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

2004 Vol. 18, No. 2

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Research of Temperature Rise at the Particles Interface Caused by Adiabatic Friction in Explosive Consolidation of Powders
LI Xiao-Jie, WANG Jin-Xiang, ZHANG Yue-Ju, LI Rui-Yong, ZHAO Zheng
2004, 18(2): 97-102 . doi: 10.11858/gywlxb.2004.02.001
PDF (826)
Abstract:
In this paper, a slanting impaction model of two parallel plates was proposed to research the effect of friction between particles during explosive consolidation of powder. The change tendence of the interface friction of the particles with the change of temperature was analyzed, and influence of sh...
Experimental Study on the Influence of Device Parameters of FAE to Fuel Dispersion and Explosive Power
HUI Jun-Ming, ZHANG Tao, GUO Xue-Yong
2004, 18(2): 103-108 . doi: 10.11858/gywlxb.2004.02.002
PDF (756)
Abstract:
According to observation results of explosive dispersion process of FAE (fuel-air explosive) test device with fast kinematics analysis system, the different dispersion stages of fuel were characterized and the influence of specific central explosive, ratio of height to diameter and shell material to...
Thermal Vinet Equation of State and Its Applications
SUN Jiu-Xun, WU Qiang, CAI Ling-Cang, JING Fu-Qian
2004, 18(2): 109-115 . doi: 10.11858/gywlxb.2004.02.003
PDF (888)
Abstract:
Based on the Einstein model, the universal equation of state for solids proposed by Vinet et al. is extended to include the thermal effect. Employing the nearest neighbor generalized Lennard-Jones potential to describe the effective interaction between the ions, the lattice part of potential energy ...
Numerical Simulation of the Experimental Hypervelocity Launcher
BAI Jing-Song, HUA Jing-Song, Shen Qiang, DAI Cheng-Da, LI Ping, TAN Hua, ZHANG Lian-Meng
2004, 18(2): 116-122 . doi: 10.11858/gywlxb.2004.02.004
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Abstract:
Based on multi-fluid VOF and PPM methods, we develop a MFPPM shock wave physics code to simulate the experiment configuration of the hypervelocity launcher and test the resolution of the algorithms in this code. By using the MFPPM, we simulate some experimental hypervelocity launchers from Sandia Na...
Pressure Calculation for Hot and Dense Gas Mixture
LIU Hui-Ping, YUAN Jian-Min
2004, 18(2): 123-129 . doi: 10.11858/gywlxb.2004.02.005
PDF (907)
Abstract:
Based on the relativistic self-consistent average atom model, the orbital energies and wavefunctions for the bound electrons are calculated by solving the Dirac equations. The average occupation numbers at each orbital and the average ionization degree of each kind of atom are determined by the Ferm...
Abnormal Phenomenon of Laser-Drilling a Plate Underwater
XU Rong-Qing, CHEN Xiao, SHEN Zhong-Hua, LU Jian, NI Xiao-Wu
2004, 18(2): 130-134 . doi: 10.11858/gywlxb.2004.02.006
PDF (704)
Abstract:
The efficiency of laser-drilling a metal plate in water was observed higher than that in air. A new mechanical sensor based on optical deflection technique was applied to investigate the force acting on a metal in water and air respectively during laser-matter interaction. It is shown that in air th...
TEM Analysis of the Phase Transition in the Cold-Rolling Low Carbon Steel under High Pressure
ZHANG Jing-Wu, GOU Hui-Yang, ZHENG Fei, ZHANG Xin-Yu, ZHANG Xiang-Yi
2004, 18(2): 135-138 . doi: 10.11858/gywlxb.2004.02.007
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Abstract:
In this paper we investigate the recrystallization of being cold-rolled low carbon steel under high pressure and analyzes the structure of phase transition under high pressure by TEM technique. It was found that the high pressure can make the recrystallized grains ultrafine; the structure of low car...
Research on the Pressure Loss in the Generating Process of Hyperpressure Waterjet
LI Hai-Jun, HE Yuan-Hang, DUAN Zhuo-Ping, ZHANG Qing-Ming
2004, 18(2): 139-143 . doi: 10.11858/gywlxb.2004.02.008
PDF (899)
Abstract:
The pressure loss in the generating process of hyperpressure waterjet is theoretically studied in this paper. The velocities of waterjets have been measured under different conditions. On the basis of theoretical results and the experimental data, the initial parameters of the hyperpressure waterjet...
