bluuebunny/crossref_metadata_2025 huggingface dataset:
The Overall Finite Element Analysis for Hydraulic Excavator Working Device
Authors: Huang Qiu Bo , Shui Lei , Sun Zhao Liang
Published: June 2012

This paper chooses the WYL50 excavator as an example, using Solidworks to get the 3-D model and assembly. Then it will use overall finite element analysis method to analyze the strength and deformation of the working device which is under a typical working condition through the ANSYS Static analysis module. The stress and deformation cloud chart is acquired. The analysis results provide the design and improvement of the excavator with theoretical basis.
Non-Dominated Sorting Particle Swarm Optimization for Concept Design of Tanker
Authors: Ren Wei , Xiong Ying , Zhang Shu Long
Published: June 2012

A study of application for Multi-objective particle swarm optimization algorithm in tanker conceptual design is researched in the paper. The tanker synthesis model with effectiveness and cost as its objective is considered in optimization model. The Pareto solutions are calculated based on Non-dominated Sorting Particle Swarm Optimizer (NSPSO). The example shows that the uniformly distributed Pareto front is obtained by using NSPSO.
Application of View Cast Software in Foundry Technique Designing
Authors: He Bin Feng
Published: June 2012

Taking large scale steel casting for example; View Cast software was introduced to the designing process of the large scale steel casting technique. Solidification results show that the annular pop gate is beneficial to the casting. The side risers are used but it cannot eliminate the shrinkages because of the limited feeding distance according to the simulation results. So a top riser replaced it and some chills are used in the necessary regions. The results show that the new feeding system can help to progressive solidification and the shrinkages are eliminated. The temperature distribution is very clearly and the solidified part of casting is transparent which improved the visible effect and made it easy to read. People can estimate the shrinkage position easily.
The Finite Element Analysis of Reducing Diameter of Centrifuge Pipe Mould by Hot Extrusion Process
Authors: Fan Jing Long
Published: June 2012

In this paper, based on elastic-plastic and thermal-stress coupling finite element method (FEM), the centrifuge pipe mould was molded by Pro/E, and imported into the MARC after meshing, and performed finite element analysis to extrusion stability and the process of hot extrusion by MARC. By summarizing the 3D deformation regulation of the hot extrusion centrifuge pipe mould, the stress changing and mechanical property parameters during the process of hot extrusion , providing reference for the design of equipment in radial hot extrusion. At last, the study could be useful for the device design of radial hot extrusion of the centrifuge pipe mould. At the same time, this method could be use to analyze the other relative thermal extrusion processing.
Advances of a FEM for the Failure Probability Evaluation of Masonry Vehicular Bridge Support Piers
Authors: Martínez-Mártinez Luis Horacio , Mendoza-Chavez Gustavo , Delgado-Hernandez David Joaquin , De León Escobedo David , Guzmán Elia Mercedes Alonso , Molina Wilfrido Martínez , Arreygue-Rocha Eleazar , Chávez-García Hugo Luis , Arteaga-Arcos Juan Carlos
Published: June 2012

One of the responsibilities of a Civil Engineer is to make decisions regarding preservation of infrastructure; therefore, there have been established concepts such as risk and risk analysis. Risk analysis, is a methodology applied to determine and evaluate the risk magnitude. From the structural engineering point of view, it is required that any structure become secure, this means that the capacity to withstand external actions (strength) will be higher than these actions (loads). In order to determine the structural safety, it is required to define the failure of the structure that it is not strongly related with the collapse of the structure; the failure criteria needs to be fixed depending on the use of the building and the consequences associated with the interruption of services provided by the facility. The failure then, is calculated by means of a limit state function in where it is established the failure criteria; failure is reached when a specific condition (strength) is surpassed by the actions over the structure. The present work aims to propose a preliminary Finite Element Model (FEM) that represents a pier used as support for vehicular bridges. This FEM is required for the assessment of mechanical behavior of the structure that will be used for the determination of the limit state function needed for risk assessment. Most of the simulations with FEM presented in literature are very used for modeling of masonry walls, but it is not usual to model structures such as bridge piers.
Exhaust System Finite Element Analysis and Optimizing Design
Authors: Liu Hong Jun , Zhi Shu Ya
Published: June 2012

The vibration of the exhaust system has led to cars vibration and high noise. Without doubt, they affect the performance and especially make the people particularly uncomfortable who ride in the car. The paper will resolve the trouble by the application software of the SOLIDWORKS. It establishes the exhaust system model then makes its finite element analysis of frequency to research the relationship between lugs hanging positions and amplitudes. Obtain a conclusion is to change the hanging position can reduce the maximum amplitude of the exhaust system. The article will show how to finish the all working process from building a model to getting the optimization scheme of reducing the exhaust system vibration and the best hanging position. Thus it provides a simple feasible method as the paragon of designing other parts.
Bi-Sb-Te Based Thin Film Thermoelectric Generator
Authors: Cai Zhao Kun , Fan Ping , Zheng Zhuang Hao , Cai Xing Min , Zhang Dong Ping , Chen Tian Bao , Liu Peng Juan
Published: June 2012

