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| 1 | Fuzzy interface treatment in Eulerian method显示文摘In this paper, we incorporate fuzzy mathematics approach into the Eulerian method to simulate three dimensional multi-material interfaces. In particular, we propose a fuzzy interface treatment for describing interfaces, designing transport plans, and computing transport quantities. Using a set of three-dimensional inviscid isothermal elastic-plastic hydrodynamic equations, we simulate shaped charge jet in different filled dynamite structures. Strain and stress have been under consideration in simulations. Numerical results demonstrate that the fuzzy interface treatment is correct and efficient for three-dimensional multi-material problems. | NING Jianguo1 & CHEN Longwei1,2 1. National Key Laboratory of Protection and Control of Explosive Disaster, Beijing Institute of Technology, Beijing 100081, China 2. The Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming 650093, China Correspondence should be addressed to Ning Jianguo | 2004 | Science China(Technological Sciences)2004，47，5： | 40 |
| 2 | Influence of obstacle disturbance in a duct on explosion characteristics of coal gas显示文摘In combination with experimental research,numerical simulation is performed to investigate the influence law of the obstacles in a duct on the explosion flame of premixed coal gas and air. The numerical method uses upwind WENO scheme and two-step chemical reaction model. The interaction mechanism is addressed between the compression wave from reflection on the right end of the duct and flame propagation. The reflected wave is found to result in the decrease of flame velocity. On this basis,we analyze the mechanism of the obstacles on flame as well as the law of flow field variation thus caused. The results suggest that,due to the obstacles,deflagration wave is repeatedly reflected,combustible gas mixture is fully compressed,temperature and pressure rise,chemical reaction speed increases,and hence flame intensity is strengthened. At the same time,a tripe point forms as a result of wall reflection of the deflagration wave from the obstacles and furthermore local flame speed increases. As the triple point propagates forward,the flame speed gradually decreases due to dissipation of energy. These conclusions provide a valuable theoretical foundation for the prediction of explosion field,prevention of fire and explosion and effective control of the com-bustion speed and flame propagation speed in detonation propulsion. | WANG Cheng1,MA TianBao1 & LU Jie2 1 State Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology,Beijing 100081,China 2 Taiyuan Gas Company,Taiyuan 030024,China | 2010 | Science China(Physics,Mechanics & Astronomy)2010，53，2： | 16 |
| 3 | Fracture characteristics of concrete subjected to impact loading显示文摘This paper takes concrete as a four-phase composite made of the intact matrix and three mutually perpendicular groups of penny-shaped micro-cracks. The intact matrix is assumed to be elastic,homogeneous and isotropic,and the micro-cracks are penny-shaped. Combined with the failure mechanism of concrete subjected to impact loading,a dynamic constitutive model for concrete is developed based on Mori-Tanaka's average stress concept and Eshelby's equivalent inclusion theory. Experimental results show that concrete is rate-dependent. The model predictions are in good agreement with the experimental results. The model may be used to simulate the mechanical behavior of concrete under impact loadings. | LIU HaiFeng1,2,LIU HaiYan3 & SONG WeiDong1 1 State Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology,Beijing 100081,China 2 School of Civil and Hydraulic Engineering,Ningxia University,Yinchuan 750021,China 3 School of Science,Beijing Institute of Technology,Beijing 100081,China | 2010 | Science China(Physics,Mechanics & Astronomy)2010，53，2： | 12 |
| 4 | 多硝基芳烃静电火花感度与爆速的关系(英)显示文摘通过测定32 种多硝基芳烃的静电火花感度,建立了50 % 发火能量 E E S 与爆速平方值的关系式。该式不仅体现了 Evans Polanyi Semenov 关系,而且表明在起爆、初始分解或由静电火花引起的能量转换过程中多硝基化合物分子初始分裂时化学机理的同一性。但电火花能转至分子反应中心的方式还不甚清楚。 | Vladimr ZEMAN, Jir KO?, Svatopluk ZEMAN (Department of Theory and Technology of Explosives, University of Pardubice CZ-532 10 Pardubice,the Czech Republic) | 1999 | 含能材料1999，7，3： | 8 |
