bluuebunny/crossref_metadata_2025 huggingface dataset:
Grillage Structural Optimization Based on Genetic Algorithm and Mechanical Direct Calculation
Authors: Yao Xiao Ning , Zhou Yu Long , Zhang Xin Sheng
Published: December 2014

In the process of using the genetic algorithm for grillage structural optimization, direct calculation was applied to grillage structural strength Check. The combination of genetic algorithm and direct calculation can save significant time in optimization design and strength check, at the same time, optimized grillage structure provides more security.And then this structure optimization scheme was programmed by VB with easy interface. The example indicates the program, being reasonable and feasible, proves the combination's superiority.
Study on Mathematical Model of Cylindricality Error
Authors: Chen Li Jie , Wu Hong Chao
Published: December 2014

According to the standard definition of cylindricality error, set up any space surface cylindricality errors of least squares mathematics model. The coordinate origin of the model can be freely selected, nor equal angle interval among discrete sampling points. Analysis by computer simulation, results show that the model developed is right and pratical. On the basis of mathematical models, using four direct algorithm for unconstrained optimization, cylindricality errors can be evaluated in accordance with the minimum conditions. Mathematical models can be used for three-coordinate measuring machine and also available for other intelligent instrument for measuring parts of the cylindricality errors.
A Scalability and Reliability Super Peer Construction Method in Unstructured Distributed System
Authors: Gao Lu
Published: December 2014

It is a large challenge to enhance Super Peer (SP) capability in the unstructured distributed system. The current study of this issue is still focused on how to choose a single peer as a SP based on some standards. Though the selected peer has the certain ability of tolerating the higher load, it is short of Scalability and reliability when the load increases dramatically. In order to improve the SP in these two areas, a new method, which uses Virtual Super Peer (VSP), is proposed. Based on the load in a cluster, one or several peers are selected as a SP. During running the system, the number of peers is dynamically adjusted as the load change. The experimental results demonstrate the method is effective in enhancing SP’s scalable and reliable performance.
Modern Technology Equipment Maintenance Process Management
Authors: Ma Zi Qin , Wang Tong , Zhao Peng Fei , Peng Chen , Chen Yan An , Shu Zhi Chao , Sun Li , Cheng Qiang , Wei Jiang
Published: December 2014

This paper discussed the basic theory of modern technology equipment maintenance process management according to the domestic present situation, and put forward the concept of maintenance process management, it gave the analysis and discussion on the content of maintenance process management through the process preparation of maintenance, maintenance process and process equipment design, maintenance process quota and process management of the scene, so it can provide theoretical basis for the process management of modern technology equipment maintenance.
The Selection Method of Parts in Product Family Evolution
Authors: Wang Hao Lun
Published: December 2014

In order to solute the problems of selection and improvement of parts when the product family architecture to adapt to the diverse needs, the selection method of parts in product family evolution was proposed herein. The part’s performance and the Matching degree of demand characteristics were analyzed. The parts CSM model in product family was defined and established, the clustering method based on fuzzy C-means (FCM) for parts was used in CSM coupling space of parts. Finally, the wheel loader’s manipulator product family as an example was employed to demonstrate the feasibility of the proposed method.
A Study on Approch Method of the Manufaturing Informatization for Semi-Companies
Authors: Jung Moon Ho , Park Jaiil
Published: December 2014

In this study, we introduce new methods to informationize small-sized enterprises to strengthen their competitiveness. First, we examine SME information management Status and analyze why small businesses are not informationized. There are some problems why small businesses are not informationized. With those problem, we think about the application developing method of an individualized approach to cell unit and LEGO-style modular ICT method. Also we conduct these method to verify their effects and advantages in the real case. That practice results in lower cost, better effects and advantages than existing methods, especially for the sustained utilization. Small-sized business information management will be vitalized by cost reduction of APP development and using former infra instead of extra expert.
Proposed Method for Sustainability Development of Consumable Goods
Authors: Fernandes Pâmela Teixeira , Canciglieri Junior Osiris , Oliveira Sant’Anna Ângelo Márcio
Published: December 2014

This paper presents the findings of research exploring how designers could to evaluate and insert sustainability requirements in product design during the initial stages of the product development process. It describes the process of development of the method for sustainability consumable goods based from a literature review and explores its application in the development of packaging for cosmetic. The results show that the use of the method may be a promising solution for sustainable projects, providing the insertion of the reasoning for the inclusion of product development oriented to sustainability as a complement to traditional project requirements that existing in the models of product development.
Alarm Rationalization Based on Process Mining Techniques
Authors: Kondo Ricardo Eiji , de Freitas Rocha Loures Eduardo , Portela Santos Eduardo Alves , Braga Carmela Maria Polito
Published: December 2014

