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稀土改性碳纳米管复合薄膜制备及其摩擦磨损性能

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上海交通大学学报 2011年第9期45卷 1310-1314页

作者：孙志永程先华上海交通大学机械与动力工程学院上海200240 清华大学摩擦学国家重点实验室北京100084

利用自组装技术,在玻璃基片表面制备了稀土改性碳纳米管复合薄膜,采用接触角测量仪测量了不同成膜时间下水在薄膜表面的接触角,使用X射线光电子能谱仪分析了薄膜表面稀土元素的化学状态,并运用UMT-2MT型摩擦磨损试验机评价了薄膜的摩擦... 详细信息

利用自组装技术,在玻璃基片表面制备了稀土改性碳纳米管复合薄膜,采用接触角测量仪测量了不同成膜时间下水在薄膜表面的接触角,使用X射线光电子能谱仪分析了薄膜表面稀土元素的化学状态,并运用UMT-2MT型摩擦磨损试验机评价了薄膜的摩擦磨损性能.结果表明:稀土改性后的碳纳米管成功地组装到磷酸化后的氨基硅烷薄膜表面而形成碳纳米管复合薄膜;碳纳米管复合薄膜表现出优异的摩擦磨损性能,在给定试验条件下,玻璃基片表面的摩擦系数由0.70降至0.13.右,并表现出了优异的耐磨性和摩擦稳定性.

关键词：稀土碳纳米管自组装薄膜摩擦磨损性能

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六维并联地震模拟器机构的动力学分析与仿真

上海交通大学学报 2011年第9期45卷 1263-1268页

作者：张建政高峰赵现朝马春翔上海交通大学机械系统与振动国家重点实验室上海200240

基于Newton-Euler法对三向六自由度(6-PSS)并联地震模拟器进行了动力学分析,分析了地震模拟器运动平台与各构件运动参量之间的关系;考虑重力与惯性力的影响,推导了并联机构杆件和运动平台动力学方程,并消去各构件之间的内力,建立了机构... 详细信息

基于Newton-Euler法对三向六自由度(6-PSS)并联地震模拟器进行了动力学分析,分析了地震模拟器运动平台与各构件运动参量之间的关系;考虑重力与惯性力的影响,推导了并联机构杆件和运动平台动力学方程,并消去各构件之间的内力,建立了机构整体动力学方程;基于动力学模型进行动平台各驱动力的数值仿真.结果表明,6-PSS并联机构适用于地震模拟器,所建立的动力学模型能够作为其精确控制的数学模型.

关键词：地震模拟器动力学模型动力学仿真并联机器人

Effects of Ho on the microstructure and mechanical properties of Mg-Zn-Ho-Zr magnesium alloys

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Rare Metals 2011年第2期30卷 131-136页

作者： LI Daquan WANG Qudong DING Wenjiang National Engineering Research Center for Nonferrous Metals Compositions General Research Institute for Nonferrous Metals Beijing 100088 China National Engineering Research Center of Light Alloys Net Forming and state key laboratory of Metal Matrix Composites School of Materials Science and Engineering Shanghai Jiaotong University Shanghai 200240 China

The microstructure and mechanical properties of Mg-Zn-Ho-Zr alloys have been investigated in detail. The grain size of the as-cast Mg-Zn-Ho-Zr alloy was greatly decreased by the addition of Ho, and the grain growth during solution treatment was suppressed by Mg-Zn-Ho phases formed at grain boundaries. These thermally stable Mg-Zn-Ho phases could not completely dissolve into the matrix dur- ing solution treatment, and the strengthening effect of solution-plus-ageing treatment weakened. The addition of Ho can greatly enhance the high-temperature elongation of the Mg-Zn-Ho-Zr alloy, but the increase of high-temperature tensile strength was just a little.