N-type Bi2Te3 and p-type Sb2Te3 thermoelectric thin films have been prepared by RF and DC co-sputtering. The Seebeck coefficient of n-type Bi2Te3 and p-type Sb2Te3 thin films is about -122 μVK-1 and 108 μVK-1, the power factor is about 0.82×10-3 Wm-1K-2 and 1.60×10-3 Wm-1K-2. Then, the films have been selected to fabricate the thin film thermoelectric generator. The results show that the open-circuit voltage of 12.2 mV and the output power of 3.32 μW are obtained for a thin film generator with the temperature difference at 60 K.
CAISM Analysis Based on Learning Styles of OT with Algebra Concept
Authors: Tseng Jui Chiao , Lin Yuan Horng , Yih Jeng Ming
Published: June 2012

The purpose of this study is to use ordering theory (OT) to determine existing hierarchies among items with specifically learning style. Furthermore, an empirical data of capacity concepts testing for algebra learning was analyzed based on the integrated method student-problem chart (S-P Chart) is adopted to classify all students into proper learning styles. Cooperating S-P chart and OT are as an integrated method of cognition diagnosis. The empirical data is algebra concepts test of university students. The results showed that cognition diagnosis would be feasible for remedial teaching and design of teaching materials. Finally, some suggestions and recommendations for future research and educational research are provided.
Investigation on Complex Pressure Fluctuations in a Gas-Solids Circulating Fluidized Bed Rieser
Authors: Xu Jun , Chen Xing Xing , Wang Gui Lei , Wei Yao Dong
Published: June 2012

The experiment is carried out in a 13-meter-high circulating fluidized bed(CFB) to investigate gas-solid two-phase flow by pressure sensor. The axial pressure and pressure fluctuation are measured in different solid mass fluxes. With the solid mass flux increasing, pressure gradually increases, and pressure gradually decreases along the riser upwards. The characteristic of pressure fluctuation in the riser is analyzed, which indicates that pressure fluctuation in the riser originates from the inlet. The intensity of the pressure fluctuation decreases along the riser upwards. This pressure fluctuation is composed of two types: one is of low frequency and high amplitude, which is resulted from unstable feeding to the riser and keeps coherent along the axial direction. And the other is of high frequency and low amplitude, which is the result of a variety of factors, such as cluster movement, gas-solid interaction and gas velocity fluctuation.
Physical Simulation on Chill of Thick Walled Ductile Iron Casting for Spent-Nuclear-Fuel Container
Authors: Wang Li Ping , Guo Er Jun , Jiang Wen Yong , Feng Yi Cheng , Yao Xiu Rong , Ren Shan Zhi
Published: June 2012

Forced cooling measures need to be adopted in order to ensure the thick walled ductile iron casting solidification within the stipulated time. In this paper, the thick walled ductile iron casting for spent-nuclear-fuel container is used as the research object. The technology of outside mold has been identified in the actual production process. Through physical simulation experiment, the thickness of the outside the chills can be determined, and the cooling effect of chills is verified. The results show that cooling conditions have a decisive effect on the eutectic solidification, the residence time of eutectic platform and the time of casting solidification.
Finite Element Analysis of Thermal Field of the Barrel Clamp
Authors: Wang Feng Hui , Li You , Sun Hua
Published: June 2012

Barrel clamp is widely used in metallurgy factories to convey steel barrels as specialized holding equipments. It is baked by barrel under high temperature during in working time, which will cause unfavorable effect to the performance of the clamp parts, especially hydraulic system. The thermal field of the hydraulic system was analyzed, which will be quantified to really reflect the temperature distribution of the hydraulic system. According to Analysis of the temperature distribution of the hydraulic oil, it can check the rationality of the materials with anti-radiation and heat insulation chosen.
The Influence of Work Roller Diameter on Shape of Strip in Stainless Steel Cold Strip Rolling Process with Numerical Simulation Method
Authors: Dong Li Li , Xing Shu Qing , Ma Yong Lin
Published: June 2012

In order to study the effects of work roller diameter on shape of strip in cold strip rolling process, the ANSYS/LS-DYNA software was employed to simulate rolling process of 2mm thickness stainless steel. It is found that the average of stress decrease along with the increasing diameter of the work roller.But this variation is about 1%.The stressstrain curve go more steady and the shape of strip become better along with the decreasing of the work roller diameter. In this paper the three kinds of rolling process will produce tiny waves edge. The waves edge was the most obvious when the work roller diameter is 60mm.
Analysis of Electromagnetic Shielding Effectiveness of Metal Material
Authors: Liu Long Fei , Zhang Qi Shan
Published: June 2012

Due to obvious predominances of airing, daylighting and so on, metallic mesh is widely applied in electromagnetic shielding projects. In this paper, we introduce the EMI technique, which the metal material is applied in shielding the strong electromagnetic wave interference on some frequency region in field space, and analyze the electromagnetic shielding principle of the metal plate and the metallic mesh. The design method and the actual manufacture about the shielding system are also given. The test result shows that the system’s shielding effectiveness is practical and effective.
Based on Rheological to Calculate Anchor Parameter for Foundation Pit
Authors: Suo Xin Wen , Gu Chen Min
Published: June 2012

