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

2005 Vol. 19, No. 2

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Determination of the Input Parameters B0K, B0K and 0K for 0 K Universal Isothermal Equation of State
WU Qiang, JING Fu-Qian, LI Xin-Zhu
2005, 19(2): 97-104 . doi: 10.11858/gywlxb.2005.02.001
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Abstract:
A method that is independent of the concrete forms of the isothermal equation of state is proposed to accurately determine the input parameters, which are the isothermal bulk modulus B0K, its first pressure derivative B0K and the specific density 0K at zero pressure and 0 K temperature, directly fro...
A New Conceptual Model to Describe Spallation
CHEN Da-Nian, YU Yu-Ying, YIN Zhi-Hua, LIU Guo-Qing, WANG Huan-Ran, XIE Shu-Gang
2005, 19(2): 105-112 . doi: 10.11858/gywlxb.2005.02.002
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Abstract:
A new conceptual model to describe spallation was presented basing on the original Cochran-Banner spall model. The strength function given by Cochran-Banner was maintained using the redefined damage, and the correction concerning the volume of the mesh cells was realized considering it unnecessary t...
Evaluation for Uncertainty of Particle Velocity in Hugoniot Measurements
DAI Cheng-Da, WANG Xiang, TAN Hua
2005, 19(2): 113-119 . doi: 10.11858/gywlxb.2005.02.003
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Abstract:
Uncertainty of particle velocity (u) was systemically analyzed in terms of the general guide to uncertainty evaluation, focusing on two principal types of Hugoniot measurementsflyerplate-impact experiment and relative measurement. The uncertainties of the shock velocity (D), shock pressure (p), comp...
Experimental Study on the Process of Fuel Explosive Dispersion
GUO Xue-Yong, HUI Jun-Ming, XIE Li-Feng
2005, 19(2): 120-126 . doi: 10.11858/gywlxb.2005.02.004
PDF (603)
Abstract:
Local records of static explosion were taken by the high-speed video for the 3 kinds of FAE devices. On the analysis of experimental data, the process of fuel explosive dispersion was divided into three regimes: Ejection stage, transition stage and expansion stage, based on the radical expanded velo...
An Experimental Study on Shock Response of No-Co Steel
GUI Yu-Lin, WANG Yan-Ping, LIU Cang-Li, SUN Cheng-Wei, ZHANG Ke-Ming
2005, 19(2): 127-131 . doi: 10.11858/gywlxb.2005.02.005
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Abstract:
In this paper, the shock response of no-Co steel is studied, in the impact pressure range from 3 GPa to 20 GPa. The two-wave structural profile of the free surface velocities are recorded by a velocity interferometer system for any reflector (VISAR). Using the material longitudinal elastic wave spee...
A Study of Penetration Hole Diameter in Thin Al-Plate by Hypervelocity Impact of Al-Spheres
GUAN Gong-Shun, ZHANG Wei, PANG Bao-Jun, HA Yue
2005, 19(2): 132-138 . doi: 10.11858/gywlxb.2005.02.006
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Abstract:
All spacecraft in low orbit are subjected to hypervelocity impacts by meteoroids and space debris, which can lead to significant damage and catastrophic failure. Investigation into the impact damage characteristics has become an important problem for spacecraft protection designing. In this paper, b...
Research on Constitutive Relation of a Polymer Bonded Explosive and Pressed Comp.B
WU Hui-Min, LU Fang-Yun
2005, 19(2): 139-144 . doi: 10.11858/gywlxb.2005.02.007
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Abstract:
Compressive behaviors of a polymer bonded explosive (PBX) and pressed Comp.B have been tested by means of a hydraulic material test machine at different strain-rates. Stress-strain curves of the materials at different strain rates have been obtained in this paper. According to the study on the mecha...
Analysis of Energy Deposition Caused by Micro-Void Collapse in Explosive Consolidation of Powders
WANG Jin-Xiang, LI Xiao-Jie, YAN Hong-Hao
2005, 19(2): 145-150 . doi: 10.11858/gywlxb.2005.02.008
PDF (843)
Abstract:
In this paper, the mechanism of distortion and energy deposition at the interface of the particles in explosive consolidation of powders is analyzed. A one-dimension model of spherical symmetry is used to describe the closure of the micro-holes in powders. Effect of heat conduction is added to the o...
