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Science china(Technological Sciences) 2008年第11期51卷 1843-1849页

作者： LI MeiYa1,2, PEI Ling1, LIU Jun1, YU BenFang1, GUO DongYun1, SUN XiaoHua3 & ZHAO XingZhong1,2 1 Department of Electronic Science and Technology, school of Physical Science and Technology, Wuhan university, Wuhan 430072, china 2 Key Laboratory of Acoustic and Photonic material and Device of the Ministry of Education, Wuhan Uni- versity, Wuhan 430072, china 3.school of mechanical and material engineering, china three gorges university, yichang 443.02, china Department of Electronic Science and Technology School of Physical Science and Technology

Ferroelectric Bi3.25La0.75Ti3O12 (BLT) and Bi3.15Nd0.85Ti3O12 (BNT) thin films were fab- ricated on Pt/TiO2/SiO2/Si (100) substrates by a modified sol-gel technique. X-ray diffraction indicated that these films were of single phase with random polycrystal- line orientations. The surface morphologies of the films were observed by scanning electron microscope, showing uniform, dense films with grain size of 50―100 nm. Well-saturated hysteresis loops of the films were obtained in metal-ferroelectric- metal type capacitors with Cu top electrodes at an applied voltage of 400 kV/cm, giving the remanent polarization (2Pr) and coercive field (2Ec) values of the films of 25.1 μC/cm2 and 203 kV/cm for BLT, and 44.2 μC/cm2 and 296 kV/cm for BNT, re- spectively. Moreover, these capacitors did not show fatigue behaviors after up to 1.75×1010 switching cycles at the test frequency of 1 MHz, suggesting a fatigue-free character. The influences of the La3+ and Nd3+ doping on the properties of the films were comparatively discussed.

关键词： bismuth oxides ferroelectrics fatigue sol-gel technique

Tribological Properties of PVA-H Composites Reinforced by Nano-HA Particles

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Journal of Wuhan university of Technology(materials Science) 2007年第3期22卷 490-493页

作者：吴刚 school of mechanical engineering Shanghai Jiaotong University

The friction and wear behaviors of tribological mechanical components were studied on a four-ball tester under dry conditions, and the wear mechanism was analyzed by observed worn surface using a scanning electron microscope （SEM）. It was found that the friction and wear properties were improved by the addition ofnano HA particles. The composite containing 1 wt% nano HA had the optimum friction coefficient. It is also found that the addition of nano HA increases the wear resistance of oure PVA-H and PVA-H composites.

关键词： articular cartilage composites wear friction coefficient corrosion-abrasion

Anisotropic damage coupled modeling of saturated porous rock

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Science china(Technological Sciences) 2010年第10期53卷 2681-2690页

作者： LU YingFa1,2, WU XinXing1,2 & SHAO JianFu3 1 Key Laboratory of Geological Hazards on three gorges Reservoir Area, Ministry of Education, china three gorges university, yichang 443.02, china 2 school of Civil engineering, Wuhan university, Wuhan 430071, china 3 university of Sciences and Technologies of Lille, Lille 59655, France Key Laboratory of Geological Hazards on three gorges Reservoir Area Ministry of Education China Three Gorges University school of Civil engineering Wuhan University university of Sciences and Technologies of Lille

It is widely acknowledged that the natural rock mass is anisotropic and its failing type is also non-isotropic. An orthotropic elastic damaged model has been proposed in which the elastic deformation,the damaged deformation and irreversible deformation can be identified respectively. A second rank damage tensor is employed to characterize the induced damage and damage evolution related to the propagation conditions of microcracks. A specific form of the Gibbs free energy function is used to obtain the effective elastic stiffness and the limited scopes of damage parameters are suggested. The model’s parameter determination is proposed by virtue of conventional tri-axial test. Then,the proposed model is developed to simulate the coupled hydraulic mechanical responses and traction behaviors in different loading paths of porous media.

关键词： anisotropy damage modeling saturated rock tensile failure

Case Based Reasoning Intelligent System for Network Computer Aided Process Planning

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武汉理工大学学报 2006年第S3期28卷 1077-1080页

作者： ZHAO Chunhua WU Zhengjia ZHOU Chengjun ZHU Dalin LI Haoping school of mechanical and material,china three gorges university,yichang 443.02,china, school of mechanical and material China Three Gorges UniversityYichang 443002China

Computer aided process planning system played a key role for integrating design and manufacturing or assembly systems properly considering available resources and design *** take advantage of the enterprise resource,the web CAPP framework was *** based reasoning and multi agent system were integrated in the *** multi agent mecha- nism was discussed in the *** an instance of case base was *** made the system run independently and contin- uously in the network environment of process planning problems.

关键词： computer aided process planning multi agent system case based reasoning

Effect of Curing Procedure on the Properties of Copper-Powder-Filled Conductive Adhesives

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Journal of Wuhan university of Technology(materials Science) 2008年第3期23卷 323-325页

作者：郑小玲游敏 College of mechanical and material engineering China Three Gorges University

By means of testing the shear strength with single lap joint, measuring electrical resistivity for cured products and the curing strain with strain gauges, the effect of cure parameters on the properties of HT1012 conductive adhesive filled with copper powder was investigated, and the residual stress in the conductive adhesives was also estimated. The experimental results show that the properties such as shear strength of the adhesives, electrical resistivity of products as well as the residual stress of cured HT 1012 copperfitted conductive adhesive were evidently affected by curing temperature and time. The diagrams of scanning electron microscopy （SEM） and Fourier transform infrared （FT-IR） were also used to determine the properties. The higher mechanical property was achieved under the condition of curing the adhesive 3 h at 60 ℃ as the density of the hydrogen links or linkages existed in the adhesive was relatively higher and the lower electrical resistivity occurred at 80 ℃.