Industries in general need a reliable system for fault identification and alarm management. The high incidence of alarms can overload the operator, exposing him to conditions that may exceed their ability to perform effective actions, impairing his performance during his workday. In this context, the present paper proposes an approach for alarms rationalization based on process mining techniques. The alarm rationalization is in accordance to the alarm lifecycle management model suggested by ANSI / ISA-18 standard. The aim of this paper is to improve the alarm system through its rationalization, allowing an adequate organization and data layout of the whole set of alarms. Thus, it is expected a better interpretation and understanding of the industrial process. Performance metrics recommended by ANSI / ISA-18 standard are used. Such metrics are used for analyzing a database of alarms coming from an industrial plant. Preliminaries results have demonstrated the feasibility of the present approach. The results show that the use of the process mining technique can provide support on rationalization alarms, standing for a promising method in alarm management domain.
Contemporary Lean Technology and Process Management Theory and System
Authors: Cheng Qiang , Sun Li , Ma Zi Qin , Zhao Peng Fei , Peng Chen , Wei Jiang
Published: December 2014

The Lean technology and process management theory and system were researched. The Lean technology and process management was defined. And the contemporary Lean technology and process management theory system model was proposed. The contemporary Lean technology and process management system platform was set up.
Data Operation of Management Accounting in E-Commerce Enterprises
Authors: Zhou Hang , Yu Yue , Li Rui Qian
Published: December 2014

E-commerce enterprises, as a kind of Internet enterprises, data operation model will be their certain choice. They take information as economic factors and use big data as their strategic resources. Management accounting plays a leading role and indispensable role in e-commerce enterprise data operation. Only change processing information methods of management accounting and integrate its processing information tools and establish Balance Scorecard basing operational strategies of data, management accounting will integrate with big data technologies organically. That will promote efficiency of e-commerce enterprise data operation greatly and improve the strategic development of e-commerce enterprises.
Analysis of Marine Fouling Microbial Communities Adhering to Carboxyl Modified MWCNTs-Filled PDMS Coating Surface during the Initial Stage of Biofouling
Authors: Sun Yuan , Liang Shuang , Zhang Zhi Zhou
Published: December 2014

In this study, a polydimethylsiloxane (PDMS) coating filled with low concentrations of selected carboxyl modified multi-walled carbon nanotubes (cMWCNTs) has been fabricated. The antifouling properties of cMWCNTs-filled PDMS coatings were tested and the diversity level and succession phenomenon of marine fouling microbial communities were analyzed using single strand conformation polymorphism (SSCP) method. Marine adhesion test showed that cMWCNTs-filled PDMS coating presented decent antifouling property. SSCP analysis revealed that fouling prokaryotic species on the cMWCNTs-filled PDMS coating presented high and stable diversity level while diversity and dominance level of fouling eukaryotic species were relatively low, similar to those on PDMS alone and other four antifouling coating surface without nanoparticles, suggesting that the main mechanism by which cMWCNTs-mediated surface nanostructure improves antifouling capacity may have no direct relationship with the patterns in the context of succession dynamics of prokaryotic and eukaryotic microbial communities.
SAPO-34 Zeolites Prepared Using Calcined-MCM-41 as Silica Source
Authors: Zhang Hai Rong , Liu Hong Yan , Bai Pei Wan , Tao Xun , Jiang Yu , Han Shen Hua , Wang Bo , Zhang Wen Shang , Yuan Kai , Guo Yong
Published: December 2014

SAPO-34 molecular sieve was successfully synthesized using calcined-MCM-41 as silica source and morpholine as a template. The influence of MCM-41 content on the synthesis was investigated. The result shows that pure SAPO-34 could be obtained in a wide range of the n (SiO2)/n (Al2O3) ratio in the starting gel. Moreover, increase the n (SiO2)/n (Al2O3) ratio has a negative effect on crystallinity while high silicon incorporates into the framework of SAPO-34. Keywords: MCM-41, SAPO-34, Silicon source,
Improvement of Interfacial Adhesion in PP/PS Blends Enhanced with Polyethylene-Polyamine Surface Treated Carbon Fiber
Authors: Li Jian
Published: December 2014

The effects of surface treatment of a carbon fiber (CF) by Polyethylene-polyamine (PEPA) on the interfacial adhesion behavior and morphology of polypropylene/polystyrene (PP/PS) matrix blends filled CF composites were investigated. Effects of surface treated a commercial CF on mechanical properties are studied. Contact angle was measured to examine the changes in wettability of the carbon fiber. The chemical and morphological changes were characterized by using X-ray photoelectron spectroscopy (XPS). PP/PS/CF composites were fabricated with and without PEPA treatment, and their interlaminar fracture toughnesses were compared. The results showed that the interlaminar shear strength (ILSS) of composites has been greatly improved filled PEPA modification CF. The water contact angle of resin sample decreased 50% after addition of PEPA surface treated CF.
Effects of Indenter Tips of Quasi-Static Indentation Damage of Foam Sandwich Composites
Authors: Ahmed Azzam , Wei Li
Published: December 2014

The behavior of foam sandwich composites subjected to the quasi-static load has been investigated. The results revealed that the indenter tip shapes have an influence on the indentation behavior of the specimens. Failure modes were studied by sectioning the samples at the damage location and observing under an optical microscope. The primary damage mode was found to be the fiber breakage, delamination and foam crack. Knowledge of the damage resistance properties of a sandwich panel is useful for product development and material selection.
Application Explores in Energy-Saving Materials of Water Supply and Sewerage Works
Authors: Xun Ping , Huang Shuai , Liu Ning Bo
Published: December 2014

