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计量学报 2009年第6期30卷 -页

作者：姜建山陈伟民黄尚廉廖昌荣章鹏 Jian-shan Wei-min Shang-lian Chang-rong 重庆大学光电技术及系统教育部重点实验室重庆400044 重庆交通大学信息科学与工程学院重庆400074

基于逆磁致伸缩效应,建立钢缆索索力传感器理论模型,分析了施加在缆索材料上的力信号(外力和应变)与磁信号(磁感应强度、磁场强度)之间的耦合关系.针对一种环式结构的索力传感器,对索力测量原理做了详细推导,可通过检测感应线圈的感应... 详细信息

基于逆磁致伸缩效应,建立钢缆索索力传感器理论模型,分析了施加在缆索材料上的力信号(外力和应变)与磁信号(磁感应强度、磁场强度)之间的耦合关系.针对一种环式结构的索力传感器,对索力测量原理做了详细推导,可通过检测感应线圈的感应电压反映材料所受外力.传感器输出感应电压与空气间隙尺寸、外部激励磁场下的材料磁导率、激励磁场变化、加载外力变化等因素有关,重点分析了激励磁场变化和外力变化对传感器输出的影响.当外力是缓变力,可通过检测感应积分电压求得外力;当外力是交变力,直接通过感应电压求得外力;最后通过对磁场变化和外力变化影响分别进行了仿真,结果与理论分析基本一致,表明所建立的索力传感器理论模型可行.Abstract：Based on Villari-effect, the theoretic mdel d the cable tension sensor is presented. The relationship between mechanical parameters such as stress, strain and electromagnetic parameters like magnetic field and magnetic induction field are discussed. One loop-shaped stinulative structure of cable tension sensor based on Villari--effect is proposed and cable tension sensor principle is deeply analysed. By measuring inductive voltage in inductive loops, cable tension stress may be measured. Sensor output may be determined by air clearance, magnetic permeability, magnetic field, stress and inductive loops denseness. The sensor output effects resulting from magnetic field and stress ate analysed respectively. When stress changes tardigradely, the cable tension stress may be measured by measuring inductive integral voltage. When stress changes expeditiously, the cable tension stress may be measured by measuring inductive voltage. Sensor sensibility may be determined by stress frequency, inductive loops denseness, magnetic field and nagnetic permeability. In addition, the sensor output effects from magnetic changing and stress changing have been analysed with emulational methods. The results indicate that sensor theory model is feasible.

关键词：逆磁致伸缩效应力传感器影响因素研究 Based Cable tension Influencing Factors cable tension tension stress magnetic field 外力激励磁场感应电压磁场变化 mechanical parameters magnetic induction 索力理论模型 changing changes 分析

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INTERFACIAL tensionS OF SOLID COPPER/LIQUID LEAD AND SOLID COPPER/LIQUID BISMUTH

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Journal of Southeast University(English Edition) 1991年第1期7卷 37-43页

作者：刘友鹏陶为民吴申庆 Department of Material Science and Engineering

The solid-liquid interfacial tensions of Cu(solid)-Pb(liquid)andCu(solid)-Bi(liquid)binary systems have been determined by the dihedral angle *** results show that at 850℃ the interfacial tensions are 368±55mN/m for Cu-Pb sys-tem and 336±35mN/m for Cu-Bi systa,respectively,the error ranges of which aremore narrow than those found in some papers published *** addition,there is nodetective segregation of other solute atoms or compounds in the vicinity of the tip of cop-per grain boundary where dihedral angles formed.

关键词： interfacial tension solids liquid copper lead bismuth/dihedral

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Mechanical behavior of TiAl alloys

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中国科学:技术科学英文版 2023年第9期66卷 2457-2480页

作者： XIANG HengGao CHEN Yang QI ZhiXiang ZHENG Gong CHEN FengRui CAO YueDe LIU Xu ZHOU Bing CHEN Guang National Key Laboratory of Advanced Casting Technologies MIIT Key Laboratory of Advanced Metallic and Intermetallic Materials TechnologyEngineering Research Center of Materials Behavior and DesignMinistry of EducationNanjing University of Science and TechnologyNanjing 210094China

Intermetallic TiAl alloys attract much attention in advanced engineering fields due to their low density(3.9–4.2 g/cm3) and excellent high-temperature properties. After more than half a century of research and development, TiAl alloys have found applications in aerospace, automotive, and related industries. However, as a kind of semi-brittle materials, intermetallic TiAl alloys exhibit different mechanical behavior from metallic and ceramic materials. Thus, it is necessary to systematically understand their mechanical behavior to ensure further developments and safe engineering applications. In this paper, the principal mechanical behavior of Ti Al alloys was reviewed comprehensively, including tension, creep, fatigue, and strengthening mechanisms. The mechanical performance and the corresponding deformation mechanisms are summarized and discussed in detail. The future directions of mechanical research on TiAl alloys are also overviewed to expedite their extensive utilization in engineering fields.

