|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Numerical and experimental investigation of the fracture behavior of shock loaded alumina显示文摘Plate impact expeiments are conducted to investigate the dynamic behavior of alumina by using one stage light gas gun. A ve-locity interferometer system for reflectors (VISAR) is used to obtain Hugoniot elastic limit and the free surface velocity profile,which consists of an elastic wave followed immediately by a dispersive inelastic wave. The stress histories under different impact velocities are measured by in-material manganin gauges. Based on the experimental data a Hugoniot curve is fitted,which shows the compressive characteristics that alumina changes typically from elastic to 'plastic' ,and under higher pressure it will be transferred to similar-fluid state. The turning point of the Hugoniot curve from a high pressure region to a low pressure region is about 11.4 GPa. The fracture process of alumina is simulated by way of finite element code. After the analysis of the fracture mechanism,the numerical results show an important role played by the nucleation and the growth of the cracks in the macro-scopic fracture of the alumina target. The numerical predictions of stress histories are compared with the experimental results,which indicates consistency between them. | REN HuiLan1,SHU XueFeng2 & LI Ping3 1 State Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology,Beijing 100081,China 2 Institute of Applied Mechanics and Biomedical Engineering,Taiyuan University of Technology,Taiyuan 030024,China 3 Labroratory for Shock Wave and Detonation Physics Research,Institute of Fluid Physics,CAEP,Mianyang 610059,China | 2010 | Science China(Physics,Mechanics & Astronomy)2010，53，2： | 7 |
| 2 | A first-principles investigation into the hydrogen bond interaction in β-HMX显示文摘A theoretical study of structural and electronic properties of β-HMX crystal is performed using density-functional theory(DFT). The total density of states(TDOS) is presented. The atomic orbit projected density of state(PDOS) from the p-type orbit of C,N,O and the s-type orbit of H is discussed. The study by analyzing the PDOS shows that the structure of β-HMX crystal possesses C-H···O intra- and inter-molecular hydrogen-bonding. There exists a hydrogen bonding between H5 -1s and O12 -2p orbits,between H19 -1s and O28 -2p orbits of intra molecules,and between H19 -1s and O24 -2p orbits of inter molecules. The Mulliken population analysis is also made. | CHEN Fang 1 ,ZHANG Hong 1,2,ZHAO Feng 3 ,MENG ChuanMin 3 & CHENG XinLu 1 1 Institute of Atomic and Molecular Physics,Sichuan University,Chengdu 610065,China 2 School of Physical Science and Technology,Sichuan University,Chengdu 610065,China 3 Laboratory for Shock Wave and Detonation Physics Research,Southwest Institute of Fluid Physics,China Academy of Engineering Physics,Mianyang 621900,China | 2010 | Science China(Physics,Mechanics & Astronomy)2010，53，6： | 4 |
| 3 | Large eddy simulation of a shocked gas cylinder instability induced turbulence显示文摘The Navier-Stokes equations for compressible fluid are solved with the operator splitting technique and LES (large eddy simulation) with the Smagorinsky model. A computational code MVFT (multi-viscosity-fluid and turbulence) is developed to study hydrodynamic instability and the induced turbulent mixing for multi compressible fluid. In order to validate the code MVFT,the LANL's shock tube experiment of shocked SF6 gas cylinder is simulated with the initial state of SF6 gas cylinder described by dissipative ITL (interface transition layer). It is shown that the width and height of gas cylinder calculated with MVFT are closer to the experimental results than RAGE,and that the velocities of upstream edge,downstream edge and vortex edge agree with the experimental results,and are appreciably smaller than the RAGE results. The code MVFT has been pre-liminarily validated. | LI Ping,BAI JingSong,WANG Tao & ZOU LiYong National Key Laboratory for Shock Wave and Detonation Physics Research,Institute of Fluid Physics,CAEP,Mianyang 621900,China | 2010 | Science China(Physics,Mechanics & Astronomy)2010，53，2： | 3 |
| 4 | Effects of viscosity on shock-induced damping of an initial sinusoidal disturbance显示文摘A lack of reliable data treatment method has been for several decades the bottleneck of viscosity measurement by disturbance amplitude damping method of shock waves.In this work the finite difference method is firstly applied to obtain the numerical solutions for disturbance amplitude damping behavior of sinusoidal shock front in inviscid and viscous flow.When water shocked to 15 GPa is taken as an example,the main results are as follows:(1) For inviscid and lower viscous flows the numerical method gives results in good agreement with the analytic solutions under the condition of small disturbance(a0/λ=0.02);(2) For the flow of viscosity beyond 200 Pa s(η=κ) the analytic solution is found to