| 5 | 硝胺的静电火花感度与爆速的关系(英文)显示文摘通过测定12 种硝胺50 % 发火概率下的静电火花能EES,建立了EES与爆速平方值( D2) 的线性关系,以此可预估尚未合成的硝胺化合物,尤其是那些对硝胺化学有重要意义的化合物,如1硝基1氮杂乙烯、1,3二硝基1 ,3二氮杂环丁烷、1,3 ,5 ,7 ,9五硝基1 ,3 ,5 ,7,9五氮杂环癸烷等的EES。 | Vladimír ZEMAN, Ji rˇ í KO C ˇ?, Svatopluk ZEMAN (Department of Theory and Technology of Explosives,University of Pardubice, CZ-532 10 Pardubice, the Czech Republic) | 1999 | 含能材料1999，7，4： | 8 |
| 6 | Experimental investigation on micro-dynamic behavior of gas explosion suppression with SiO_2 fine powders显示文摘To study the effect of inert dust on gas explosion suppression mechanism,SiO_2 fine powders were sprayed to suppress premixed CH_4-Air gas explosion in a 20 L spherical experimental system.In the experiment,high speed schlieren image system was adopted to record explosion flame propagation behaviors,meanwhile,pressure transducers and ion current probes were used to clearly record the explosion flame dynamic characteristics.The experimental results show that the SiO_2 fine powders suppressed evidently the... | Xianfeng Chen,~(1,2,a)) Yin Zhang,~1 Qingming Zhang,~2 Shaofeng Ren,~1 and Jianxing Wu~1 1)School of Natural Resources and Environmental Engineering,Wuhan University of Technology, Wuhan 430070,China 2)State Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology, Beijing 100081,China | 2011 | Theoretical & Applied Mechanics Letters2011，1，3： | 8 |
| 7 | A hybrid VOF and PIC multi-material interface treatment method and its application in the penetration显示文摘A hybrid VOF and PIC multi-material interface treatment method for Eulerian method is presented in this study in order to solve the problem that the Eulerian method is not robust enough to treat the dynamic fracture of material. This treatment method is used in the important computational region such as the material interface,large deformation region and fracture region where more particles are added for calculation,while the continuous transport method is used in the other regions. Through this method,a series of penetration problems such as blunt projectile penetration into the steel target and steel projectile penetration into concert target are numerically simulated. The comparison of the numerical result and experimental result shows that the hybrid algorithm can effectively track the deformation in the process of penetration and also insure precision and efficiency. | MA TianBao,WANG Jing & NING JianGuo State Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology,Beijing 100081,China | 2010 | Science China(Physics,Mechanics & Astronomy)2010，53，2： | 8 |
| 8 | Level Set interface treatment and its application in Euler method显示文摘Level Set interface treatment method is introduced into Euler method,which is employed for interface treatment method for multi-materials. Combined with the ghost fluid method,the moving interface is tracked. Fifth-order WENO spatial discretization and third-order TVD Runge-Kutta time discretization methods are used. Shock-wave action on bubble,implosion and velocity field Shock effect bubbles; implosion and velocity field are simulated by means of LS-MMIC3D programmed by C++. Nu-merical results show that the Level Set interface treatment method is effective and feasible for multi-material interface treatment in comparison with the WENO method. | WU KaiTeng1,2,HAO Li3,WANG Cheng4 & ZHANG Li1,2 1 Numerical Simulation Sichuan Higher School Key Laboratory,Neijiang Normal University,Neijiang 641112,China 2 College of Mathematics and Information Science,Neijiang Normal University,Neijiang 641112,China 3 College of Science,Beijing University of Civil Engineering and Architecture,Beijing 100044,China 4 State Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology,Beijing 100081,China | 2010 | Science China(Physics,Mechanics & Astronomy)2010，53，2： | 7 |