Combined with author's rich construction experience in water supply and sewerage works, analyzes and explores the background of energy-saving materials in water supply and sewerage works, dissects the situation of China's current energy-saving materials applied to the water supply and sewerage works, and forecasts the direction of the future development of new energy-saving materials.
Comparison of Hot Corrosion Behaviors of Plasma-Sprayed Segmented Structure and Conventional YSZ Thermal Barrier Coatings under a Fused Na2SO4-V2O5 Salt Film
Authors: Wang Yi , Meng Yi Chen , Suo Hongli , Wang Pan
Published: December 2014

A modified YSZ thermal barrier coating (TBC) was prepared by simultaneously depositing two components, NiCrAlY and YSZ, on nicked-based superalloy DZ125 via atmospheric plasma spraying. In this study, the sodium salt was deposited on substrate surface. After being heated at 950°C for 50min, the specimens were cooled to ambient temperature within 10 min. The specimens were recoated after each 10 cycles. Subsequently, the corrosion products were analyzed via X-Ray diffraction and SEM. The results indicated that deterioration of YSZ coating mainly resulted from generation of chemical interaction. Conversely, abnormal growth of TGO and enrichment of molten salt around segmentation crack were not observed in the modified YSZ thermal barrier coating. Moreover, the modified YSZ-TBC exhibited higher thermal resistance than traditional YSZ-TBC in the thermal cycling testing.
Influence of Surface Properties and Pore Structure of High Surface Activated Carbon on Adsorption Capacity of Dibenzothiophene
Authors: Li Zhi Jun , Jin Shuang Ling , Zhang Shi Min , Zhang Hua Feng , Jiang Ning , Cheng Jie Ling , Shao Xia , Jin Ming Lin , Zhang Rui
Published: December 2014

Four activated carbons (ACs) with different properties were heat-treated at 600 °Cfor 3 h and the ACs before and after the treatment were characterized by nitrogen adsorption and XPS. The relationship between pore texture, surface chemistry and dibenzothiophene adsorption capacity was investigated. It is found that pore volume for the pore below 1nm and between 1.1-1.6 nm decreases and increases respectively, and mesopore volume increases after the heat treatment. The Brunauer- Emmett-Teller (BET) surface areas of the four samples remain almost the same after the treatment. The surface oxygen content decreases after the treatment. The adsorption isotherms can be better fitted by Freundlich equation than Langmuir equation, indicating that the adsorption sites on surface of the ACs is inhomogeneous. The dibenzothiophene adsorption capacity has a linear relationship with the pore volume of the pores in the range of 0.536-1.179 nm, indicating that micropore filling of dibenzothiophene is the dominant mechanism for dibenzothiophene adsorption. The adsorption capacity of dibenzothiophene for the pristine ACs is larger than that of the heat-treated ACs under the same pore volume for the pores in the range of 0.536-1.179 nm, indicating that surface oxygen functional groups favors the adsorption for dibenzothiophene.
Preparation and Characterization of Ag-Deposited Silica-Coated Fe3O4 Magnetic Nanoparticles with Recycling Antibacterial Properties
Authors: Xu Peng , Wei Shao , Yang Jing , Che Yi Xi , Cao Xiao Yong , Zhang Rui
Published: December 2014

In this paper, a novel anti-bacterial agent of Ag-deposited silica-coated Fe3O4 magnetic nanoparticles was prepared by a template-activated strategy, which possess a silica coated magnetic core and silver nanoparticles on the outer shell. The as-synthesized nanoparticles have been characterized by transmission electron microscopy (TEM), energy dispersive X-ray analysis (EDX). The obtained products exhibited dispersibility and high magnetization, which also show a good recycling antibacterial activity, and the antibacterial rates against Escherichia coli was all 100 % for 3 cycles.
Study of New Ultra-Temperature Polymer Fracturing Fluid Material
Authors: Wang Sheng Peng , Zhao Xian Zheng , Cai Bo , Hua Shen
Published: December 2014

Nowadays, hydraulic fracturing has become the mainly treatment in low permeability reservoirs.Niudong buried-hill was located in the Baxian Sag of the Bohai Bay Basin. The charactristers of this natural reservoirs are summarized as :low porosity and ultra-low permeability ;complex storage types and complex fracture break and with ultra high temperature (200-210°C) ,In the past, 150°C fracturing fluid system was used in order to solve fluid fracturing efficiency low, quick acid rock reaction.Field test shown that it can’t meet target of greatly improve the output. So it is necessary to develop a novel fluid system to achieve high-efficient stimulation. Therefore, this paper invented a new high temperature resistant ternary anionic thickener, and launched some fracturing fluid performance evaluation.The novel high-temperature fracturing fliud provides a new material to stimulate ultra-high temperature, ultra deep formation to help maximize recovery efficiency. it has important strategic significance for exploration promotion of ultra-high reservoirs .
Preparation of PMMA/PP/ PP-g-MAH Alloy
Authors: Jiang Shui Qing
Published: December 2014