关键词： magnesium alloys holmium rare earth additions heat treatment microstmcture mechanical properties

Optimization of Processing Parameters for Laser Powder Deposition using Finite Element Method

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Journal of Wuhan university of Technology(materials Science) 2010年第5期25卷 832-837页

作者：付垚 state key laboratory of Non-ferrous Metals and Processes General Research Institute for Non-ferrous Metals

In order to investigate the effects of powder materials and processing parameters on thermal and stress field during laser powder deposition （LPD）, a finite element model was developed with the help of ANSYS software. The finite element model was verified by the comparison between the experimental results and computed results. Then LPD processes with different powder materials and processing parameters were simulated by using the FE model. The results show that less difference of thermal conductivity and thermal expansion coefficient between powder material and substrate material produces lower residual stress; higher laser power, laser scanning speed and smaller laser beam diameter can lead higher peak temperature and higher residual stress. The research opens up a way to rational selection of the powder materials and processing parameters for ensured quality.

关键词： laser powder deposition thermal field stress field powder material processing parameters

面向OEM-Supplier模式及信息安全的CAE协同设计网格系统

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上海交通大学学报 2009年第12期43卷 1904-1909页

作者：赵志杰金先龙曹源王建炜上海交通大学机械与动力工程学院上海200240 上海交通大学振动、冲击、噪声国家重点实验室上海200240

针对制造业普遍存在的OEM-Supplier合作模式,提出了基于网格技术的CAE协同设计系统.基于OGSA(Open Grid Services Architecture)标准及国产网格中间件VEGA,建立了网格平台,在此基础上实现了协同设计过程中各参与方的信息安全,以及资源... 详细信息

针对制造业普遍存在的OEM-Supplier合作模式,提出了基于网格技术的CAE协同设计系统.基于OGSA(Open Grid Services Architecture)标准及国产网格中间件VEGA,建立了网格平台,在此基础上实现了协同设计过程中各参与方的信息安全,以及资源的动态共享.该系统构建了一个由OEM和Suppliers以及提供计算资源的计算方组成的用于协同设计的虚拟组织(VO),将各成员在协同过程中的操作封装为Web服务,通过工作流技术组织服务以完成CAE前处理、求解、后处理过程的全生命周期协同.最后,将该系统应用于汽车OEM与汽车座椅Supplier的协同碰撞安全设计实例中,取得了预期的效果.

关键词：计算机辅助工程协同设计网格计算有限元分析

The ACA Reliability in Sealed Electronic Package of Flat Panel Display under Insolated Loads

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The ACA Reliability in Sealed Electronic Package of Flat Pan...

FATIGUE SOFTENING behavior AND ITS THRESHOLD OF COLD STRAINED POLYCRYSTALLINE Cu

2007亚洲显示国际会议

作者： Qiang Guo~(1 2 *) Mei Zhao~3.Lei Xiao~2 1 state key Lab of mechanical System & Vibration Shanghai {3. university Shanghai china 200240 2 General Department china North Vehicle Institute 3.state key Lab of mechanical System & Vibration Shanghai {3. university Shanghai china 200240

＜正＞Reliability of ACA（Anisotropic Conductive Adhesive）in flat panel display is a very important study *** insola- ted load will affect expand of all the materials in ACA of the sealed electronic package,although the effect loads is smaller than that induced by *** the expansibility will give a force to ACA,which will influent the reliability of *** this present paper,reliability of a kind of ACA of flat panel display is considered, it can be obtained that:during insolated period,temperature grads of ACA seem little difference,and more temperature,less thermal ***’s more,the de- scending rate may be a ***,the thermal transient period is the real challenge to ACA’s insolating reliability, though it may be very short time.