| 9 | Jet formation and penetration mechanism of W typed shaped charge显示文摘Existing classical shaped charges are well knownfor their longer jets capable of achieving large hole depth tohole diameter ratios in metallic targets.However,in some sit-uations,there arises demand to obtain 1:1 ratio for hole depthto hole diameter which is beyond normal shaped chargescapability.A new variant of shape charge,named W typedshape charge(WSC),is proposed in this paper,which canmeet the demand of 1:1 ratio,and is based on the geometrythat can produce annular jets upon proper initiation scheme.In this paper,we present formation and penetration resultsof WSC based on three different schemes.We also showthat not all WSC designs can form annular jets,only annu-larly initiated WSC,which also fulfils the 'Internal-ExternalLiners Equal-Impulse' criterion,has the capability to formannular jet.The experimental and numerical results show thatwhen the ratio between annular initiation ring diameter andthe charge diameter is 0.75,an annular jet is formed,whichwas also supported by high speed photographs performedin vacuum.2D numerical simulations are performed withindigenously developed simulation software,where Eulerianapproach with multi-material interface tracking algorithm isutilized,to find various mechanisms involved during jet for-mation process.The calculation results are found in goodagreement with the experimental results,indicating that theinterface treatment algorithm proposed in this paper can notonly deal with large deformation problem,but also depictclearly the variation of materials interface.It is especially suitable for simulation of the process from liner collapse toformation of shaped charge jet. | Cheng Wang Fenglei Huang Jianguo Ning State Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology, 100081 Beijing, China | 2009 | Acta Mechanica Sinica2009，25，1： | 7 |
| 10 | 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 |
| 11 | Theoretical observation of hexaatomic molecules containing pentacoordinate planar carbon显示文摘The smallest molecules up to date containing a D5h pentacoordinate planar carbon (PPC) atom, CBe5 and CBe54-, are presented by means of ab initio calculations. To gain a better understanding about which electronic factors contribute to their stabilization, natural bond orbital (NBO) analysis and the nucleus independent chemical shifts (NICS) were calculated. The data reported here suggest that D5h CBe5 is σ aromaticity in nature, while in D5h CBe54- π aromaticity is dominating. The classical octet rule is well satisfied in both molecules, and is one of the fundamental reasons to understand the stability of the pentagon structures. The Be5 ring serves as σ donor in D5h CBe5, and π-acceptor in D5h CBe54-. The D5h CBe54- possessing 18 valence electrons with a closed-shell electron configuration is the most plau-sible candidate for experimental detection. | LUO Qiong State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China | 2008 | Science China Chemistry2008，51，11： | 6 |
| 12 | Quasi-static tensile deformation and fracture behavior of a highly particle-filled composite using digital image correlation method显示文摘Polymer bonded explosives (PBXs) are highly particle-filled composite materials.This paper experimentally studies the tensile deformation and fracture behavior of a PBX simulation by using the semi-circular bending (SCB) test.The deformation and fracture process of a pre-notched SCB sample with a random speckle pattern is recorded by a charge coupled device camera.The displacement and strain fields on the observed surface during the loading process are obtained by using the digital image correlation method.The crack opening displacement is calculated from the displacement fields,the initiation and propagation of the crack are analyzed.In addition,the damage evolution and fracture mechanisms of the SCB sample are analyzed according to the strain fields and the correlation coefficient fields at different loading steps. | Zhongbin Zhou,Pengwan Chen,Baoqiao Guo,Zhuoping Duan,and Fenglei Huang State Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology,Beijing 100081,China | 2011 | Theoretical & Applied Mechanics Letters2011，1，5： | 5 |