关键词： TiAl tension creep fatigue strengthening mechanisms

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BEHAVIOR OF ELASTIC TOWING CABLES IN SHEAR CURRENTS

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Journal of Hydrodynamics 2005年第5期17卷 590-595页

作者： HOU Guo-xiang LI Hong-bin ZHANG Sheng-jun YANG Yun-tao XU Shi-hua XIE Wei College of Traffic Science and Engineering Huazhong University of Science and Technology Wuhan 430074 China Systems Engineering Research Institute Beijing 100036 China Wuhan Ship Development and Design Institute Wuhan 430064 China

The formulation and solution of governing equations that can be used to analyse the three dimensional behaviour of elastic towing cables subjected to arbitrary sheared currents were presented in this paper. The elastic cable geometry was described in terms of two angles, elevation and azimuth, which are related to Cartesian co ordinates by geometry compatibility relations. These relations were combined with the cable equilibrium equations to obtain a system of non-linear differential equations. In the end, results for cable tension, angles, geometry and elongation are presented for example cases.

关键词： buoy system cable shear current tension

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Soft Fibrous Structures in Nature as Liquid Catcher

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Acta Mechanica Solida Sinica 2019年第5期32卷 580-590页

作者： Moxiao Li Tianjian Lu Feng Xu State Key Laboratory for Strength and Vibration of Mechanical Structures School of AerospaceXi'an Jiaotong UniversityXi'an 710049China Bioinspired Engineering and Biomechanics Center(BEBC) Xi'an Jiaotong UniversityXi'an 710049China State Key Laboratory of Mechanics and Control of Mechanical Structures Nanjing University of Aeronautics and AstronauticsNanjing 210016China Nanjing Center for Multifunctional Lightweight Materials and Structures(MLMS) Nanjing University of Aeronautics and AstronauticsNanjing 210016China The Key Laboratory of Biomedical Information Engineering of the Ministry of Education School of Life Science and TechnologyXi'an Jiaotong UniversityXi'an 710049China

Past decades have witnessed the explosive growth of interest in the field of bioinspired materials,of which the structures and properties can be well utilized for industrial and bioengineering *** these structures,the natural fibrous structures propose diverse strategies to adapt to their environment,offering inspirations for versatile applications,especially droplet *** various well-adapted soft structures and materials,these fibrous structures show good control over their interaction with liquids(e.g.,water),providing a database full of effective solutions to these droplet-related scientific and technical problems(e.g.,colloidal synthesis,single-cell gene sequencing,drug delivery and solution synthesis).In this review,the current achievements in water collection by multiple fibrous structures are highlighted;the structures,basic models,bio-inspired structures and their applications are presented;and the current challenges and future prospects for the development of bio-inspired fibrous structures are discussed.

关键词： Soft fibrous structure Micro-and nanostructure Bio-inspired materials Surface tension

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Microstructure and stress corrosion cracking of a SA508-309L/308L-316L dissimilar metal weld joint in primary pressurized water reactor environment

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Journal of Materials Science & Technology 2020年第5期40卷 1-14页

作者： Lijin Dong Cheng Ma Qunjia Peng En-Hou Han Wei Ke Key Laboratory of Nuclear Materials and Safety Assessment Institute of Metal ResearchChinese Academy of SciencesShenyang110016China School of Materials and Engineering Southwest Petroleum UniversityChengdu610500China

Stress corrosion cracking(SCC) of an SA508-309 L/308 L–316 L dissimilar metal weld joint in primary pressurized water reactor environment was investigated by the interrupted slow strain rate tension tests following a microstructure characterization. The 308 L weld metal shows a higher content of δ ferrite than the 309 L weld metal. In addition, no obvious Cr-depletion but carbides precipitation at δ phase boundaries was observed in both 308 L and 309 L weld metals. The slow strain rate tension tests showed that the SCC susceptibility of the base and weld metals of the dissimilar metal weld joint follows the order of SA508 < 308 L weld metal < the heat affected zone of 316 L base metal < 309 L weld *** higher SCC susceptibility of 309 L weld metal than that of 308 L weld metal is likely due to the lower content of δ ferrite. In addition, a preferential SCC initiation in the 309 L weld metal adjacent to 308 L weld metal is attributed to few carbides in this region.