Pointed to character of rheological mechanics and limited equilibrium method, a new viso-elasto-plastic rheological model is builded with minimum locked load formula abtained.The finite difference method with C++ and inline FISH program ,is applied to analyze engineering instance. Based on calculated results and testing on spot, plentiful key parameters on whole bonged and prestressed bolt is studied.Lastly,the conclusions are open out ,including minimum locked loading,stress and maximal axial distribution of prestressed steal, hump distribution of shear stress on grount,shear strain rate of surface and displacement of reinforced foundation pit and so on.The numerical calculation is coincident with testing factors.
Finite Element Model Analysis on Five-Cylinder Marine Diesel’s Crankshaft Based on UG and ANSYS
Authors: Luo Jun , Sun Jie , Yuan Guang Jie
Published: June 2012

Ship host is the heart of one ship, while the crankshaft is the core components of ship host. Created a three-dimension crankshaft’s modal through UG, then use FEM software ANSYS to simplified the characteristics details and constraints. Take the modal analysis of the crankshaft in order to gain the natural frequency and mode shapes).
Preparation and Testing of Polylactic Acid Ultra Thin Fiber Membrane as the Sustained Release Material
Authors: Yu Jian Xiang , Liu Tai Qi
Published: June 2012

In his paper, polylactic acid ultra- thin fibers membrane carried rifampicin were prepared by electrospinning technology, and release experiment of polylactic acid super thin fiber membrane with rifampicin were carried out in PBS solution. The resulted ultra-fine fibers membrane of polylactic acid membrane were characterized through scanning electron microscopy to decided the morphology, the results showed that the drug-loaded polylactic acid membrane contained microfiber in a range of 1μm-8μm in diameter; polylactic acid fiber diameter distribution was affected by molecular weight of polylactic acid, concentration of polylactic acid, quantity of drug loaded and spinning parameters such as voltage, the average fiber diameter increased when improved the mass fraction of PLA solution, the diameter of PLA ultra-fine fibers loaded rifampicin was thiner than PLA ultra-fine fibers. The performance of controlled release in phosphate buffer solution (PBS) was detected by UV, and their delivery rate was calculated by the detected result. The sustained release effect of polylactic acid Molecular with weight of 150,000 loaded rifampicin was better than polylactic acid ultra-fine fibers with the molecular weight of 100,000, the addition of lipase can improve release rate of rifampicin.
Structural Strength Analysis of Special Dynamic Calibration Equipment for Artillery Chamber Pressure Testing System
Authors: Zhang Hong Yan , Zhang Yu , Zu Jing
Published: June 2012

The dynamic calibration of artillery chamber pressure testing system under simulating application environment is an important means to ensure the measurement accuracy. Dynamic calibration device can simulate the testing environment with high temperature and high pressure in the artillery chamber. The main body of the calibration device is the key part to withstand instant high temperature and high pressure. In the paper, the structure strength of the main boy of the calibration device is theoretically analyzed and systematically calculated, and the stress of it is calculated by the finite element software. Simulation and analytical results indicate that the main boy of the device can withstand pressure of up to 8000bar. Finally, it is verified by the experiment and the results that the structural strength is accord with the design.
Basic Research of Crank-Group Driving Mechanism
Authors: Cao Ju Jiang , Wang Yu Qi , Sun Ji Wei
Published: June 2012

This paper put forward a kind of crank-group driving mechanism on the basis of parallelogram mechanism , introduced its concept, design process, and analyzed the feasibility of its movement. It can drive multiple parallel-axis synchronously, and it is a new way of transmission.
Research on the Mechanism of Earthquake Damage of Tunnels
Authors: Zheng Sheng Bao , Jiang Shu Ping , Wang Xiao Wen
Published: June 2012

Many tunnels were subjected earthquake. According to the damaged features of tunnels in earthquakes indoorsand outdoors, the macroscopic damage of tunnels are summarized. On the base of the damage manifestation, the failure mechanism of tunnel damage is preliminarily analyzed. Comparison with the failure mode on the shaking table model test has been made, and some suggestion of on the weak links at the tunnel entrance, faults and shallow buried section for designers has been put forward.
A Green Pre-Film for Carbon Steel by Cerium Salt in Seawater
Authors: Gao Li Li , Zhang Zheng , Wang Wei Zhen , Hou Xiang Yu , Wang Jing , Gao Xiang , Chen Chong , Cui Zhen Dong
Published: June 2012

An environment-friendly pre-film for carbon steel was obtained by using seawater with cerium salt. The influencing factors of cerium salt pre-film were discussed through orthogonal experiments, and the optimum processing parameters were confirmed. Then morphology, composition, the forming process and corrosion resistance of the pre-film were investigated. Analysis by digital microscope showed that the cerium salt pre-film was a blue uniform coating. EDS images displayed that the pre-film consisted of Ce, O and Fe, the major component of the protective layer was a mixture of Ce oxide, Ce hydroxide and Fe hydroxide. The results of electrochemical potentiodynamic polarization and gravimetric measurements indicated that the cerium salt pre-film provided effective protection to the substrate of carbon steel.
Simulation and Analysis of Swing Motion of Lifting Load System on Rescue Vehicle
Authors: Liu Han Ming , Zhao Heng , Li Ning
Published: June 2012

