane, the flow separates from the inner radius and a large separation vortex is formed that extends downstream.
Strength Safety Coefficient and Fatigue Life Analysis of Coupling Diaphragm Based on FE-Simulation
Authors: Tian Zhong Ke , Yin Chao , Yang Fa He
Published: March 2014

Based on average loading assumption, a non-linear contact finite element model of coupling triple-diaphragm assembly configuration is established. In accordance with the result of diaphragm equivalent stress, the yield strength criterion and high cycle-stress fatigue life norm are adopted to calculate strength safety coefficient and fatigue life of coupling diaphragm. The durability of coupling diaphragm is proved enough numerically.
Analysis and Research of the Technology Based on Carbide Tool Passivation
Authors: Mao Zhi Xing , Cai Chang Tao , Qi Jing Xing
Published: March 2014

There are many factors having effects on the cutting performance and useful time of cutting-tools, such as cutting-tools material, geometry parameters, structure and the optimization of cutting parameter, etc. But the condition of cutting-tools edge shouldnt be ignored. As is known to all, the micro gaps of cutting edge extend easily in the process of cutting, and accelerates the wear and damage of tools. As for the current situation of low passivation efficiency in edge, high loss of passivation and uncontrollability in blade shape, some improvements and new technology for applying to tools passivation are proposed based on the analysis and research about carbide tool passivation. Whats more, some exploration experiment will be done. The results show that those passivation technology can improve the processing efficiency of metal-cutting, cutting tool expectancy and reduce manufacturing cost.
The Study on the Wear Characteristics of Flank Lock Type Precision Locknut in the Dynamic Conditions
Authors: Chen Chih Ming , Sun Chin Huang
Published: March 2014

This study investigated the wear characteristics and anti-loosening characteristics of flank lock type precision locknut in the dynamic percussion vibration test. The experiment was conducted by using horizontal realistic dynamic percussion vibration test machine. The objective is to simulate the loosening condition of the locknut which was assembled in ball screw and machine tool spindle. Through this study, the wear resistance and anti-loosening characteristics of the precision locknut under the dynamic test were investigated by closely observing the roughness, flatness and tooth angle, seat surface and surface morphology before and after the test. The test results were used to calculate axial force ratio and anti-loosening ratio to understand the wear properties and anti-loosening properties of precision locknut under the dynamic conditions.
Statics Analysis on Sail Structure for Ocean-Going Ships
Authors: Xu Li , Fang Jun Ting , Li Wen Yuan , Chen Shun Huai
Published: March 2014

It is becoming a trend to achieve the purpose of energy conservation and emissions reduction that application of sailing navigation technology in large ocean-going ships. Two kinds of three-dimensional models of sail are presented in this paper, and they are made to do a structural calculation under the action of gravity with the ANSYS simulation software. Then the deflection of the sail under the action of gravity load and the distribution of its stress is concluded. A more reasonable design of sail structure can be selected.
Study on the Corrosion Resistance Behavior of Multi-Elements Alloy CoCrFeNiTi0.5
Authors: Pang Sheng Jiao , Li Ping , Li Ting Ju , Zhao Jie
Published: March 2014

Multi-elements alloy with good thermal stability is expected to serve as the superheater tube material of ultra-supercritical boiler and may suffer from hot corrosion under the coal-fired atmosphere. In this study, the corrosion resistance behavior of multi-elements alloy CoCrFeNiTi0.5 coated with alkali metal sulfates at 750°C is investigated systematically. The results showed the corrosion kinetics curves of the alloy followed a parabolic growth rate. The corrosion products, which consisted of volatile Na (CrO4) (SO4), (Fe,Ni) xSy, Cr/Ti oxide as well as compound oxides with spinel structure AB2O4, were found in the oxide scale and internal attack zone of the alloy. The oxide layer had good adhesion with the matrix at the beginning of corrosion. Prolonging corrosion time, the oxide layer in thickness increased and became loose as well as porous. The micro-pores generated in the interface between the oxide scale and matrix with the occurrence of the internal oxidation and internal sulfidation. In a word, the corrosion resistance behavior of multi-elements alloy CoCrFeNiTi0.5 at 750°C can be attributed to the formation of the protective oxide layers and to the basic fluxing in molten Na4SO4 induced by low melting point eutectic.
Research on CAD/CAE System of Gate Valve Based on UG
Authors: Wang Da Yong
Published: March 2014

Gate valve is widely used for regulating flow and pressure of the pipeline in water conservation and chemical industry. High-precision, safe and efficient gate valve is a challenge for pipeline transportation. Suffered from the impact of the fluid, the gate valve is apt to be abraded and cause failure. This paper was based on the CAD/CAE (Computer Aided Design/ Computer Aided Engineering) system. Besides,this paper carried out researches on the influence of factors, including the fluid medium, the flow velocity, the wall thickness of gate valve body and the cross brace. In addition, the stress of the gate valve body was also in this paper studied. The simulation based on UG demonstrated the improvement of the gate valve stress.
Experimental Investigations of Single and Multi-Fault in Rotor System
Authors: Mogal S.P. , Lalwani D.I.
Published: March 2014