Numerical Simulations on Buckling Failure of Preloaded Cylindrical Shell Irradiated by High Power Laser Beam
WANG Ji, WANG Xiao-Jun, WANG Feng, ZHAO Kai
2005, 19(2): 151-158 . doi: 10.11858/gywlxb.2005.02.009
PDF (812)
Abstract:
With finite-element software ANSYS 7.0 and simple thermal-mechanical coupling constitutive relations, the buckling failure of preloaded shell irradiated by high power laser beam was studied by numerical simulations. Buckling mode and buckling critical loading were analysed for different preloading c...
Analysis of Interatomic Separation-Pressure Relations for Alkali Halides and Periclase (MgO)
LIU Quan, CHEN Li-Rong
2005, 19(2): 159-163 . doi: 10.11858/gywlxb.2005.02.010
PDF (804)
Abstract:
A new method for the determination of interatomic separation-pressure relations is investigated and applied for alkali halides and MgO crystals. The method is developed by using Hildebrand approximation and an ionic model based on Harrison's treatment of overlap repulsive potential which takes into ...
Shock Compression Experiments for the Nonyl Phenol Polyethyleneoxy Ether
ZHANG Xiu-Lu, YUAN Chang-Ying, SUN Yue, WEI Jian-Jun, DONG Shi, WU Guo-Dong
2005, 19(2): 164-168 . doi: 10.11858/gywlxb.2005.02.011
PDF (761)
Abstract:
A series of dynamic high pressure loadings to the organic macromolecular emulsion－nonyl phenol polyethyleneoxy ether (C35H64O11) are carried out on a two-stage light gas gun. Within the shock pressure range of 11~42 GPa, seven Hugoniot data of the substance are obtained. The experimental results sho...
Numerical Simulation of the Interactions between Hyperpressure Waterjet and Explosive
HE Yuan-Hang, LI Hai-Jun, ZHANG Qing-Ming
2005, 19(2): 169-173 . doi: 10.11858/gywlxb.2005.02.012
PDF (1148)
Abstract:
The interactions between the high-speed waterjet of 500 m/s and the condensed explosive have been simulated by LS-DYNA3D code with Lagrange method. The pressure distributions in the explosive at different times and the pressure histories at different elements of the explosive have been calculated. O...
Experimental Investigation of the Release Isentropes for OFHC Copper
SONG Ping, CAI Ling-Cang, ZHOU Xian-Ming, TAN Hua
2005, 19(2): 174-178 . doi: 10.11858/gywlxb.2005.02.013
PDF (867)
Abstract:
The release isetropes of oxygen-free copper have been measured by explosive loading technique, in which brass is used as the flyer material, copper as the material both for baseplate and sample, and HR2-steel, SiO2-heavyglass, LY12/LF6 Al, MB2 alloy, PMMA and air as the anvil materials. The results ...
Influence of Ultra High Pressure on Peroxidase Pectin Methyl Esterase and Soluble Protein in Litchi Fruit
HUANG Li, SUN Yuan-Ming, PAN Ke, CHEN Bai-Nuan, LIANG Di-Wen, CHEN Guo-Lian, YU Hong-Ying
2005, 19(2): 179-183 . doi: 10.11858/gywlxb.2005.02.014
PDF (995)
Abstract:
In order to investigate the effects of ultra high pressure (UHP) on the content of soluble protein, peroxidase (POD) and pectinmethylesterase (PME) in litchi fruit, the pulp of litchi (Litchi chinensis Sonn cv. Huaizhi) was subjected to UHP treatment (100~400 MPa for 30 min at 10 ℃). The activities ...
The Influence of Temperature on Photoemission from Silver Nano-Particles Embedded BaO Thin Film
YANG Hai, HUANG Rui-Qin, ZHANG Tao, ZHOU Shao-Hong, HAO Jian-Ming, MA Yong
2005, 19(2): 184-188 . doi: 10.11858/gywlxb.2005.02.015
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Abstract:
The Dependence of the spectral distribution of photoemission from silver nano-particles embedded in BaO semiconductor thin film on temperature are predicted and investigated theoretically. At high temperature the photoemission response curves to wavelengths from 0.2 to 0.8 m are given. It is showed ...
Density Functional Studies on the Bond Dissociation Energy and Pyrolysis Mechanism of Propyl Nitrate
ZHANG Fang-Pei, CHENG Xin-Lu, LIU Zi-Jiang, HU Dong, LIU Yong-Gang
2005, 19(2): 189-192 . doi: 10.11858/gywlxb.2005.02.016
PDF (770)
Abstract:
The geometry of propyl nitrate was fully optimized using the B3LYP method of density functional theory (DFT) and the standard 6-31G* basis set. The bond dissociation energy of propyl nitrate was calculated. Calculations show that the weakest bond is ONO2 and the less weak bond is CO. The pyrolysis m...

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