overestimate obviously the effects of viscosity.It is attributed to the unreal pre-conditions of analytic solution by Miller and Ahrens;(3) The present numerical method provides an effective tool with more confidence to overcome the bottleneck of data treatment when the effects of higher viscosity in experiments of Sakharov and flyer impact are expected to be analyzed,because it can in principle simulate the development of shock waves in flows with larger disturbance amplitude,higher viscosity,and complicated initial flow. | MA XiaoJuan1,LIU FuSheng1 & JING FuQian2 1 College of Physical Science and Technology,Southwest Jiaotong University,Chengdu 610031,China 2 Laboratory for Shock Wave and Detonation Physics Research,Institute of Fluid Physics,Chinese Academy of Engineering Physics,Mianyang 621900,China | 2010 | Science China(Physics,Mechanics & Astronomy)2010，53，5： | 2 |
| 5 | COMPLEX NONLINEAR MATHEMATICAL MODEL FOR A KIND OF VEHICLE SHOCK ABSORBORS显示文摘0INTRODUCTIONShockabsorbersarethedampingelementsinvehiclesuspensions.Theperformancesoftheelementsdirectlyafecttheridecomfort... | Tan Runhua Hebei University of Technology Chen Ying Zhejiang UniversityLiu Baoshan Automobile Shock Absorber Factory of Tianjin Lu Yongxiang Chinese Academy of Sciences | 1999 | Chinese Journal of Mechanical Engineering1999，12，1： | 2 |
| 6 | APPLICATION OF WAVELET TIME-FR EQUENCY ANALYSIS TO IDENTIFICA-TION OF CRACKED ROTOR显示文摘Based on the simple hinge crack model and the local flexibility theorem ,the corresponding dynamic equation of the cracked rotor is modelled,the numerical simulation solutions of the cracked rotor and the uncracked rotor are obtained,By the continuous wavelet time-frequency transform,the wavelet time-frequecney properties of the uncracked rotor and the cracked rotor are discussed, A new detection algorithm that uses the wavelet time-frequency transform to identify the crack is proposed.The influence of the sampling frequency on the wavelet time-frequency transform is analyzed by the numerical simulation research .The valid sampling frequency is suggested ,Experiments demonstrate the validity and avaliability of the proposed algorithm in identification of the cracked rotor for engi-neering practices. | Zou JianChen JinPu YapengGeng ZunminState Key Laboratory of Vibration,Shock & Noise,Shanghai Jiaotong University,Shanghai 200030, China | 2003 | Chinese Journal of Mechanical Engineering2003，16，1： | 2 |
| 7 | Calculation of the thermodynamic and transport properties of aqueous species at high pressures and temperatures: correlation algorithms for ionic species and equation of state predictions to 5 kb and 1000℃ 显示文摘 | Shock E L I-Ielgeson H C | 1988 | Geochimica et Cosmochimica Acta1988，52，8： | 1 |
| 8 | Effects of polyacrylamide application method on soil erosion and water infiltration显示文摘 | Burton D G Trenkel J E Shock C C | | 0，，： | 1 |
| 9 | Organic synthesis during fluid mixing in hydrothermal systems 显示文摘 | Shock E L Schulte M D | 1998 | Journal of Geophysical Research1998，103，28： | 1 |
| 10 | Effects of transitory water stress on potato tuber stem-end reducing sugar and fry color显示文摘 | Eldredge E P Holmes Z A Mosley A R Shock C C Stieber T D | | 0，，： | 1 |
| 11 | Rare earth elements in hydrothermal systems: Estimates of standard partial mold thermodynamic properties of aqueous complexes of the rare earth elements at high pressures and temperatures 显示文摘 | Haas J R Shock E L Sassani D C | 1995 | Geochimica et Cosmochimica Acta1995，59，21： | 1 |
| 12 | Merging genomes with geochemistry in hydrothermal ecosystems显示文摘 | Reysenbach A L Shock E | 2002 | Science2002，296，： | 1 |
| 13 | Microwave ablation with loop antenna:in vivo porcine liver model显示文摘 | Shock SA Meredith K Warner TF | 2004 | Radiology2004，231，1： | 1 |
| 14 | Response of Lead solubility to dissolved carbonate in drinking water显示文摘 | Shock M R | 1980 | JA WWA1980，72，12： | 1 |
| 15 | Creating District Readiness for Implementing Evidence-Based School-Centered Asthma Programs:Denver Public Schools as a Case Study显示文摘 | Cicutto L Shocks D Gleason M | 2016 | NASN Sch Nurse2016，12，28： | 1 |
| 16 | Plot sprinklers for irrigation research显示文摘 | Eldredge E P Shock C C Stieber T D | | 0，，： | 1 |
| 17 | Hydrothermal systems as environments for the emergence of life显示文摘 | Shock E | 1996 | Ciba Foundation Symposium1996，202，： | 1 |
| 18 | Calibration of granular matrix sensors for irrigation management显示文摘 | Eldredge E P Shock C C Stieber T D | | 0，，： | 1 |
| 19 | Inorganie species in geo- logic fluids:Correlations among standard molal thermodynamic properties of aqueous ions and hydroxide complexes 显示文摘 | Shock E L Sassani D C Willis M | 1997 | Geoch-imica et Cosmochimica Acta1997，61，5： | 1 |
| 20 | Alpha-1-antitrypsin stimulates fibroblast proliferation and procollagen production and activates classical MAP kinase signalling pathways显示文摘 | Laurent GJ Shock A | 2001 | J Cell Physiol2001，186，1： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员