关键词： Dissimilar metal weld joint Stress corrosion cracking Microstructure Primary pressurized water reactor environment Slow strain rate tension

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A Three-Dimensional Multi-scale Plasticity Model for Metal-Intermetallic Laminate Composites Containing Phases of the L12 Structure

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Acta Metallurgica Sinica(English Letters) 2018年第12期31卷 1265-1271页

作者： Yana D.Lipatnikova Vladimir A.Starenchenko Yuliya V.Solov'eva Larisa A.Valuiskaya Tomsk State University of Architecture and Building Solyanaya Sq.2TomskRussia 634003 Siberian State Medical University 2 Moskovsky traktTomskRussia 634055

A three-dimensional plasticity model was developed and applied to metal-intermetallic laminate composites containingphases of the L12 structure. A multi-scale approach that combined the methods of continuum mechanics and dislocationkinetics was used. This model takes account of the different mechanisms of self-locking superdislocations, the dislocationsand the dislocation walls＇ density storage for each type of layer at the micro-scale. At the meso-scale, the solutions to thedislocation kinetics equations, in the form of stress-strain curves, were used to create the properties of a three-dimensionalrepresentative element. The numerical simulation study of the macroscopic deformation was carried out with the finiteelement method using the dynamic model of continuum mechanics, which included the classical conservation laws,constitutive equations and the equation of state. It was shown that the simulation results generated using this model were ingood agreement with the mechanical tests conducted on the single crystals of the L12 structure. The model provides anexcellent description of the high-temperature plastic strain superlocalization effect of single crystal intermetallics of theLI2 structure. This paper describes the numerical results of the study of the tension and compression tests of metal-intermetallic laminate composites containing phases of the L12 structure. The model allows the description of the dis-tribution of the accumulated plastic strain inhomogeneities and is capable of predicting the strengthening properties andplastic behaviour of the metal-intermetallic laminate composites containing phases of the L12 structure.

关键词： Plasticity model Metal-intermetallic laminate composites Layered composites L12 structure tension Compression

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Loading characteristics of mechanical rib bolts determined through testing and numerical modeling

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International Journal of Mining Science and Technology 2020年第1期30卷 17-24页

作者： Khaled Mohamed Gamal Rashed Zorica Radakovic-Guzina Centers for Disease Control National Institute for Occupational Safety and HealthPittsburghPA 15236USA ITASCA Consulting Group MinneapolisMN 55401USA

Underground coal mines use mechanical bolts in addition to other types of bolts to control the rib deformation and to stabilize the yielded coal *** research has been conducted to understand the performance of the mechanical bolts in coal *** from the National Institute for Occupational Safety and Health(NIOSH)conducted this work to understand the loading characteristics of mechanical bolts(stiffness and capacity)installed in coal ribs at five underground coal *** pull-out tests were performed in this study to define the loading characteristics of mechanical rib *** installation torques were applied to the tested bolts based on the strength of the coal seam.A typical tri-linear load-deformation response for mechanical bolts was obtained from these *** was found that the anchorage capacity depended mainly on the coal *** for modeling mechanical bolts have been developed using the tri-linear load-deformation *** outcome of this research provides essential data for rib support design.

关键词： Coal rib Mechanical bolt Conventional bolt tension bolt Point-anchored bolt Rib support Pull-out test Numerical modeling FLAC3D

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Tensile and fracture properties of an Mg-RE-Zn alloy at elevated temperatures

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Journal of Rare Earths 2014年第6期32卷 564-572页

作者： TROJANOVZuzanka DONI Tibor LUK Pavel PALEK Peter CHALUPOV Mária TILLOV Eva BASTOVANSKY Ronald Faculty of Mathematics and Physics Charles University Faculty of Mechanical Engineering University of Zilina

Magnesium alloy EZ10 （Mg-RE-Zn） was deformed in tension at temperatures from 20 up to 520℃. A rapid decrease of the yield and tensile strength with temperature was observed at temperatures higher than 300 ℃. On the other hand, ductility of sam-ples rapidly increased in the same temperature range. Light microscopy and scanning electron microscopy was used to reveal the rea-son for these behaviours. Intermetallic particles in grain boundaries are responsible for excellent mechanical properties at lower tem-peratures. Diffusional processes occurring at temperatures higher than 300 ℃ significantly influenced the deformation mechanism as well as the fracture character.

关键词： magnesium alloy tension dislocation slip twinning dynamic recrystallization grain boundary sliding, fracture, cavitation rare

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Features of Electroplastic Effect in Alloys with Martensite Transformation

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Acta Metallurgica Sinica(English Letters) 2018年第12期31卷 1305-1310页

作者： Vladimir Stolyarov Mechanical Engineering Research Institute RussianAcademy of SciencesM.Kharitonievsky4MoscowRussia 101990 National Research Nuclear University MEPhI MoscowRussia

Influence of different electric current modes （pulse and direct） on occurrence of the electroplastic effect under uniaxialtension in the coarse-grained alloys with martensite transformations is investigated. The materials are shape memoryTi49.3Niso.7 alloy and metastable austenite transformation-induced plasticity （TRIP） steel. The paper contains experimentalresults of current impact on the ＂stress-strain＂ curves of the material. It has been taken an experimental measurement ofthe sample temperature during the test. It is shown that the shape of a stress-strain curves and type of the serrate plasticflow, connected with the martensitic transformation and electroplastic effect, depend on the current modes. Impact of pulsecurrent and direct current suppresses shape memory and TRIP effect.

关键词： Electroplastic effect TRIP effect Pulse current Deformation Martensite transformation tension

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