In lifting, remoted operated dive vehicle（ROV） may swing with the effect of wave. Based on the general form of Lagrange’s equation, a 3-DOF nonlinear swing motion kinematic model was set up. The kinematic response was studied using methods of numerical simulation. The results demonstrated that the kinematic response depends on the length of cable, lifting speed and excitation frequency. Conclusions drawn from this work can be used for safety assessment and theoretical basis for lifting ROV.
Grey Relation Analysis on the Influence Factors of Multi-Mode Penetrators Forming
Authors: Wang Jiang Bo , Zhang Qing Ming , Feng Cheng Liang , Li Wei Bing
Published: June 2012

On how to properly choose initiation position and parameters of cavity liner structure of multi-mode penetrator shaping. Combine gray relation analysis with simulation of different ways of initiation and different cavity liner structure, we analyze the effect of ways of initiation, the height of cavity liner, height ratio of cone and thickness of cavity liner on forming parameters of shaped charge. We get the sequence of factors which affect the penetrator molding effect. That is charge initiation position>the height of cavity liner>cone height ratio of cavity liner> thickness of cavity liner, which provide a reference method for optimization design multi-mode warhead.
Simulation of Bicycle Helmet Impact Test Based on the CPSC Standard
Authors: Teng Tso Liang , Liang Cho Chung , Shih Chien Jong , Nguyen Van Hai
Published: June 2012

Bike helmets must meet minimum standards of construction and materials design. This paper focuses on assessment of a helmet based on the shock absorbing test of CPSC’s standard. Computer simulation finite element model is an economical and time-efficient alternative to physical testing. By those compelling reasons, a finite element model of helmeted headform is constructed to serve for development of bicycle helmet technologies. This study performs finite element analyses of helmet impact tests using LS-DYNA software. The linear accelerations at center of gravity of the headform are measured in this simulation. This study implies that the numerical method is a practical approach to helmet design problems. Furthermore, the helmet test model proposed here has potential for guiding the future development of helmet technologies.
An Identification Approach of Dynamic Contact Parameters for Toolholder-Spindle Joint Base on Frequency Response Function
Authors: An Guo Ping , Liu Xin Yu , Zhao Yong Sheng , Cai Li Gang
Published: June 2012

The joint of the toolholder-spindle is the most weakness structure in the system of toolholder-spindle. It affects the manufacturing efficiency and the surface quality of work piece. It is important to identify the dynamic contact parameters for evaluating the connectivity of the toolholder-spindle system. The article introduces an approach to identify the dynamic contact parameters of toolholder-spindle joint base on frequency response function (FRF). Using the BT40 toolholder-spindle system, we can get the dynamic contact parameters curve of toolholder-spindle by the previous approach. The translational and rotational contact parameters can be obtained by sensitivity analysis. By comparing the simulation results with those of experimentation, it can prove the validity of identified dynamic contact parameters. The research results can provide a theoretical basis for the optimization of toolholder.
Conditions for Fractal Dimension Estimate Model of Spatial Objects and a Case Study
Authors: Li Bin , Xu Ming Xia , Xu Yong Long , Li Shi Hang
Published: June 2012

This paper, starting from the concept and definition of fractal dimension, discussed the properties and established the sufficient and necessary conditions of the fractal dimension estimate model of spatial objects such as lines, facets and volumes. Based on the conditions, we put forward a fractal dimension estimate model for linear spatial objects, and verified the rationality and validity of the model for linear objects’ fractal calculation.
Strength Analysis of Solar Sweeper Frame by Using Different Connection
Authors: Xian Yu , Guang Yang
Published: June 2012

Frame of solar sweeper is complexly welded structure with thin steel plate. The finite element method is applied of the frame strength analysis in two working conditions, full-load static and braking state. HyperMesh software is used for analysis of integral and welded frame model. CWELD is created to simulate the welding connection. The numerical results show that maximum stress of integral frame is 60.24MPa, and maximum stress of welded frame is 70.7MPa under full-load static state. The maximum stress different is 14.8% of two working conditions. The frame of solar sweeper satisfy strength requirement under the two working conditions, when the welding connection is considered. And the frame can be optimized by using these results.
Analysis of Stiffness of Viscoelastic-Friction Damper for High-Speed Rotor System
Authors: Li Wen Zhong , Zhang Fu Xiang
Published: June 2012

To reduce the excessive vibration of a high-speed rotor system as it passes its critical speed, a viscoelastic-friction damper(VEFD) are introduced into the support. Its stiffness factor is analyzed. Results show, the stiffness factor decreases with the cone angle increasing among 55-80 degrees monotonically. And it is the same trend when the stiffness of the damping material ring decreases. In the case of friction coefficient among 0.1-0.5, the stiffness factor increases monotonically. So adopted a proper structure, suitably chosen the above parameters and the axial stiffness of the outer-ring, the damper can present appropriate stiffness.
Effect of Sc Doping on Ferroelectric and Dielectric Properties of Bi0.9La0.1FeO3 Thin Film by Sol-Gel Process
Authors: Zhang Xiao Yan , Qi Xi Wei , Qi Jian Quan , Wang Xuan , Chen Huan Huan , Sun Gui Fang , Zhong Rui Xia
Published: June 2012