Studies of the polypropylene grafted with malefic anhydride PP-g-MAH as compatibilizer to toughening polypropylene PP and PMMA blends. When PP/PMMA fixed ratio of 80/20, the effects of PP-g-MAH content on the blend morphology, mechanical properties and thermal properties. With the increase of PP-g-MAH content, strength and impact strength, tensile strength, PMMA/PP/PP-g-MAH blends were first increased and then decreased, and in the PP-g-MAH for 5 copies and reached the maximum value; while the flexural strength increased. The impact strength of the alloy compared with the alloy without the addition of compatibilizer increased about 30%, the tensile strength, bending strength increase obviously. That PP-g-MAH has effects on the morphology and properties of PMMA/PP/ PP-g-MAH blend system.
Synthesis and Spectral Analysis of Benzene-d6
Authors: Guo Yang Zhen , She Dong Mei , Ning Jun , Mei Xiang Dong
Published: December 2014

The new method for synthesis of Benzene-d6 was discovered. In this process, [Cp*PMe3IrH3][OTf] was used as the catalyst at H/D exchange reaction between benzene and deuterium oxide. The prepared method was in an overall yield of 20% and chemical purity of 99.7%. The product contained stable isotopes at 98% enrichment. The MS spectra, 13C NMR, IR between benzene and benzene-d6 were discussed.
Application of PCA Method to Characterize Strawberry
Authors: Li Li , Li Bin , Zhang Qi , Gong Li Yan , Meng Xian Jun
Published: December 2014

Physical and chemical properties were measured to study quality of 5 strawberry cultivars, which were fruit weight, firmness, vitamin C, total sugar, total anthocyanin, total phenols, pH, total soluble solid, titratable acid, crude protein and juice yield. The result showed that PC1 explained 54.519% of the total variance in the data set, PC2 explained 28.184% and PC3 explained 9.252%. Accumulative variance contribution of these three main compositions extracted by principal component analysis was 91.954%. Eleven properties could reduce to three main components, and five strawberry cultivars were distinguished based on PC scores.
Preparation, Characterization and UV Absorption of Phosphotungstic Acid Cerium
Authors: Yu Hai Lian , Hu Zhen
Published: December 2014

Phosphotungstic acid cerium [CePW12O40] was prepared with phosphotungstic acid and hydrate cerium nitrate by precipitation method. The Fourier transform infrared spectrometer, X-ray diffractometer, X-ray fluorescence spectrometer and thermal gravimetric analysis were used to characterize product, The UV-VIS spectrophotometer was used to measure its absorption capacity. The results showed that the prepared product is CePW12O40, it has good crystal and good thermal stability, its purity reaches 99.55%, there is good UV absorption property between 200nm and 260nm..
Research on Reducing the Degree of COD in Wastewater during Sizing Technology
Authors: Lv Kun Kun , Ji Ying Chao , You Dong Fang
Published: December 2014

For the principle of green sizing, the key research on sizing technology which reduce the degree of COD in wastewater of sizing was carried out. PVA and modified starch slurry was gradually replaced by hemp pole cellulose ether and modified starch slurry, and the original formula was optimized. After valuing viscosity and COD of the slurry, several suitable formulas were chosen. Then experiments on the same batch of hemp/cotton blended yarn sizing were carried out, and the sizing enhancement rate, stretching rate and the increasing grinding rate were tested. Through the comparative analysis, the COD of hemp pole cellulose ether slurry with modified starch is lower than that of PVA slurry with modified starch. Meanwhile, with the certain compound rate, the former sizing performance is better than the later.
Strength Quality Research of Concrete Blended with Solar PV Cells
Authors: Chen Sung Ching , Huang Ran , Hsu Hui Mi , Chang Jia Ruey , Teng Li Wei
Published: December 2014

In the previous article we studied the strength quality of cement paste blended with waste solar PV cells. In this study, the similar research was performed by replacing cement paste with concrete except that a large w/c ratio of 0.55 was set since high permeability or more capillary pores may take a better observation on the experimental results. The conclusions were made on the effect of cement replacement with ground solar cells. The use of ground solar cells on the mechanical properties of cement-based composite was investigated, and as a result, we identified the strength performance for those of concrete specimens.
The Flexural Behavior of Bolted Steel-Concrete Composite Beam
Authors: Kim Do Bum , Choi Byong Jeong
Published: December 2014

The composite beam is efficient and easy for construction. But shear connector is needed for the composite action. This research developed SPC beam in order to reduce the shear connector with utilization of mechanical bond by the cross sectional shape. The flexural behavior of SPC beam was evaluated through two point loading test.
A Study Effect of Shooting 2 Balls in a Ball Swaging Process on Gram Load Parameter Using Finite Element Analysis
Authors: Kheunkhieo Panupich , Tangchaichit Kiatfa
Published: December 2014

The purposes of this research are to explore the baseplate and actuator arm deformation which effect to the gram load which occur in the ball swaging process, the main component determining quality of assembly the head stack assembly with the actuator arm. By shooting a ball though the base plate, the component located on the head stack assembly, the base plate plastic deformation takes place and it in expand in radial direction. The base plate then adjoins with the actuator arm. Using the finite element method to reproduce the ball swaging process, we repeated to study effect of the swage press clamp and velocity. The study done by creating the three dimensionals finite element model to analyze and explain characteristics of the baseplate and actuator arm deformation which effect to gram load which effect to the ball swaging process.
A Way to Reduce Machine Cutting Temperature
Authors: Ma Zi Qin , Chen Yan An , Zhao Peng Fei , Wang Tong , Peng Chen , Sun Li , Cheng Qiang , Wei Jiang
Published: December 2014

