Notice on the organization of advanced research class on high-pressure science and new materials of engineering knowledge of professional and technical personnel Notice on the organization of advanced research class on high-pressure science and new materials of engineering knowledge of professional and technical personnel

2010 Vol. 24, No. 3

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Numerical Simulations of Anti-Penetration of Confined Ceramic Targets by SPH/FEM Coupling Method
BIAN Liang, WANG Xiao-Jun, ZHANG Jie
2010, 24(3): 161-167 . doi: 10.11858/gywlxb.2010.03.001
PDF (839)
Abstract:
Numerical simulations of tungsten long rod penetrating into confined ceramic target was carried out by inserting the constitutive models of ceramic and metal in the SPH/FEM coupling method. The penetration pattern was reproduced and the property of anti-penetration of ceramic targets was discussed. ...
Numerical Study on Bubble Motion near the Wall
LI Jian, RONG Ji-Li
2010, 24(3): 168-174 . doi: 10.11858/gywlxb.2010.03.002
PDF (700)
Abstract:
The volume-acceleration model was introduced to determine the initial condition for bubble motion of underwater explosion. From the basic phenomenon of the interaction between bubble and rigid wall, the dynamic behavior of bubble near wall, including ring rebound of bubble and jet flow, was simulate...
Numerical Computation and Analysis on Anti-Penetration Capability of Rock, Concrete and Soil
WANG Zheng, LOU Jian-Feng, YONG Heng, LIANG Long-He
2010, 24(3): 175-180 . doi: 10.11858/gywlxb.2010.03.003
PDF (868)
Abstract:
Using LS-DYNA3D to compute the problem of projectile penetrating into rock, concrete and soil targets, we analyze anti-penetration capability of these three materials. We choose HJC concrete constitutive model for target materials in numerical computations. Under the lower and intermediate impact ve...
A Calculation Study on the Effect of the Heat Conduction on the Safety of the Solid-Liquid Mixed Charge
DUAN Yun, ZHANG Qi, XIANG Cong, PANG Lei, LI Wei, HE Ning
2010, 24(3): 181-186 . doi: 10.11858/gywlxb.2010.03.004
PDF (735)
Abstract:
The physical parameter of the solid-liquid mixed charge is one of the main factors of the charge safety. Several typical ratios of composite charges were calculated by applying the calculation method of composite explosive physical parameter, and the different physical parameters of charge were nume...
Research on EOS at Extremely High Pressure Using a Three-stage Gas Gun Hypervelocity Launcher Techniques
WANG Qing-Song, WANG Xiang, DAI Cheng-Da, BO Jin-Song, TAN Hua, HU Jian-Bo
2010, 24(3): 187-191 . doi: 10.11858/gywlxb.2010.03.005
PDF (748)
Abstract:
A new material system for fabricating graded-density impactors was designed based on the standard design principle of graded wave-impedance materials and numerical simulation method for hypervelocity launching. The secondary Ta flyer-plate was accelerated over 9 km/s by a three-stage gun and used to...
Study on the Damping Properties of Nitrile Rubber under Pressure by Modified WLF Equation
LIU Hai-Lu, ZHAO Xiu-Ying, SONG Zhen-Yu, WU Si-Zhu, ZHANG Li-Qun
2010, 24(3): 192-200 . doi: 10.11858/gywlxb.2010.03.006
PDF (847)
Abstract:
According to time-temperature superposition, it is shown that at certain frequency, the higher temperature the lower modulus. At a certain temperature, the lower frequency the lower modulus, which indicates that elevated temperature and reduced frequency has the equivalent effects. Based on this, th...
Experimental Study on Sound-Speed of Overdriven-Detonation Product and the Thermodynamic CJ State
CHEN Jun, ZENG Dai-Peng, TAN Duo-Wang, WANG Rong-Bo