Pure Bi0.9La0.1Fe1-xScxO3 (x = 0, 0.05, 0.10, 0.15, 0.20) (BLFSO) thin films were deposited on conductive indium tin oxide (ITO)/glass substrates through a simple sol-gel process. The effect of Sc doping on the XRD, microstructure, dielectric and ferroelectric properties of BLFO films was studied. Compared to counterparts of Bi0.9La0.1FeO3 (BLFO) film, the grain refinement of all films is obvious. When the value of Sc is 0.15, the double remanent polarization 2Pr is effectively enhanced with the extreme value of 17.7µC/cm2. The dielectric constant exhibits a trends of increase firstly and then decrease with the increase amount of scandium level.
Devising Mission Environment Simulation Agent of Materiel System
Authors: Shen Ying , Cao Jun Hai , Wu Wei , Ni Ming Fang
Published: June 2012

It sets up the system structure model of materiel system reliability simulation based on Adaptive Agent in the paper, emphasizes the mission-oriented reliability impact model and the devising thinking on MA, which helps to mission environment-oriented reliability analysis.
The Elastic Suspension Design Based on Optimized Design of Simulated Annealing Complex Method
Authors: Huang Wei Hua , He Yu Peng
Published: June 2012

As the global properties of traditional optimization algorithm was weak, the local solution of it appeared easily.The simulated annealing algorithm’s cooling rate was slower and he local searching ability was insufficient. Use the simulated annealing compound method that is combined of the simulated annealing algorithm and compound method. Research the optimization design of elastic suspension with the genetic compound method and compare with the traditional optimization methods. The results show that the algorithm is correct and effective in solving multi variable and constraint optimization problem of elastic suspension.
Modeling & Optimization of Surface Roughness & Vibration Amplitude in Heat Assisted End Milling of SKD 11 Tool Steel Using Ball Nose Tool
Authors: Amin A.K.M. Nurul , Saad Muhd Hafiz B. Md. , Arif Muammer Din
Published: June 2012

Tool steel - SKD 11 is frequently used in industries for making dies and molds. This grade is chosen for its toughness, strength, and hardness maintained up to high temperature. However, the same properties make the steel extremely difficult and expensive to machine using conventional approaches. Heat assisted machining has been found wide spread application in recent years to improve machinability of difficult-to-cut materials. This research paper presents the outcome of an investigation on heat assisted end milling of SKD 11 conducted on a vertical machining center using ball nose coated carbide inserts. The Design of Experiments (DoE) was done using the Response Surface Methodology, in order to develop empirical mathematical models of surface roughness and vibration in terms of cutting speed, feed, axial depth of cut, and heating temperature. The models were checked for significance using Analysis of Variance (ANOVA). 3-D response surface graphs of the interactions of primary cutting parameters with the responses were plotted. Optimization was then performed by using the desirability function approach. From the graphs and optimized results it was concluded that the primary input parameters could be controlled in order to reduce vibration amplitude and produce semi-finished machined surfaces applying induction heat assisted technique.
Design and Simulation Analysis of Transmission Mechanism for Oil Press
Authors: Yang Yang , Ma Shi Bang , Zhang Hong Feng
Published: June 2012

The variable-speed reducer is the key transmission part in the transmission mechanism of oil press, and with the analysis of the transmission plan, the variable-speed reducer of the transmission mechanism is designed according to the performance requirements of the oil press. The simulation analysis is processed by Solidworks, and the simulation results are consistent with theoretical design which meets the requirements of the manufacturing. In practical production and processing, it has very good reference and directive significance.
Finite Element Analysis for the Temperature and Stress Fields of the Diesel Piston Based on CAE
Authors: Sun Wen Fu , Li Xiao Bo , Yu Yuan Ju , Yang Xiao Li
Published: June 2012

Adopting the finite element software ANSYS, this paper calculates the temperature and stress fields of the combined piston under the conditions of cooling and no cooling. The analytical results show that the piston under no cooling condition has higher thermal load and integrative stress than the condition of cooling, because the piston head can’t get better cooling. Moreover, the high thermal load causes the piston head creating great deformation, which has exceeded the normal gap between the piston and the liner, so the piston abrasion may worsen.
Slope Stability Analysis with Finite Element Method
Authors: Liu Jie Qun , Liu Jin Long
Published: June 2012

A slope is studied with limiting equilibrium method and finite element method comparatively. It is found that the results of the two methods are almost the same. The distribution of principal stress, maximal plastic strain, plastic zone, lateral displacement, vertical settlement and incremental of displacement can be investigated by FEM effectively, which make it easy to expediently choose the method of slope reinforcement and the position of strengthening.
Finite Element Analysis for Stereo Shelves Based on ANSYS
Authors: Xie Yun Fang , He Wei
Published: June 2012

The finite element method was carried out three-Dimensions analysis of the solid shelves, gained the deformation characteristics and stress distributions of the solid shelves. Finite element analysis software ANSYS was used to analyze the solid shelves from the static. We have the results after correct loading and constraint and stress values comparison. A simulation example for three-dimensional shelves is presented to illustrate the effectiveness of the finite element analysis method.
Stress Study of Membrane Flapping Wing Based on Mooney-Rivlin Model
Authors: Yu Chun Jin
Published: June 2012