Effect of High Pressure (HP) Treatments on Polyphenoloxidase (PPO) Activity in Pear Juices
ZENG Qing-Mei, PAN Jian, XIE Hui-Ming, YANG Yi, HUANG Xun-Duan
2004, 18(2): 144-148 . doi: 10.11858/gywlxb.2004.02.009
PDF (949)
Abstract:
The effect of high hydrostatic pressure treatment (0.1~500 MPa) combined with mild heat treatment (20~60 ℃) under different pH values (3.0~7.0) on polyphenoloxidase (PPO) activity of Chinese Dangshan pear juice was investigated in this paper. Results showed that the polyphenoloxidase was activated w...
Simulated Microjet from Free Surface of Aluminum Using Smoothed Particle Hydrodynamics
WANG Pei, QIN Cheng-Sen, ZHANG Shu-Dao, LIU Chao
2004, 18(2): 149-156 . doi: 10.11858/gywlxb.2004.02.010
PDF (832)
Abstract:
Smoothed Particle Hydrodynamics (SPH) is a meshless Lagrangian hydrodynamic computational technique, and the form of SPH equations is simple. An obvious advantage of SPH is that it is meshless, thus large deformation calculations can be easily done with no connectivity complications. In this paper, ...
A Kind of Anodized Aluminium Shock Wave Detectors
SUN Yue, YUAN Chang-Ying, ZHANG Xiu-Lu, WU Guo-Dong
2004, 18(2): 157-162 . doi: 10.11858/gywlxb.2004.02.011
PDF (1065)
Abstract:
For making a layer of insulated film, which are both thin, intact, even, compact, and with a higher electric insulating intensity, on a shaped pure aluminium wire (35 mm in length and 1 mm in diameter), we first measured a polarized curve of one half hemispherical end of the aluminium wire based on ...
A Study of Hypervelocity Impact on 3DBC/SiC Composite Material Dual-Plate Armor
LI Jin-Zhu, HUANG Feng-Lei, ZHANG Qing-Ming
2004, 18(2): 163-169 . doi: 10.11858/gywlxb.2004.02.012
PDF (826)
Abstract:
The dual-plate (or multi-layered) system, first suggested by Whipple in 1940', is a possible means of protecting spacecraft from micrometeoroid impacts. Dual plate armor consists of an outer (bumper) plate, a space, and an inner (catcher) plate. In this work, the bumper plates were SiC ceramic matri...
Stability of (Mg,Fe)SiO3-Perovskite at Lower Mantle Pressure and Temperature Conditions
ZHANG Li, GONG Zi-Zheng, LIU Hong, DENG Li-Wei, XUE Xue-Dong, JING Fu-Qian
2004, 18(2): 170-176 . doi: 10.11858/gywlxb.2004.02.013
PDF (910)
Abstract:
Shock recovery experiments of (Mg0.92,Fe0.08)SiO3 enstatite were conducted at pressure range from 60 to 110 GPa (the corresponding temperature is estimated as 2 300~4 800 K). X-ray diffraction (XRD) and infrared absorption spectra (IR) of the recovered samples indicate that: (1) The main phase of re...
The Electrical Conductivity of Pyroxenite at High Temperature and Pressure
WANG Duo-Jun, LI He-Ping, LIU Cong-qiang, YI Li, SU Gen-Li, ZHANG Wei-Gang, XU Zu-Ming
2004, 18(2): 177-182 . doi: 10.11858/gywlxb.2004.02.014
PDF (861)
Abstract:
The electric conductivity of pyroxenite has been measured at pressure of 1.0~2.0 GPa, temperature of 320~700 ℃, and frequency of 105 Hz to 12 Hz, and the conduction mechanism has been analyzed in terms of the impedance spectra. Experimental results indicated that the electric conductivity of pyroxen...
The Numerical Simulation of Solid Liner Implosion in SSS Code
LIU Qi-Tai, SUN Cheng-Wei, HU Xi-Jing
2004, 18(2): 183-187 . doi: 10.11858/gywlxb.2004.02.015
PDF (802)
Abstract:
The SSS code is an one dimensional code for shock and detonation propagations in which the elastic-plastic-hydrodynamic model is used. We modified the pressure boundary condition of SSS code and conducted some numerical simulations for liner implosion experiment. Meanwhile, using the one dimension M...
Measurement of Shock Wavefront Produced by Ejecta Loading Device
ZHENG Xian-Xu, LIU Zhen-Qing, WANG Rong-Bo, LI Zuo-You, YE Yan, ZHONG Jie, LI Ze-Ren
2004, 18(2): 188-192 . doi: 10.11858/gywlxb.2004.02.016
PDF (844)
Abstract:
The shock wavefront produced by ejecta loading device was measured by fiber-pin, and the profile of shock wavefront was acquired by numerical simulation. According to the shape of shock wavefront, the eject time at different point of debris was calculated, and some distribution characteristics of pa...

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