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A Superconducting Magnet with Center Field of 10 T and φ100 mm Warm Bore

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电工电能新技术 2006年第4期25卷 8-14,80页

作者： Q.Wang L.y.n B.Zhao S.Song y.Dai y.Lei H.Wang H.-C.huang Institute of Electrical Engineering Chinese Academy of SciencesBeijing 100080China Diamond Light Source Ltd.Diamond House Chilton Didcot OXONOX11 0DEUK

Aconduction-cooled superconducting magnet with central field of 10Tand warmbore of 100 mmwas designed based on a Nb3Sn and two NbTi superconducting *** the first stage,the NbTi coils havebeen fabricated ***-stage 4 KGifford-McMahon(GM) cry.cooler withthe second-stage powerin1W,4.2Kis used to cool the magnet fromroomtemperature to 4 *** superconducting magnet with thesame power supply.has the operating current of *** magnet can be rotated with a support frame to beoperated with either horizontal or vertical *** of Bi-2223 hightemperature superconductingcurrentleads was employ.dto reduce heat leakage into *** NbTi coils reachto the operating current of120Awithout training effect to be observed duringchargingof the magnet during40 minutes chargingtime andgenerate the center field of *** training effect inthe NbTi magnet directly.cool-down by.cry.cooler andinter-winding support structure in magnet can be *** superconducting magnet has beenstably.operatedfor more than 275 hours with *** this paper,the detailed design,fabrication,stressanaly.is and quench protection characteristics are presented.

关键词： conduction-cooled superconducting magnet FEAdetailed model training effect

Effect of sample size on the response of DEM samples with a realistic grading

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Particuology 2014年第4期12卷 107-115页

作者： Xin huang Kevin J.Hanley.Catherine O'Sullivan Fiona C.y.Kwok Skempton Building Department of Civil and Environmental EngineeringImperial College LondonLondon SW7 2AZUnited Kingdom Haking Wong Building Department of Civil EngineeringThe University of Hong Kong

This paper shows that for DEM simulations of triaxial tests using samples with a grading that is repre- sentative of a real soil, the sample size significantly.influences the observed material response. Four DEM samples with identical initial states were produced： three cy.indrical samples bounded by.rigid wails and one bounded by.a cubical periodic cell, When subjected to triaxial loading, the samples with rigid boundaries were more dilative, stiffer and reached a higher peak stress ratio than the sample enclosed by.periodic boundaries. For the rigid-wall samples, dilatancy.increased and stiffness decreased with increasing sample size, The periodic sample was effectively.homogeneous, The void ratio increased and the contact density.decreased close to the rigid walls, This heterogeneity.reduced with increasing sample size. The positions of the critical state lines （CSLs） of the overall response in e-log p＇ space were sensitive to the sample size, although no difference was observed between their slopes. The critical states of the interior regions of the rigid-wall-bounded samples approached that of the homogeneous periodic sample with increasing sample size. The ultimate strength of the material at the critical state is independent of sample size.

关键词： Discrete element method Sample size Rigid boundary.Periodic boundary.Critical state

Constitutive modeling of ultra?fine?grained titanium flow stress for machining temperature prediction

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Bio-Design and Manufacturing 2019年第3期2卷 153-160页

作者： Jinqiang Ning Vinh Nguy.n y.ng huang Karl T.Hartwig Steven y.Liang George W.Woodruff School of Mechanical Engineering Georgia Institute of Technology801 Ferst DriveAtlantaGA 30332USA Department of Mechanical and Aerospace Engineering University of Florida231 MAE-AP.O.Box 116250GainesvilleFL 32611USA Department of Mechanical Engineering Texas A&M University3123 TAMUCollege StationTX 77843?3123USA

This work investigates the machining temperatures of ultra-fine-grained titanium(UFG Ti),prepared by.equal channel angular extrusion,through analy.ical *** Ti has great usefulness in biomedical applications because of its high mechanical strength,sufficient manufacturability.and high *** temperatures were predicted using a phy.ics-based predictive model based on material constitutive relation and mechanics of the orthogonal cutting *** minimization between the stress calculated using Johnson–Cook constitutive model and the same stress calculated using mechanics model y.elds the estimation of machining temperatures at two deformation *** agreements are observed upon validation to the values reported in the *** machinability.of UFG Ti is investigated by.comparing its machining temperature to that of Ti–6Al–4V alloy.under the same cutting *** lower temperatures are observed in machining UFG *** computational efficiency.of the presented model is investigated by.comparing its average computational time(~0.5 s)to that of a widely.used modified chip formation model(8900 s)with comparable prediction *** work extends the applicability.of the presented temperature model to a broader class of materials,specifically.ultra-fine-grained *** high computational efficiency.allows the in situ temperature prediction and optimization of temperature condition with process parameters planning.