High-speed cutting technology has become an important development direction of modern NC machining technology, but the existing equipments are often not suitable for high speed machining. An effective method is proposed in view of the cutting heat in cutting process, by introducing chiller to the existing cooling system, the coolant temperature decrease, tool and workpiece temperature can also reduce, so general machining center can achieve cutting speed as quickly as possible.
Cyclic Oxidation Resistance of Hot-Dipping Aluminized GH169
Authors: Lou Jin , Ruan Cheng Xiang
Published: December 2014

GH169 superalloy steel was coated by hot-dipping in a molten aluminum bath, and then diffusing annealing at 950 °C for 2h. The cyclic oxidation behaviors of the hot-dipped aluminized steel and GH169 were tested at 900 °C for 24 cycles using resistance furnace. Morphology of surface and cross-section, element distribution of the oxide scale were characterized by SEM and EDS. The results showed that protective Cr2O3 and Al2O3 oxide scales were formed on GH169 and aluminized steel after 24 cycles, respectively. The inner oxidation was found on GH169 after 24 cycles. It was composed of surface Al2O3 oxide film, outer Al-rich layer scattered with NiAl phase, and inner NiAl layer on aluminized steel after 24 cycles at 900°C.
Discovery of α-Fe2O3 in the Oxide Film on ELID Grinding Wheel
Authors: Kuai Ji Cai
Published: December 2014

This paper conducted a theoretical study on the generation and transformation mechanism of α-Fe2O3 in the oxide film and an experimental verification of the presence of it. Firstly, the electrochemical process of the generation and transformation of α-Fe2O3 in the oxide film was analyzed, followed by the measurement of the content of it in the oxide film using X-ray diffractometer.
Failure Analysis and Study on Heat Treatment Process of Grate Bars Used in Sintering Trolley
Authors: Li An Min , Ma Ding , Zheng Qi Feng , Chen Ruo Huai , Li Qiang , Huang Zu Jiang , Zhang Zi Jun
Published: December 2014

The as-cast grate bar structure used in sintering trolley is primarily comprised of austenite and eutectic (eutectic austenite and eutectic carbide).The austenite is dendrite, while the carbides are reticular and chrysanthemum-like. The failed grate bar structure primarily consists of ferrite, carbide, martensite and residual austenite; cavity shrinkage and shrinkage porosity exist in the structure, and the fracture exhibits typical cleavage fracture characteristics. The primary means of failure are abrasion and fracture. The secondary carbides precipitated in the sample (quenching (1050°C+2.5h)+ tempering (390°C+2.5h)) and the other one (quenching (1050°C+2.5h)+ tempering (420°C+2.5h) ) are dispersed and refined. Compared with the as-cast one, their relative abrasion resistance performances respectively are 0.8645 and 0.8752.The values of hardness and impact toughness of the samples heat-treated are greater than those of the as-cast grate bar. The optimum heat treatment process is as follows: quenching (1050°C,2.5h) + tempering (390°C~420°C,2.5h)
Manufacturing Process of EP Matrix Composite Rapid Injection Mold and Application Case
Authors: Zhang Yong Di , Zhang Bin , Yue Yan Fang , Yang Guang
Published: December 2014

The prototype can be produced from RP(Rapid Prototyping) technology directly by 3D data model, by dispersing and accumulating layer by layer principle, so the new product development cycle can be shortened greatly. RT (Rapid Tooling) technology is a new method and technology for rapid manufacturing mold, which is developed from RP technology. In this research, a rotary switch prototype was produced by laser stereolithography (SL) technology. Using the prototype as master pattern , a injection mold was made by metal casting method , using the composite composed of epoxy resin E51, aluminum powder, quartz powder , graphite and others, the manufacturing process was described in detail, and the ABS samples were successfully obtained through trial production in the injection molding machine.
Moldflow-Based Optimization Design of Gating System in Injection Mold for Automobile Bumper
Authors: Xu Bin , Rui Zhi Yuan
Published: December 2014

The gating system of an injection mold for car bumper was studied. A design optimization scheme is proposed to optimize both the number and locations of the gates by analyzing the filling process, in order to reduce the part war page and weld line, numerical simulation of injection mold filling process is combined with the design optimization method to find the optimum number of gates and their locations to achieve balanced f low and less weld lines while satisfying the limit of injection pressure. Moldflow software was applied to make analysis and comparison of various gating system in terms of their filling time, injection pressure and clamp force, weld line and distribution of air traps, and an optimized gating system was obtained. The result shows that this method can effectively reduce costs, shorten development cycle and improve the efficiency of molding design.
Experimental Study on Orbital Drilling Force and Machining Quality of CFRP
Authors: Chen Xue Mei , Chen Qing Liang , He Feng Tao , Fan Xi Feng
Published: December 2014