Many researchers dealt with single fault but in real life situations, combined action of two or more single faults are usually present. Multi-faults (two and three combinations) were studied by few researchers. Researchers have mostly studied the vibration behavior of a rotor with misalignment, unbalance and rub separately. This paper presents one such case, where multiple faults are considered together in a rotor system, i.e. misalignment, unbalance and rub. The objective of this paper is to experimentally investigate the vibration response of combined of three faults misalignment, unbalance and rub using Fast Fourier Transform (FFT). FFT spectrum of combination of three faults misalignment, unbalance and rub show 1 X and 2 X are predominant and many sub harmonics are generated.1X peak represent unbalance, 2X peak represents misalignment and sub harmonics shows rub fault.
A Brief Review on Fault Diagnosis of Rotating Machineries
Authors: Mogal S.P. , Lalwani D.I.
Published: March 2014

Vibration in any rotating machines is due to faults like misalignment, unbalance, crack, mechanical looseness etc. Identification of these faults in rotor systems, model and vibration signal based methods are used. Signal processing techniques such as Fast Fourier Transform (FFT), Short-Time Fourier Transform (STFT), Wigner-Ville Distribution (WVD) and Wavelet Transform (WT) are applied to vibration data for faults identification. The intent of the paper is to present a review and summarize the recent research and developments performed in condition monitoring of rotor system with the purpose of rotor faults detection. In present paper discuss the different signal processing techniques applied for fault diagnosis. Vibration response measurement has given information concerning any fault within a rotating machine and many of the methods utilizing this technique are reviewed. A detail review of the subject of fault diagnosis in rotating machinery is presented.
The Influence of Front Support on Vibration Behaviors of TBM Cutterhead under Impact Heavy Loads
Authors: Huo Jun Zhou , Ouyang Xiang Yu , Zhang Xu , Chen Jing
Published: March 2014

Cutterhead is one of the key parts of Tunnel Boring Machine, TBM. The performance of cutterhead has a great impact on the boring capability of TBM. The impact heavy torque and thrust force bore by cutterhead during the tunneling process will cause severe vibration and lead to decline in its life even broken, which affect the boring efficiency. In this paper, a TBM mainframe model of Northwest Liaoning project has been built based on the multi-body system dynamics simulation platform ADAMS. It also has been discussed in the paper that the influence of front support on the vibration characteristics of cutterhead. The simulation results show that the front support will improve the vibration behaviors of cutterhead: The stabilization time of rotational and translational motion decreases 90% and 10% at least, the axial amplitude decreases 8%. All these conclusions have demonstrated that front support should be adopted when designing the TBM.
Analysis of Detecting Multi Crack with Location and Size in Simply Supported Shaft Using ANFIS
Authors: Nanda J. , Das L.D. , Das H.C. , Biswal A. , Tripathy A.
Published: March 2014

A methodology to detect multi crack, with crack location and size due to transverse loading is presented in this paper taking the advantage of Adaptive neuro-fuzzy inference system (ANFIS) using modal analysis of cracked shaft. A simple supported shaft is subjected with axial and bending load for same angular position along with its longitudinal direction. The natural frequency of the shaft with its various crack positions and size are accurately determined analytically using strain energy release rate and stress intensity factor. The vibration parameters such as first three relative natural frequencies with their mode shapes at different locations and size are supplied to ANFIS to optimize the results. The crack location and size predicted from ANFIS model are verified with the theoretical data with acceptable error. The present method used in this paper is suitable and can be easily extended to complex structure with different orientation of multiple cracks.
Preparation and Study on the Waterproof Performance of Polystyrene Lightweight Composite Insulation Materials
Authors: Li Xiao Long , Li Guo Zhong , Wang Ling , Su Deng Cheng
Published: March 2014

In the experiment, polystyrene particles were used as lightweight aggregate to prepare lightweight composite insulation board which was mixed with fibers and waterproofing agent. The effect of water-cement ratio and volume ratio of polystyrene particles and cement on the density and mechanical properties of polystyrene insulation board was researched. And styrene-acrylic emulsion, stearic acid emulsion and composite emulsion waterproofing agent were used respectively to modify the waterproof of insulation board. Besides, the underlying action mechanism was explored. The results show that the optimum volume ratio was 5:1, and the optimum water-cement ratio was 0.45. And when the content of composite emulsion waterproofing agent was 8%, the 2h and 24h water absorption were 6.0% and 8.1% respectively.
Aluminum Pigments Encapsulated by MTES and TEOS for Corrosion Inhibition and their Characterizations
Authors: Pi Pi Hui , Liu Chao , Wen Xiu Fang , Xu Shou Ping , Cheng Jiang
Published: March 2014

Aluminum pigments were encapsulated by hydrolysis and condensation of tetraethoxysilane (TEOS) and methyltriethoxysilane (MTES). The influences of solvents and ratio of MTES/TEOS on corrosion inhibition performance were studied. The FTIR, XPS and SEM analysis showed that both TEOS and MTES hydrolyzed and condensed at the same time to form a compact and thin sol-gel layer on the surface of aluminum pigments. Aluminum pigments encapsulated by MTES and TEOS, which can hardly generate H2 in acid media of pH=1 within 12h, show greatly excellent corrosion resistance than that only by TEOS or by MTES, due to the formation of a compact and thin hybrid film to protect aluminum particles from corrosive media.
The Simulation of Stack-Manipulator to Aluminum-Ingot Based on ADAMS
Authors: Yao Tian Chang , Wu Hai Tao , Liu Hong Bin , Xu Da Wei , Cai Jia Cheng
Published: March 2014

The authors build the three-dimensional model of stack-manipulator to aluminum-ingot in SoildWorks,and then import the model into Adams to create a simulation model via the interface between them.Adams runs dynamic and kinematics simulation of the model to measure some kinematic data of manipulator and the contact force of gear part.The dynamic simulations have forecasted the performance of products based on the model well and show the importance of Adams in product development.