The stress change of membrane flapping-wing aerial vehicle that used Moon-Rivlin model was calculated in one flapping cycle. One flapping cycle was divided into twelve segments, aerodynamic force and inertia force in each segment were calculated, the stress distribution could be gotten. The results show that: at the beginning of upstroke and at the beginning of downstroke, the stress of flapping-wing is maximum; the stress of downstroke near the flapping symmetry position is minimum, and the stress of upstroke near flapping symmetry position is another minimum peak stage.
Design and Research on Aluminum-Plastic Trunk Lid
Authors: Yu Duo Nian , Gu Li Yang , Lu Chong Yang
Published: June 2012

Abstract: In this paper, the traditional trunk lid was analyzed using finite element method firstly, and then the basic mechanical properties of the lid were obtained, which were used as the topology optimization constrains of the trunk lid outer panel, then the aluminum alloy frame structure that could satisfy the static mechanical stiffness properties was designed; According to the requirement, the trunk lid inner panel was redesigned, the material properties determined in advance were given to the inner and outer panel respectively, after being assembled, the best panel thickness could be obtained by ways of size optimization. Compared to the analysis results, the new aluminum-plastic structure can meet the requirements in performance, and has significant effect on light-weight. This paper provides some reference for the development of the aluminum-plastic structure of the body design method.
Investigation of the Local Stress in the FCC Unit (Reactor Riser) Using FEA
Authors: Hong Dong Pyo , Choi Namr Young , Kim Hyun Sik , Li Zhao , Lee Ilteck , Seo Jin Ju
Published: June 2012

According to the recent rise in oil prices, interest in FCC Unit (Fluid Catalytic Cracking Unit) energy recycling is increasing. FCC Unit is a facility which refineries low-valued bunker C oil into high-valued gasoline. Pressure vessel that refines crude in FCC Unit needs vary interpretation because it operates in high-temp and press. Even our concern about this FCC Unit is increasing, our experiments about its safety is not enough. In this paper, whether FCC Unit has structural stability or not, we found out FEA(Finite Element) after trying 3D modeling by using FCC Unit’s condition of design and critical stress as a translating data. We conducted our structure prediction of fragile sites. And stress analysis was performed. Finally, we strengthened on the weak point and tried reinterpretation to bring both of simple measurement and increase of structural stability. Data of pressure vessel follows ASME, and we made an assessment through this standard.
Discrete Particle Swarm Optimization Algorithm for Lot-Streaming No-Wait Flow Shop Scheduling Problem
Authors: Yang Lin , Pan Yu Xia
Published: June 2012

This paper proposed discrete particle swarm optimization(DPSO) algorithm to solve lot-streaming no-wait flow shop scheduling problem(LNFSP) with the objective of the maximum completion time. The natural encoding scheme based on job permutation and newly-designed methods were adopted to produce new individuals . After the DPSO-based exploration, a efficient fast local search based on swap neighborhood structure is used to enhance the exploitation capability. Simulation results show the effectiveness of the proposed algorithms.
Monte-Carlo Modeling of Grain Growth of Plain Carbon Strip Steel Q235 during Heating Process
Authors: Ma Hong Yan , Mo Chun Li , Du Shou Peng
Published: June 2012

The grain growth kinetics of Q235 during reheating process was studied with Monte Carlo (MC) simulation. Heating process was performed at 1223K, 1273K, 1323K, 1373K, 1473K and 1523K for 10s, 20s, 40s, 80s, 120s, respectively. Samples were tested on Gleeble 1500 thermal simulation tester. The experimental results were analyzed regressively to obtain grain growth kinetics equation. The kinetics equation of Q235 was introduced to MC simulation to simulate the microstructure evolution and compute the average grain size at different step during heating process. MC simulation results showed the grain distribution under different time and the grain growth is in consistent with physical simulation. The simulation results also can help to set processing parameters during reheating of ingot.
The Simulation of RTM Based on FLUENT
Authors: Dong Yin Fei , Jiao Xue Jian
Published: June 2012

RTM is also called resin transfer moulding, it is one of the leading technology in the field of FRP. With the help of FLUENT, a powerful computational fluid dynamics software, we have finished the process simulation of filling the mould. In the process simulation, the flow striker, pressure field and velocity field are clearly showed. And they can describe the process of RTM effectively.
Numerical Calculation of Optical Properties of Linear Nano-Graphite Particles
Authors: Liu Ya Feng , Huang Chao Jun
Published: June 2012

Using the discrete dipole approximation method, the absorption, scattering, extinction efficiency factor and differential scattering cross section of four kinds of nano-graphite particles under different incident angle are numerical calculated, the result shown that the value of the absorption, scattering, extinction efficiency factor and differential scattering cross section of linear nano-graphite particles are symmetric on the incident angle. There are the same variation tendency of absorption and extinction efficiency factor changed with the incident angle, when the incident light parallel with the linear nano-graphite particles, both the absorption and extinction are the strongest, and when the incident light perpendicular the linear nano-graphite particles, both the absorption and extinction are the weakest. The variation tendency of scattering efficiency factor changed with incident angle depended on the number of single graphite and the arrangement of linear nano-graphite particles. The value of differential scattering cross section is the smallest while the incident light parallel with the linear nano-graphite particles, however, the biggest while the incident light perpendicular the linear nano-graphite particles.
Composite-Insulated Boom FEM Analysis for the Application of Aerial Work Platform
Authors: Hong Dong Pyo , Lee Byoungkuk , Park Chan Gon , Hwang Seung Ho , You Seok Jun , Hong Yong
Published: June 2012