This paper aims to investigate orbital drilling process in carbon-fiber reinforced plastic (CFRP) composites with multi-point orbital drilling tool based on the robot automatic drilling system. One orthogonal experiment has been carried out, and the cutting forces of different parameters were measured online by dynamometer. Furthermore, the cutting force model was established through regression analysis, and the impacts of cutting parameters on thrust force were deeply analyzed. In addition, delamination and tear defects were inspected respectively, and the relationship between thrust force and delamination and tear was discussed. Our results indicate that thrust force increased with the increasing feed rate and axial feed depth, while decreased with the increasing spindle speed. Axial feed depth was found as the predominant factor on thrust force and defects. At last, the cutting parameters was optimized and then thrust force decreased more than 26% with almost none tear and burr around the hole, which indicates a better machine quality.
Effect of Alternating Traveling Magnetic Field on the Removal of Inclusions from Aluminum Melt
Authors: Deng Hong Zhang , Li Qiu Lin , Yang Ding Guo , Liu Wei
Published: December 2014

Alternating traveling magnetic field (TMF) was introduced to agglomerate the inclusions with a density smaller than surrounding melt. Primary silicon particles precipitating from the solidification process of hypereutectic Al-Si alloy was regarded as inclusions need removing. Results indicated that alternating TMF was more effective to promote the inclusions to agglomerate into clusters than downward TMF. The effect of alternating TMF to agglomerate the inclusions increases with the increase of current and frequency. There exists the best alternating time to get the best agglomeration effect. In this study, 10s is the best alternating time.
Effect of Aging Process on Microstructure and Room Temperature Ductility of TB6 Titanium Alloy
Authors: Ye Cui , Zhao Fei , Zhou Fang , Li Ni , Li Jun Shuai
Published: December 2014

Microstructure and room temperature ductility of the TB6 titanium alloy was investigated by varying the aging temperature and the aging time.The results show that, the alloy’s contraction of area increases while the tensile strength firstly increases and then decreases by raising their aging temperature. In general, the ductility of the samples increases and the strength decreases with the increasing aging time. The optimum mechanical properties are obtained by aging at 650 °C for 2 h.
Cell Growth Morphology on Nano-Structured Surface Based on Wetting
Authors: Qin Ge , Li Hao Xue , Ma Meng Die , Li Juan Juan , Deng Ya Fei
Published: December 2014

This paper studied the growth morphology of the cells on the nanostructured surfaces of the bio-electrodes implanted in human patients. A transition model of the cells on those surfaces, which is the W model or C-B model, was deduced according to the effect of the microstructures on the wetting characteristics and the solid-liquid contact angle models of the microstructured surface. According to the contact angle formula of the model of the droplet on the solid surface, the formula was derived to describe the morphology of the ells on the nanostructured surface. The results of the experiments showed the impact of nanostructured to the morphology of the cells. The changes of the cell morphology on the smooth surface and the nanostructured surface showed that the cell morphology was affected by the nanostructures of solid surface, and the growth shape of cell was different when the sizes were different.
Simulation on Wear-Resisting of Biomimetic Brake Disc/Pad Coupling System
Authors: Huang Ying , Sun Shao Ni
Published: December 2014

Based on design dimensions for particular concaves distributed non-smooth surface, the biomimetic brake disc/pad coupling system model is established, and the wear resistant performance of biomimetic non-smooth surface brake disc/pad coupling system is simulated using finite element analysis, then compared with analysis result of smooth model. Result shows the Von Mises stress of biomimetic non-smooth sample is less than that of smooth sample, and the concaves improve the contact stress distribution in the contact area of brake disk and brake pad. Analysis results show that wear resistant performance of biomimetic non-smooth sample is better than that of smooth specimen.
Simulation of Rock Fractures by Monte Carlo Method
Authors: Li Jian Yong , Yuan Guang Xiang , Zhang Yu Min , Huang Zhi Quan
Published: December 2014

Discontinuities have an important influence on deformation and failure of rock mass in practical engineering. It is one of the key issues in modern rock mechanics to investigate geometric characteristics of joints and fractures inside the rock mass such as shape, size, location and direction etc. Based on the deep analysis of the above geometric properties, it is proposed that the stochastic fractures in the rock mass can be simulated with the random numbers generated by the Monte Carlo method. The related algorithm is designed and implemented. The correctness and effectiveness of the algorithm is verified with an example of a project. This will lay a solid foundation to further study the cutting problems of discontinuous rock block systems.
Effect of Atmosphere Proportion and Nitriding Time on Plasma Nitriding of Duplex Stainless Steel
Authors: Ye Wei , Tong Xing Sheng
Published: December 2014

Samples of duplex stainless steel were plasma nitrided at different atmosphere proportion and nitriding time. The hardness and the corrosion resistance of the untreated and various plasma treated samples were characterised by a variety of analytical techniques. The results show that plasma nutriding at low temperature can improve hardness of duplex stainless steel and its corrosion properties at the same time. Declining the atmosphere proportion of ammonia and argon can effectively prevent the nonuniformity of hardness of nitriding layers and extension of nitriding time is conducive to enhance the hardness and thickness of nitriding layer. In addition, the corrosion peoporties of duplex stainless steel nitrided increase when the nitriding time improves, but its corrosion resistance rises slowly after nitriding for 9h.
The Influence of Coating Thickness on the Relative Area of Tribounits Contact
Authors: Ogar Petr M. , Tarasov V.A. , Gorokhov D.B.
Published: December 2014