| 13 | A thermal-mechanical constitutive model for b-HMX single crystal and cohesive interface under dynamic high pressure loading显示文摘Due to the significant thermal-mechanical effects during hot spot formation in PBX explosives,a thermodynamic constitutive model has been constructed for HMX anisotropic single crystal subjected to dynamic impact loading. The crystal plasticity model based on dislocation dynamics theory was employed to describe the anisotropic plastic behavior along the preferential slip systems. A modified equation of state (EOS) was introduced into the constitutive equations through the decomposing stress tensor and the nonlinear elasticity for materials was taken into account. The one-dimensional strain impact simulations for HMX single crystal and quasi-bicrystal were performed respectively,in which the cohesive elements were inserted over the interface areas for the latter. The predicted particle velocities for the single crystal sample agreed well with the experimental results in the literature. Furthermore,the effects of crystal orientations,interface,misorientations on localized strain,stress and temperature distributions were predicted and discussed. | WU YanQing & HUANG FengLei State Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology,Beijing 100081,China | 2010 | Science China(Physics,Mechanics & Astronomy)2010，53，2： | 4 |
| 14 | A study on compressive shock wave propagation in metallic foams显示文摘Metallic foam can dissipate a large amount of energy due to its relatively long stress plateau,which makes it widely applicable in the design of structural crashworthiness. However,in some experimental studies,stress enhancement has been observed when the specimens are subjected to intense impact loads,leading to severe damage to the objects being protected. This paper studies this phenomenon on a 2D mass-spring-bar model. With the model,a constitutive relationship of metal foam and corresponding loading and unloading criteria are presented; a nonlinear kinematics equilibrium equation is derived,where an explicit integra-tion algorithm is used to calculate the characteristic of the compressive shock wave propagation within the metallic foam; the effect of heterogeneous distribution of foam microstructures on the shock wave features is also included. The results reveal that under low impact pulses,considerable energy is dissipated during the progressive collapse of foam cells,which then reduces the crush of objects. When the pulse is sufficiently high,on the other hand,stress enhancement may take place,especially in the heterogeneous foams,where high peak stresses usually occur. The characteristics of compressive shock wave propagation in the foam and the magnitude and location of the peak stress produced are strongly dependent on the mechanical properties of the foam material,amplitude and period of the pulse,as well as the homogeneity of the microstructures. This research provides valuable insight into the reliability of the metallic foams used as a protective structure. | WANG ZhiHua1,2,ZHANG YiFen2,REN HuiLan1 & ZHAO LongMao2 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 | 2010 | Science China(Physics,Mechanics & Astronomy)2010，53，2： | 4 |
| 15 | A constitutive model of frozen soil with damage and numerical simulation for the coupled problem显示文摘Based on the microcosmic mechanics of composite materials, an elastic constitutive model for frozen soil with damage is presented. For frozen sandy soil with a range of ice contents and under a range of temperature conditions, quantitative results determined by this constitutive model agree with practically measured stress-strain curves. After numerically simulating the coupled water, temperature and stress fields of channel frozen and frozen roadbed using a self-developed finite-element routine, more accurate and practical calculation results for the temperature field coupled with stress, displacement and strain fields are obtained; the results match predictions and tests undertaken by earlier researchers. Our results support the reliability of our routine for calculating interdependent physical quantities of frozen soil and for describing the relationships between them. Our program can offer necessary constraints for engineering design and construction in permafrost regions. | ZHU ZhiWu, NING JianGuo& MA Wei 1 School of Mechanics and Engineering, Southwest Jiaotong University, Chengdu 610031, China 2 State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China 3 Key Laboratory of Frozen Soil Engineering, CAREERI, CAS, Lanzhou 730000, China | 2010 | Science China(Physics,Mechanics & Astronomy)2010，53，4： | 3 |
| 16 | TEX——一种低易损炸药(英文)显示文摘根据低易损弹药 (LOVA)的分类就合成新炸药和复合炸药的问题进行了扼要分析 ,并对一些已知的炸药特性进行了讨论。认为 4 ,10 二硝基 4 ,10 二氮杂 2 ,6 ,8,12 四氧四环 [5.5.0 .0 5,9.0 3,1 1 ]十二烷 (TEX)是一种LOVA炸药 ,但是至今未见其广泛应用的报道 ,本文试图对炸药的现状及未来的发展寻找一种可能的解释。 | Jirˇí V?GENKNECHT (Department of Theory and Technology of Explosives,University of Pardubice,CZ 532 10 Pardubice) | 2000 | 含能材料2000，8，2： | 3 |