Telescopic aerial boom system is used transport the object or can be used to ease working high altitude. Installation of high voltage transmission tower due to urbanization is increasing. Because working on high places such as wiring Operations and electrical maintenance has increased the demand. Boom of aerial work platform are made of steel. So, necessity for safe isolation aerial work platform used for electrical work is increasing. This paper is proposed about applied to the material used in the aerial work platform boom. Insulating material was applied to the aerial work platform the last end boom in boom system. In this paper aerial work platform boom is characterized by apply insulating material and lightweight through self-load reduction and isolation. In this paper analyzes the design of the telescopic aerial boom system of applying the insulating material using the ansys. Then design was verified through comparison of the insulation telescopic aerial lift system and Mass-produced existing telescopic aerial boom system.
Numerical Simulation on Deposition and Solidification Processes of a Molten Metal Droplet Generated by Drop-on-Demand Jetting
Authors: Wang Peng Yun , Li He Jun , Qi Le Hua , Deng Hai Liang , Zuo Han Song
Published: June 2012

Droplet deposition and solidification is vital to dimensional accuracy and mechanical properties of components prepared by uniform droplet spray (UDS) forming. In this paper, a volume-of-fluid (VOF) based model was developed to study the deposition and solidification processes of a 1 mm Al-4.5%Cu droplet generated by drop-on-demand jetting. The effects of droplet falling velocity (0.6-0.8 m/s), initial temperature (933-973 K), and substrate temperature (300-473 K) were investigated. The results show that the final morphology of the deposited droplet is largely dependent on falling velocity and substrate temperature. The solidified droplet obtained from an UDS experiment validates the numerical simulation.
The Stamping Process Simulation of Plate Using CAE Technology
Authors: Yu Li Ming , Chen Xi Liang , Yang Yang
Published: June 2012

Stamping process of sheet metal is widely used in the automobile industry. How to improve the quality of plate molding is a challenge for stamping process workers. With the development of the numerical analysis method and the computer technology, Computer Aided Engineering (CAE) technology is widely applied in the industrial areas. As the CAE technology comes up, a qualitative change has happened in the stamping process of automobile sheet metal parts. This paper presents one stamping process simulation of auto rearview mirror installation plate by using the software DYNAFORM.
The Numerical Simulation Analysis of the Straightening Process of the Large H-Shaped Steel
Authors: Chen Lin , Tong Wei , Li Hao , Liu Yu Yan
Published: June 2012

A solid model and finite element model of nine-roller constant roller spacing of large H-shaped steel were set up, researching the problems of elastic-plastic deformation in straightening simulation for nine rollers continuous straightening process of large H-shaped steel. Through analyzing the stress and strain relation of large H-shaped steel, and analyzing the residual stress of H-shaped steel in the straightening process, a theoretical basis for the further step analysis the residual stress control after the H-shaped steel straightening was established.
Realization of High Angle of Attack Simulation Based on Cylindrical Projection System
Authors: Wang Jun , Zheng Yong An , Shi Zhong Ke
Published: June 2012

Geometrical calibration is one of the key technologies for multi-channel projection system. In consideration of the complexity and cost of existing correction methods which need camera to collect the feedback images, another algorithm was proposed to correct geometrical distortion. Firstly, the pixels of the uncorrected image were mapped to the cylindrical screen with equal-arc length method. Then the correction of the geometrical distortion was realized by transforming the pixels on the cylindrical screen to the 2D coordinate of pre-corrected image according to perspective projection. Combined with simplified edge blending method, this system completed the high-angle-of-attack flight simulation based on two-channel projection and could be a platform for high-angle-of-attack flight test and flight accident reconstruction.
Milling Force Modeling of Formed Milling Cutter for Turnout Processing and Experiment Validation
Authors: Cai Li Gang , Pu Fang Yuan , Zhao Yong Sheng
Published: June 2012

Turnout is one of the key components of high-speed railway, which directly affects the maximum lateral allowable speed. The formed milling cutters are usually used in the processing of turnout, and the milling force is an active factor in the milling process which affects the functions of the machine tool and the enactment of process parameters, then the processing quality of turnouts is affected. In the paper, the theoretical milling force model for formed milling cutter is built based on the theory of metal cutting, and the working profile of curved switch rail is chosen as processing object in the milling process experiments, the validity of the milling force model is verified, The study results will provide theoretical basis for tool machine design and process parameters selection, and ensuring the processing quality of turnout.
Stress-on-a-Surface Method and its Application in Stress Classification of Nozzle-Cylinder Intersection
Authors: Dong Jun Hua , Tang Hui Yong , Gao Bing Jun
Published: June 2012