2010, 24(3): 201-205 . doi: 10.11858/gywlxb.2010.03.007
PDF (801)
Abstract:
Sound-speed data of overdriven-detonation product are fundamental to model EOS, and CJ data are important to manifest detonation properties of explosive. Using rarefaction wave chasing technique, the sound-speeds in overdriven detonation product at different pressures are measured with optic-fiber p...
Ultrasonic Velocity Measurement and Pressure Calibration of Single Crystal MgO under Hydrostatic Pressure Load
ZHANG Yi, BI Yan, CAI Ling-Cang, XU Ji-An
2010, 24(3): 206-212 . doi: 10.11858/gywlxb.2010.03.008
PDF (816)
Abstract:
By measuring the sound velocity of single crystal MgO at high pressures and using the high pressure Brillouin scattering data, the pressures point by point (the oil-pressure points range from 15 MPa to 51 MPa with step of 2 MPa) in a wide pressure range in the cubic pressure cell under hydrostatic l...
Study on Phase Transition and Spallation of Pure Iron under Given Pressure
CHEN Yong-Tao, LI Qing-Zhong, TANG Xiao-Jun, LU Qiu-Hong
2010, 24(3): 213-218 . doi: 10.11858/gywlxb.2010.03.009
PDF (665)
Abstract:
By means of VISAR and metallography, phase transition and spalling behavior in pure iron under the given pressure were studied through symmetric and same thickness flyer/sample experiments. In combination with the experimental results from references, and the loading and unloading histories and phas...
Difference Scheme for Modifying the Experimental Temperature in High-Temperature SHPB Test
SHANG Bing, WANG Tong-Tong, ZHUANG Zhuo
2010, 24(3): 219-224 . doi: 10.11858/gywlxb.2010.03.010
PDF (785)
Abstract:
The governing equations of the waves transmitting in the waveguide bar with temperature gradient were dispersed using difference scheme, and then the strain information of any point in the bar was calculated through one point's strain information using computer procedure. One experiment was designed...
First-Principles Study of Structural Stabilities, Electronic and Optical Properties of CaF2 under High Pressure
YANG Xiao-Cui, ZHAO Yu-Wei, GAO Zhong-Ming, LIU Xin, ZHANG Li-Xin, WANG Xiao-Ming, HAO Ai-Min
2010, 24(3): 225-230 . doi: 10.11858/gywlxb.2010.03.011
PDF (781)
Abstract:
An investigation on the structural stabilities and electronic properties of CaF2 under high pressure was conducted using first-principle calculation based on density functional theory (DFT) with the plane wave basis set as implemented in the CASTEP code. Our results demonstrate that the sequence of ...
The Coloration Process Study on the Synthesis of cBN by hBN-LiH/hBN-Li3N-B System
JI Xiao-Rui, YANG Da-Peng, YANG Xiao-Hong, ZHANG Tie-Chen
2010, 24(3): 231-236 . doi: 10.11858/gywlxb.2010.03.012
PDF (623)
Abstract:
Using hBN-LiH or hBN-Li3N-B as starting materials, we synthesied black cBN crystals under high pressure and high temperature. The results of Raman spectrum show that the reason why cBN crystals become black is that the redundant B atoms get into them. The cBN crystal is synthesized in hBN-Li3N-B sys...
The High-Pressure Synthesis of Cubic Boron Nitride Crystals with Various Shapes in Li-Based System
YANG Da-Peng, JI Xiao-Rui, LI Ying-Ai, ZHANG Tie-Chen
2010, 24(3): 237-240 . doi: 10.11858/gywlxb.2010.03.013
PDF (694)
Abstract:
By high pressure and high temperature (HPHT) method, we used hexagonal boron nitride (hBN) as raw materials, Li3N, Li3N+LiH, LiH, LiH+LiNH2, Li3N+LiNH2 as catalyst, and successfully prepared thick plate, spherical, octahedron or hex-octahedron, flat cone and flaky hexagon morphology cubic boron nitr...

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