关键词： Ultra-fine-grained titanium Analy.ical modeling High computational efficiency Johnson–Cook model Cutting mechanics

TRANSFERMATRIXMETHODOFDAMPINGMULTIBODy.y.TEMSVIBRATION

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宇航学报 1996年第2期 29-36页

作者：Ｅ．ＳｔｅｉｎＹ．Ｊ．ＨｕａｎｇＵｎｉｖｅｒｓｉｔａｔＨａｎｎｏｖｅｒ

基于文献［１，２］建立的多体系统传递矩阵法，进一步阐述了处理含有各种阻尼的多体系统固有振动的传递矩阵法，讨论了系统对任意激励响应

关键词：刚体弹性体阻尼多体系统传递矩阵法

Electrodeposition mechanism of Ni-Mo-P alloy.in the solution of ammoniac citrate

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Chinese Journal of Chemistry 1997年第3期15卷 193-200页

作者： Zeng, y.y.o, SW Cao, XQ huang, HX Zhong, Zy.Guo, HT TIANJIN UNIV DEPT APPL CHEMTIANJIN 300072PEOPLES R CHINA

The induced codeposition mechanism of Mo, P and Ni from the solution of ammoniac citrate was studied by.means of steady.state polarization, AC impedance and X-ray.Photoelectron Spectroscopy.(XPS). The result of electrochemical measurements proved that [NiCit(NH3)(2)](-) is the electro-active species of nickel, though nickel ions exist mainly.as [NiCit(NH3)(3)](-) in ammoniac citrate. XPS experiments proved the existence of tetravalent moly.denum corresponding to MoO2 on the surface of some deposits. The intermediate product, MoO2, was probably.reduced to Mo in the alloy.deposit by.atomic hy.rogen adsorbed on the induced metal nickel. The reduction of H2PO2- occurs through two distinctive steps with PH3 as an, intermediate, which subsequently.reacts with atomic hy.rogen to form P in the alloy.deposit. The electrodeposition mechanism was proposed in this paper.

关键词： Ni-Mo-P alloy electrodeposition mechanism

Triassic Strata Around Tsuny. City.Northern Kueichou

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地质学报 1944年第Z2期 166-175页

作者： y. WANG Geological Survey.of China

The occurrence of Triassic strata around the city.of Tsuny.;in northern Kueichou has been known since the exploration of y.h in 1927. Two y.ars later, V. K. Ting, T. K. huang and y. L. Wang made their journey.through Tsuny. and collected some fossils from a series of rocks above the Permian coal series. These explorations, reconnaissance in nature, y.eld lit（?）le information concerning thickness,

关键词： Triassic Strata Around Tsuny. City.Northern Kueichou

Material and structural instabilities of single-wall carbon nanotubes

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Acta Mechanica Sinica 2008年第3期24卷 285-288页

作者： J.Wu K.C.Hwang J.Song y.huang FML Department of Engineering MechanicsTsinghua UniversityBeijing 100084China Department of Mechanical Science and Engineering University of Illinois1206 W.Green StreetUrbanaIL 61801USA Department of Civil and Environmental Engineering and Department of Mechanical Engineering Northwestern UniversityEvanstonIL 60208USA

The nonlinear atomistic interactions usually.involve softening behavior. Instability.resulting directly.from this softening are called the material instability. while those unrelated to this softening are called the structural instability. We use the finite-deformation shell theory.based on the interatomic potential to show that the tension instability.of single-wall carbon nanotubes is the material instability. while the compression and torsion instabilities are structural instability.

关键词： Carbon nanotubes Instability

Finite Element Analy.is of Push-Out Test of SiC Fiber Reinforced Titanium Matrix Composites

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稀有金属材料与工程 2009年第A3期38卷 50-53页

作者： y.an M N y.ng y.Q huang B Zhang R J School of Materials Northwestern Polytechnical University Xi＇an 710072 China

Based on the interphase lay.r model and the spring lay.r model, an improved interface model was developed to evaluate the interfacial shear strength of Titanium matrix composites(TMCs) and to analy.e the effects of various parameters on the interfacial properties. The results showed that the improved interface model is more suitable for calculating the interfacial properties of SiC fiber reinforced titanium matrix composites. The interfacial shear strength of SiC/Timetal-834 predicted is 500 MPa. In addition, in order to better understand the interfacial properties of composites, some push out phenomenon were analy.ed.

关键词：复合材料剪切强度碳化硅纤维物理性能

Coating behavior and surface hardening of Pd_(77)Cu_6Si_(17) thin film metallic glass on AZ31 magnesium alloy

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Journal of Zhejiang University.Science A(Applied Phy.ics & Engineering) 2013年第12期14卷 898-905页

作者： X.H.DU y.C.CHANG H.J.PEI B.y.CHEN M.C.KUO J.C.huang School of Materials Sciences and Engineering Shenyang Aerospace University Department of Materials and Optoelectronic Science National Sun Yat-Sen University Department of Materials Engineering Kun Shan University

Pd77Cu6Si17(PCS) thin film metallic glasses(TFMGs) with high glass forming ability.and hardness were selected as a hard coating for improving the surface hardness of AZ31 magnesium alloy. Both microindentation and nanoindentation tests were conducted on specimens with various PCS film thicknesses from 30 to 2000 nm. The apparent hardness and the relative indentation depth(β) were integrated using a quantitative model. The interaction parameters involved and relative hardness values were extracted from iterative calculations. According to the results, surface hardness can be enhanced greatly.by.PCS TFMGs in the shallow region, followed by.gradual decrease with increasing β ratio. In addition, specimens with thinner coatings(e.g., 200nm) showed greater substrate-film interaction and those with thick coatings(e.g., 2000nm) became prone to film cracking. The optimum TFMG coating thickness in this study.was estimated to be around 200 nm.

关键词： Thin film metallic glass(TFMG) Magnesium alloy Sputtering process Nanoindentation Coating thickness