The contact of a rigid rough surface and an elastic layered half-space which consists of coating with thickness δ1 and the substrate. To determine the dependence of the relative contact area on dimensionless the force elastic geometrical parameter , the discrete roughness model presented by microasperities in the form of equal spherical segments with the height distribution corresponding to the bearing profile curve of the real surface is used. By using the stiffness model of layered half-space, the elastic characteristics for every each contacting asperity are determined. The system of transcendental equations which allow to determine the dependence of the relative contact areaη1 in case of contact through coating layer on the roughness parameters, material properties, coating thickness and applied load is given. The mutual influence of the microasperities is taken into account.
Wear Modeling of Steel Surfaces to the Flow under Pressure of Melts Polymers with SGF
Authors: Florescu Virgil , Capitanu Lucian , Rus Dorin
Published: December 2014

Consequences of the wear processes at screws and barrels of injection machines and extruders for processing of plastics reinforced with short glass fibers, arise after a longer time (10,000 cycles). Because of this they are working that through appropriate modeling attempts on the profits to be obtained in a short time as much information relating to both the mechanisms of wear and its size, so that the effect can be easily confuted in practice. Starting from the idea that the greatest pressure and velocity of composite melted is in the die nozzle, was an experimental nozzle with wear samples of sizes and weights which can be measured with precision as good. For a larger accuracy of measurements, we used a method for radiometric measuring, extremely accurate. Different nitriding steels have been studied as nitriding treatments, as well as some special steels and alloyed steels. Besides these, there have been preliminary attempts made to describe and checking corrosive action of termoplastelor on metals. This was another way of checking the wear testing of the samples semi-cylindrical wear samples, which served to simulate the wear of the top layer of the barrel and screw. The first results showed that wear increases depending on the increased pressure. One of the findings is that in similar conditions of injection, with the same content of glass fiber, polyamide 6.6 produces a wear greater than polycarbonate. It was also found that increasing the concentration of glass fibres increase the surfaces wear of barrels and screws.
Effect of Composition on the Tribological Behaviors of Ceramic-Matrix Friction Materials
Authors: Wang Fa Hui , Liu Ying
Published: December 2014

The steel fiber reinforced ceramic matrix friction material is prepared by nitrogen protection sintering method. The specimens of the three different friction materials containing different content of alumina, clay and potash feldspar are formulated. The friction and wear characteristics are determined by using the XD-MSM constant speed friction tester. The testing results show that the increase of potash feldspar and the decrease of clay content make friction coefficient become more stable and diminish the sensitivity of friction coefficient to the temperature changes. This study also identify that among the three friction materials investigated, the main wear mechanism converts from grain pull-out and fracture wear to adhesion wear and abrasive wear.
Stress Distribution Behavior of Spherical Plain Bearing Fabricated by TiAl-Based Composite Materials Based on the Finite Element Analysis
Authors: Wang Jing , Yang Li Ying , Wang Shou Ren , Xue Guang Ji , Zhou Chang Xiu
Published: December 2014

Spherical plain bearing is a sliding bearing have a spherical contact surface,it can bear larger load and automatically adjusted to the self-alignin. TiAl-based composite material is a material that be used to lightweight spherical plain bearing. The Simulation used the finite element software Ansys for the bearing’s static analysis.The material of outer ring using normal bearing steel, one group used the TiAl-based composite materials as the material of the inner ring, Another group the inner ring material is bearing steel 9Cr18. The law of the stress and strain produced by the two groups is consistent,the deformation of the composite materials is bigger under the same load, its elasticity modulus and density is smaller compared to the ordinary bearing steel,the composite material has the advantages of high specific strength especially in the occasions have strict requirements of the bearing weight.
Research on System Architecture and Fine-Grained Access Control Strategy of Collaborative Development Platform
Authors: Liu Ling , Nie Rong Mei , Chen Ren Yue , Zhou Pei , Jia Rui Lin
Published: December 2014

With 3D Prototype model as its core, collaborative development platform is a closed loop information system focus on the process lifecycle management of requirements analysis、 product design、process design、frock design 、manufacturing execution as well as logistics integrated supporting, issues of system architecture、 information integration and fine-grained access control strategy of collaborative development platform are key research contents in this paper. firstly, a distributed system architecture of collaborative development platform is introduced to achieve flexibility、integration and interoperability. Then information integration solution between collaborative development platform and other information systems based on web service is defined and investigated, an implementation process between enterprise collaborative development platform and enterprise resource planning (ERP) via ontology and web services is presented to demonstrate the feasibility and validity of the proposed information integration solution. Finally, fuzzy trustworthiness-involved role based access control strategy (FT-RBACS) is proposed for collaborative development platform, its formalization expression and numerical algorithm are developed to implement fine-grained authorization management and access control for collaborative development platform.
The Design of Electrical Equipment Fault Diagnosis System Based on Fuzzy Inference
Authors: Zou Feng Hua , Zhang Hong
Published: December 2014

In view of a certain type of electrical equipment whose failure causes and failure is not a one-to-one relationship between signs, this paper established the mathematical model of fault diagnosis adopting the fuzzy reasoning mechanism. At the same time, we designed the system overall scheme of fault diagnosis according to the system of the diagnosis process and realized diagnosis function of system by using vc + + programming language. Through specific examples verify that the system has the ability of fault diagnosis of electric equipment for a certain type.
Influence of Running Shoes Made of Different Materials on Athletes’ Sprint Speed
Authors: Zhang Yuan
Published: December 2014