关键词： Reliability Flat Panel Display ACA Insolated Loads

来源： cnki会议评论

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Acta Metallurgica Sinica(English Letters) 1991年第2期4卷 129-134页

作者： FAN Quncheng CHAI Huifen TONG Mingxin Xi′an jiaotong university,xian,Chain FAN Quncheng Lecturer Dept.of {3. Sci.and Eng.,Xi′an jiaotong university,Xi′an 71.049

The symmetrical push-pull fatigue tests in load control were carried out for prestrained polycrystalline *** change in mechanical behaviour during cycling was recorded in detail and the effect of various degree of prestraining on saturated behavior and dislocation structure was *** results show that the cyclic saturation state is still history-dependent at low stress amplitude and the dislocation structure after fatigue exhibits an “inheritance” be- *** level of softening was calculated at various load amplitudes and a softening threshold of about 0.43.to 0.45 of the flow stress was *** is the same as that of low carbon *** stages of cyclic processes and their mechanism have been described.

关键词： polycrystalline Cu fatigue softening dislocation

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双线隧道联络通道地震响应的并行数值分析

上海交通大学学报 2011年第10期45卷 1557-1561页

作者：王建炜金先龙王新张伟伟上海交通大学机械系统与振动国家重点实验室机械与动力工程学院上海200240

以上海某大型双线隧道为例,考虑隧道地基的动态接触作用,建立了隧道-联络通道-地基系统的大型三维有限元模型,采用接触均衡的显式并行计算方法在上海超级计算机曙光5000 A上完成计算,解决了计算量大的问题,分析了联络通道处结构及变形... 详细信息

以上海某大型双线隧道为例,考虑隧道地基的动态接触作用,建立了隧道-联络通道-地基系统的大型三维有限元模型,采用接触均衡的显式并行计算方法在上海超级计算机曙光5000 A上完成计算,解决了计算量大的问题,分析了联络通道处结构及变形缝在横向和纵向水平地震激励下的动态响应,结果可为联络通道和变形缝设计提供参考.

关键词：双线隧道联络通道地震响应并行计算三维有限元数值仿真

An universal in-situ phosphating strategy to fabricate high-performance Co2P-based bifunctional oxygen electrocatalyst derived from conjugated polyaniline-phytic acid copolymer

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Rare Metals 2024年第11期 5823-5834页

作者： Wen-Xue Chen Yue Du Li-Na Zhou Zhi-Yi Zhong Zhi-xian Shi Yan Mao Zi-Quan Zhou Hao-Yue Feng Yu Su Hai-Yan Hu Shi Li Dong-Bin Xiong Jian-Qin Zhou Yi-Si Liu Yao Xiao Hubei key laboratory of Photoelectric materials and Devices School of Material Science and EngineeringHubei Normal University College of Chemistry and materials Engineering Wenzhou University Hangzhou Hangyang Chemical and Medical Engineering Lo. key laboratory of Advanced Energy materials Chemistry (Ministry of Education) Nankai University Innovative Centre for Flexible Devices (iFLEX) Max Planck-NTU Joint Lab for Artificial SensesSchool of Materials Science and EngineeringNanyang Technological University

Electrocatalysts play a crucial role in the performance of rechargeable Zn-air batteries（ZABs）,but it is still difficult to produce nonprecious materials with excellent bifunctional oxygen reduction reactions（ORR） and oxygen evolution reactions（OER）.Herein,conjugated polyaniline-phytic acid polymer（pANI-PA） was directly calcined to fabricate Co2P nanoparticles embedded in N,P-doped carbon network composites（Co2P@pDC-PA） for metal-air *** resulting pANI-PA derived Co2Pbased carbon composite exhibits exceptional bifunctional ORR/OER activities with a half-wave potential of 0.79 V for ORR and 1.62 V of over-potential for OER at 10mA·*** to the synergistic effect of its unique three-dimensional（3.） structure,N,P-doped carbon framework,and encapsulated Co2P nanoparticles,as-fabricated composite can be used as a highly efficient air cathode in the rechargeable metal-air *** assembled rechargeable ZAB demonstrates a high-power density of 190.0 mW·cm-2and remarkable cycling stability over1000 *** study introduced a novel approach that paves the way for the efficient,cost-effective,and scalable production of bifunctional electrocatalysts for rechargeable ZABs.

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