| 17 | Synthesis,Crystal Structure, Thermal Decomposition and Sensitivity Properties of (AIM)(HTNR) and (AIM)(PA)显示文摘Two new energetic compounds (AIM)(HTNR) and (AIM)(PA)(AIM=2-azidoimidazole, TNR=2,4,6-trini troresorcinol, PA=picric acid) have been prepared by AIM(2-azidoimidazolium) and TNR(2,4,6-trinitroresorcinol) or PA(picric acid) and characterized by elemental analysis and FTIR spectrum. Their crystal structures were determined by X-ray single-crystal diffraction analysis. The obtained results show that (AIM)(HTNR) crystal belongs to monoc linic, P21/c space group, a=1.1306(2) nm, b=0.70305(14) nm, c=1.7398(4) nm, β=106.91°, V=1.3231(5) nm3, Dc=1.778 g/cm3, Z=4, R1=0.0524, wR2[I >2σ(I)]=0.1067 and S=1.092 and (AIM)(PA) crystal belongs to monoclinic P21/c space group, a=0.80303(16) nm, b=0.81395(16) nm, c=2.0471(4) nm, β=93.93(3)°, V=1.3349(5) nm3, Dc=1.683 g/cm3, Z=4, R1=0.0784, wR2[I>2σ(I)]=0.1814 and S=1.098. Both the compounds have electrostatic attraction and hy drogen bonds, which contribute to making the constructions more stable. The decomposition of the two compounds was studied via differential scanning calorimetry(DSC) and thermogravimetry-derivative thermogravimetry(TG-DTG) techniques at a heating rate of 10 oC/min, and the results show that both the compounds underwent one intensive exothermic decomposition stage. Sensitivity tests reveal that the title compounds were insensitive to friction and im pact and sensitive to flame and could be applied in potential pyrotechnics. | TANG Zhan, YANG Li, QIAO Xiao-jing, WU Bi-dong, ZHANG Tong-lai, ZHOU Zun-ning and YU Kai-bei State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, P. R. China | 2012 | Chemical Research in Chinese Universities2012，28，1： | 3 |
| 18 | The Cosmic Dust in Suzhou Granite:Ablated Products of a Cometary Explosion | Hu Zhong-wei,Wang Er-kang,Wan Yu-qiuDepartement of Astronomy,Nanjing University,Nanjing 210093,China Department of Earth Sdence,Nanjing University,Nanjing 210093,China Cosmic dust has been collected in large number from deap-sea sediments,Greenland ice deposits,the stratosphere and space,of cosmic dust,some are the unmelted micrometeorite,and most are the ablated products of me-teoroids in the atmosphere.Cosmic dusts were recovered from two sites of the 1908 Tunguska explosion and the 1965 Revelstoks explosion Since 1987,a large number of microspherules have been extracted from Suzhou granite of China Their suface and section structures,mineral and chemical composition show that these microspherules are of the ablated cosmic dust.The microspherules occurred in the inner contact complex intrusion.It suggests that the microspherules may be products of the same event and were aggergated in some strata and then captured by the emplacement of granitic magma.Although the microspherules are similare to other ablated cosmic dusts,there are some diferences.Our calculated results of cometary motion through the atmosphere and explosion show that the microspherules may be the ablated dust of a comet with mass above 1015g at its explosion near the ground. | 1996 | 紫金山天文台台刊1996，15，3： | 2 |
| 19 | Calculated Lattice Energies of Energetic Materials in a Prediction of their Heats of Fusion and Sublimation显示文摘The paper specifies an unambiguous basic relationship between the published results of ab initio calculations of lattice energies, E L,and heats of sublimation, ΔH s,of individual energetic materials. In this relationship,the ΔH s value has been replaced by heats of fusion, ΔH m,tr . Thereby its unambiguity has been lost,and the similarity of details of molecular structure begins to be of decisive importance. The resulting partial relationships,together with the basic relationship,have been used for prediction of ΔH s,and ΔH m,tr values of technically attractive polynitro compounds. | Svatopluk Zeman, Miloslav Krupka (Department of Theory and Technology of Explosives,University of Pardubice CZ 532 10 Pardubice, Czech Republic) | 2002 | 含能材料2002，10，1： | 1 |
| 20 | Springer, New York显示文摘 | Dreizinl E L Combustion Explosion | 2003 | : 6812003，，： | 1 |
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