Running shoes affect athletes’ sprint speed to a great extent, and running shoes made of different materials show different performance. Sprint is a highly explosive sport with great explosive power and great stress on feet, and thus shoes have great impacts on sprint. Based on main materials of current running shoes, this paper discusses about the influence of running shoes made of different materials on athletes’ sprint speed in terms of spike, sole and vamp etc. by athletes’ self-comparison experiment. Results show that athletes will run faster with greater spike friction, better damping effects of sole and better vamp breathability under the same conditions.
The Vibration Model Establishment and Solution of Bending-Torsion-Axial-Swing Coupled the Helical Gear Transmission System Based on Lumped Parameter Approximation Method
Authors: Li Chang , Wang Bing Chen , Li Jun Feng
Published: December 2014

Based on comprehensive considerations the influences of stiffness excitation, deviation excitation, meshing impact excitation, friction of tooth surface, and other kinds of nonlinear factors, it established a nonlinear coupled vibration model of bending-torsion-axial-swing coupled helical gear transmission system by applying the Lumped Mass Method. After transformed the model to dimensionless form, it used Runge-Kutta method to solve the nonlinear vibration model of the system, and then the time domain chart, spectrum chart, phase chart, Poincare chart, and FFT chart were obtained; it discussed the influence of system parameters on its dynamic characteristics.
Dynamic Response Analysis of Submarine Pipeline under Action of Current
Authors: Lei Fan , Deng Yu Lin , Zhao Xiao Hua
Published: December 2014

It’s important to study the vibration characteristic of submarine pipelines under current for reducing the harmful vibration. Research on fluid-structure interaction of submarine pipeline under current was presented. The pressure and velocity distribution of flow field around pipe with different velocity of flow were studied by ANSYS finite element software. The results show that the pipe is under the action of drag force along the direction of flow. The drag force increases with the flow velocity.
Vibration Test and Analysis of No-Tillage Planter on the Maize Stubble Surface
Authors: Liu Yue Qin , Zhao Man Quan , Liu Fei , Dong Shuai , Zhang Xu
Published: December 2014

In order to improve metering accuracy of air suction type no tillage seeder in maize stubble ground operation, the vibration parameters of air suction seed metering device of the machine are tested and analyzed. Using the method of orthogonal experiment, with forward speed, ditching depth, ridge direction as the influence factors by experimental study on vibration characteristics.The results showed that in no tillage corn field conditions,Stubble height 10-30cm, ridge height is 0-8cm, the soil moisture content 19.78%, The soil temperature 12.7oC. Effects of sowing machine vibration frequency spectrum of 3.46-12.30Hz and 33.50-50.50Hz, the two band spectrum reflects the vibration characteristic of planter operation in the field, can be used as indoor and virtual test selection of reference data. The test results show that: the main factors causing vertical vibration of no tillage seeder metering device is 90o ridge direction, i.e. the surface roughness is greater, causing the vibration of no tillage planter seeding device more. The second is a seeding machine forward speed for 7km/h, i.e., no tillage planter work faster, causing vibration the greater. Finally is the sowing depth, the factors and agronomic seeds, soil fertility, soil humidity etc. Agronomic requirements are closely related, for the smaller vibration effect of no tillage seeder metering device.
Effect of Mg Content on Phase Structure and Electrical Properties of (Ba0.97Ca0.03)(Ti0.96-xZr0.04Mgx)O3 Ceramics
Authors: Zhao Gao Lei , Zhao Da Xue , Li Shi Ming
Published: December 2014

The Mg-doped (Ba0.97Ca0.03)(Ti0.96-xZr0.04Mgx)O3 piezoelectric ceramics were prepared by conventional sintering technique. Influences of MgO doping content on the phase structure and dielectric, piezoelectric, and ferroelectric properties were investigated. The XRD patterns suggested that a morphotropic phase boundary (MPB) crossing pseudocubic and tetragonal symmetries occurs at the compositions containing 0.5~0.7 at.% Mg. Because of such transitional behavior, the piezoelectric coefficient (d33), electromechanical coupling coefficient (kp), and remanent polarization (Pr) were enhanced to peak values, 327 pC/N, 37.2%, and 15.79 μC/cm2, respectively. However, the dielectric constant (εr) showed a decreasing tendency with raising Mg content.
Integrated Thermal-Structural Analysis of a Reflecting Optical System with All Metal Components
Authors: Lv Ban , Wang Guo Li , Yang Yu
Published: December 2014

The thermal deformation of reflecting optical system in the ambient temperature affects the system performance greatly. Based on the results of thermal balance test, the paper has made a full analysis to the deformation of reflecting optical system on the high-low temperature using the finite elemernt method,so as to validate whether the optical system meet the requirement of optical image design and temperature. This method can combine the thermal optical analysis and thermal balance test data effectively ,and therefore the most actual thermal optical anslysis model can be obtained to guide the concept and optimization of reflecting optical system.
The Finite Element Modeling and Structure Analysis of Dust Removal Fan
Authors: Han Qian Peng , Peng Bo
Published: December 2014

This paper mainly discussed the process to create finite element model of Y4-68 fan,and also analysis the nature frequency and liner static stress.According to the analysis result to determine the optimized parameters,to prepare for the stage of optimization.