According to the expansion trend of plastic area, the locations and extension direction of five stress classification surfaces are determined in the danger position of nozzle-cylinder intersection. Through the orthogonal experimental design, the structure dimensions of 32 models of nozzle-cylinder intersection are determined. With the area where 0.2% plastic strain intensity occur being designated as the scope of the stress classification surface, extension length of these computation models can be obtained by FEA, and the empirical equations of extension length and structure dimensions are given by using the multivariate regression analysis method. Then all of the stress components are linearized and classified, based on a method of linearizing stresses on a curved surface( stress-on-a-surface method)suggested in this paper. At last, the limits of kinds of nominal stress intensities are taken as the stress criteria of the nozzle-cylinder intersection. The results show that, in the range of parameters for calculation, stress criteria vary with locations and their minimum is that the primary local membrane stress intensity SII is less than or equal to 1.5 times design stress intensity Sm and the primary membrane plus primary bening stress intensity SIII is not more than 1.5times Sm.
Boolean Operations for the Simulation of Machining Processes Based on the CSG Modeling Technique
Authors: Li Bai Chun , Zhang Xue Wei , Geng Lei , Yu Tian Biao , Wang Wan Shan
Published: June 2012

The simulation of computer numerically control (CNC) machining process is an important component of CAM, it can check errors and enhance the automation of machining process. In order to realize the material removal simulation of machining process through VC++ and OpenGL, this paper does the research on the Boolean operations based on the Constructive Solid Geometry (CSG) modeling technique. Firstly, this paper introduces the CSG technique, especially the creating complex object from simple primitives by the operations of Boolean algebra and the frame buffer. Then this paper achieves the solid modeling of cutter and stock through VC++ and OpenGL, and does the research on the theory of cutter’s swept volume generation. In terms of the theory, a cutter’s swept volume is created. Finally, the Boolean difference operation of a stock and the cutter’s swept volume is realized, and the code is also given.
Computational Analysis of Substitution Effects on the Electronic Properties of the Carbazole Derivatives
Authors: Yang Fan , Chen Bo Wei
Published: June 2012

The substitution of carbazole with alkyl chains on the bay regions led to excellent semiconductor carbazole derivatives. In the present paper, we investigated the motion of HOMO and LUMO due to the substitution effects utilizing the density function theory (DFT). The computational results were in the good accordance with the experimental UV-vis spectra. Additionally, the Fukui function was employed to predict the chemical activites of various atoms of the derivatives, which exhibited distinct nucleophilic reaction regions.
A Contrastive Analysis of the Crashworthiness between 22MnB5 and DP590 Front Bumper Inner Plates
Authors: Zhao Yi Ming , Xie Hong , Lin Jian Ping
Published: June 2012

The front bumper inner plate was researched based on contrastive analysis of the crashworthiness considering using 22MnB5, a typical hot forming AHSS (Advanced High Strength Steel) and DP590, a kind of general high strength steel. In this paper, we contrasted energy absorption, section force, and maximum displacement of the two different front bumper systems in low-speed collision. The analysis shows the front bumper inner plate using hot forming AHSS can improve the crashworthiness of automobiles and make it more balanced and reasonable to transfer collision energy and force. As a result, the maximum displacement of the front bumper system decreases and other parts such as front side rails can be safer. Thus, using hot forming AHSS in designing a front bumper inner plate can improve the passive safety of automobiles.
Prepartion of Stabilized Aluminum Titanate Film via Nonhydrolytic Sol-Gel Route
Authors: Jiang Wei Hui , Jiang Qi Ming , Liu Jian Min , Zhu Qing Xia , Zhang Quan
Published: June 2012

The stabilized aluminum titanate (Al2TiO5) film was coated on the silicon carbide (SiC) substrate via nonhydrolytic sol-gel method (NHSG), using anhydrous aluminum chloride and titanium tetrachloride as precursors, ethanol as oxygen donor, different iron sources as stabilizers, and dimethyl mixed dibasic acid (DBE) with the characteristic of environmental protection and high boiling point as solvent. The phase transformation of modified Al2TiO5 xerogel during heat treatment, the effect of different iron stabilizers on the stabilization of Al2TiO5 film, and the influence of the coating process parameters on film-forming quality were investigated by means of DTA/TG, XRD and SEM. The results indicate that ethanol iron as the stabilizer, Al2TiO5 crystal phase can be formed at 750°C. While the temperature is raised further to 1000°C, Al2TiO5 is stable without decomposition, and has better synthesis effect. Selecting iron chloride, iron sulfate and iron ethanol as stabilizers respectively, only iron ethanol is effective to thermal stability of Al2TiO5 film. The best optimal vertical sliding velocity is 3.75 mm/s.
A New Method to Generate Regular Grids for FDM Simulation
Authors: Li Ri , Zhang Jian Qiang , Shen Fa Tian , Li Fei
Published: June 2012

In the paper, a new method called Boundary Search Method (BSM) for generate regular grids was studied, and the key techniques of BSM were investigated, they are: 1) when searching boundary grids of the solid model described by STL file, to avoid losing grids, a method named Triangle Contraction Searching Method (TCSM) was put forward to get points coordinate to calculate grids No. 2）to get more accurate boundary mesh, a vector method was given to judge and eliminate invalid grids. 3) After identifying all boundary grids, for getting inner grids of the shape, an algorithm called Outer Seed Grid Method (OSGM) was put forward. Finally, two examples were given to show the validity of our principle.