关键词： conductive adhesives epoxy copper-powder-filled curing procedure

Preparation of Reactive Powder Concrete Using Fly Ash and Steel Slag Powder

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Journal of Wuhan university of Technology(materials Science) 2010年第2期25卷 349-354页

作者：彭艳周 College of Hydraulic & Enviormental engineering China Three Gorges University Key Laboratory for Silicate materials Science and engineering of Ministry of Education Wuhan University of Technology

To decrease the cement and SF content of RPC by using ultra-fine fly ash （UFFA） and steel slag powder （SS）, the effect of these mineral admixtures on compressive strength of RPC were investigated. The experimental results indicate that the utilization of UFFA and SS in RPC is feasible and has prominent mechanical performance. The microstructure analysis （SEM and TG-DTG-DSC） demonstrated that the excellent mechanical properties of RPC containing SS and UFFA were mainly attributed to the sequential hydration filling effect of the compound system.

关键词： ultra-fine fly ash steel slag powder reactive powder concrete sequential hydration microstructure strength

Study of Product Conceptual Design Based on Independence Axiom and its Application

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Study of Product Conceptual Design Based on Independence Axi...

Corrosion Fatigue Behavior of Duplex Stainless Steel in 3.5% Sodium Chloride Solution

2011 IEEE 12th International Conference on Computer-Aided Industrial Design & Conceptual Design

作者： TIAN Qihua DU Yixian TAO Ran ZHANG Haiyang College of mechanical and material engineering china three gorges university yichang china

＜正＞Based on the basic theory of Axiomatic Design（AD）, the essential characteristics of transforming functional requirements into behavior descriptions in conceptual design are primarily *** model that governs design process is given on the basis of the analysis of mapping principles in AD and the characteristics of conceptual *** paper presents the whole process of conceptual design applying AD in *** to the proposed conceptual design model,a box-type pressure filter is used as an *** functional requirements of the box-type pressure filter are implemented by some concrete structure designs and then a reasonable conceptual design scheme with theoretical basis is obtained.

关键词： Axiomatic Design Independence axiom Conceptual design Box-type pressure filter

来源： cnki会议评论

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Journal of university of Science and Technology Beijing 2001年第2期8卷 133-136页

作者： S. H Abubakir, Yinshun Wu, Baofeng Ding, Jiuqing Li Bei Cao (material Science and engineering school, university of Science and Technology Beijing, Beijing 100083, china) material Sci. and engineering school University of Science and Technology Beijing 100083 China

The corrosion fatigue behavior of duplex stainless steel (DSS) was studied at different cyclic stress levels in 3.5%NaCl (mass fraction, so as the follows) solution (pH=7) at 50 degreesC. The results showed that DSS was susceptible to pitting corrosion and corrosion fatigue. Both intergranluar corrosion cracking and transgranlular corrosion cracking initiated at the bottom of pitting holes. Furthermore, the corrosion fatigue properties of DSS in 3.5%NaCl solution may be relatived to complex electrochemical and mechanical coupling effects between the three phases (austenite, ferrite and martensite), where martensite and ferrite were anodic in the corrosion cell and could be prone to cracking under certain condition.

关键词： corrosion fatigue duplex stainless steel sodium chloride solution

The TDCPR Management Mode of engineering Equipment

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International Journal of Plant engineering and Management 2002年第4期7卷 210-216页

作者： WU Zheng jia, CHENG Tian, ZHAO mei yun College of mechanical & material engineering, three gorges university, yichang, Hubei Province 443.02, P.R.china College of mechanical & material engineering Three Gorges University Yichang Hubei Province 443002 P. R. China

The three gorges Project is a very large project, and its structure is very complex. International advanced engineering equipment is broadly used. The state of equipment running directly influences project building qualities and limited time. According to the factual conditions of the three gorges Project, the characteristics of engineering equipment are analyzed. At the same time, some theories about equipment management are induced, and the TDCPR management mode of engineering equipment of the three gorges Project is put forward in order to gain the aim of managing and using equipment well and speeding up the project construction.

关键词： engineering equipment management mode check preserve repair

Compressive and energy absorption properties of closed-cell magnesium foams

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Rare Metals 2010年第4期29卷 417-420页

作者： JI Haibin,YAO Guangchun,LUO Hongjie,ZU Guoyin,and LIU Letian school of material and Metallurgy,Northeastern university,Shenyang 110004,china school of material and Metallurgy Northeastern University Shenyang China

The quasi-static compressive mechanical behavior and deformation mechanism of closed-cell magnesium foams were studied, and the ef- fects of the density of magnesium foams on the compressive and energy absorption properties were also discussed. The results show that the compressive process of closed-cell magnesium foams is characterized by three deformation stages： linear elastic stage, collapsing stage and densification stage. At the linear elastic stage, the peak compressive strength （t70） and Young＇s modulus （E0） increase as the density increases Magnesium foams can absorb energy at the collapsing stage. In a certain strain range, the energy absorption capacity also increases as the density of magnesium foams increases.

关键词： magnesium foams compression energy absorption closed-cell Young's modulus