高压物理学报

Experiment and Numerical Simulation of Cylindrical Explosive Isostatic Pressing

CHEN Lang, LU Jian-Ying, ZHANG Ming, HAN Chao, FENG Chang-Gen

2008, 22(2): 113-117 . doi: 10.11858/gywlxb.2008.02.001

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Abstract:
The experiments of cylindrical explosive isostatic pressing were carried out. The internal temperatures in pressed explosives were measured by thermocouples. A thermal/structural coupled model of the explosive isostatic pressing was set up. The numerical simulations of cylindrical explosive were con...

Effect of Inertia on the Dynamic Behavior of Cellular Metal

LIU Yao-Dong, YU Ji-Lin, ZHENG Zhi-Jun

2008, 22(2): 118-124 . doi: 10.11858/gywlxb.2008.02.002

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Abstract:
Although the mechanical property of metal foams has been widely studied, there are some conflicting conclusions on the strain-rate effect and the inertia effect of metallic foams. For a deep understanding of the role of inertia in the dynamic response of cellular metals, finite element method is use...

Experiment Research on Spallation Strength under Deviatoric Stress

ZHANG Shi-Wen, LIU Cang-Li, LI Qing-Zhong

2008, 22(2): 125-130 . doi: 10.11858/gywlxb.2008.02.003

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Abstract:
Overstress assembly by heating is adopted to achieve pre-compression along the radial direction of disk-shaped LY12 Al samples. Different deviatoric stress can be obtained using the assembly methods. The spallation signals of these pre-compressed samples were measured with VISAR in light-gas gun sho...

Rapid Preparation and Characterization of Carbon/Zirconia Nanometer Composites

WANG Zuo-Shan, LI Feng-Sheng, LIU Yu-Cun, ZHANG Jing-Lin, LIU Jian-Xun

2008, 22(2): 131-136 . doi: 10.11858/gywlxb.2008.02.004

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Abstract:
Nanometer carbon/zirconia compound powder was synthesized via novel shock wave plasma technique. X-ray diffraction and Raman spectrum were respectively used to characterize the crystal phase composition of the compound powder. Transmission Electron Microscope was used to observe the size and appeara...

Approximately Theoretical Resolution of the Velocity of the Metallic Flyer Plates Driven by Magnetic Field

WANG Gui-Ji, SUN Cheng-Wei, JIANG Ji-Hao, MO Jian-Jun, TAN Fu-Li, ZHANG Ning

2008, 22(2): 137-141 . doi: 10.11858/gywlxb.2008.02.005

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Abstract:
Based on the energy conservation relation and some assumptions, an onedimensional physical model is proposed to predict the velocity of the metallic flyer plates driven by magnetic field. In this model, the dynamic change of the inductance in work space, the ablation energy and the magnetic field e...

Simulation of Energy Coupling of Laser and Ablated Plasma at Target Surface

TONG Hui-Feng, TANG Zhi-Ping

2008, 22(2): 142-148 . doi: 10.11858/gywlxb.2008.02.006

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Abstract:
Under the irradiation of power laser, the material of solid target surface evaporated instantly and then the vapor plasma of target generated, coupling the energy of laser beam with plasma during the laser go through the plasma field to arrive at the target surface were the main physical process of ...

Backward Integration Method for Tracing Isentropic Compression Field

WANG Gang-Hua, BAI Jin-Song, SUN Cheng-Wei, MO Jian-Jun, WANG Gui-Ji, ZHAO Jian-Heng, TAN Fu-Li, HU Xi-Jing

2008, 22(2): 149-152 . doi: 10.11858/gywlxb.2008.02.007

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Abstract:
The govering equation of hydrodynamics are discreted over time. Using a VISAR trace as initial conditions, they are numerically integrated backwards in space. A detail analysis shows good precision has gotten. The traced pressure load history at load surface is consistent with Bai's results. The ded...

Numerical Simulations of the Perforation of Aluminum Targets Struck by a Deformable Projectile

HE Tao, WEN He-Ming

2008, 22(2): 153-159 . doi: 10.11858/gywlxb.2008.02.008

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Abstract:
Numerical simulations are conducted on the perforation of aluminum targets struck by an ogive-nosed steel projectile using the commercial FEM code ABUQUS/Explicit. It is assumed that the target response can be represented by a velocity dependent forcing function which is derived from spherical cavit...

Study on Standard Cylinder Test Technology and Data Processing Method

SUN Zhan-Feng, LI Qing-Zhong, SUN Xue-Lin, WU Jian-Hua, TANG Tie-Gang

2008, 22(2): 160-166 . doi: 10.11858/gywlxb.2008.02.009

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Abstract:
Standard cylinder test technique and data processing method were studied, and new effective techniques of lighting, negative interpretation and data processing for slit scan experiments were established, and the results of displacement, velocity, acceleration and specific kinetic energy of the cylin...

The Brittle-Plastic Transition in Experimentally Deformated Quartzite

SONG Juan, ZHOU Yong-Sheng, HE Chang-Rong

2008, 22(2): 167-174 . doi: 10.11858/gywlxb.2008.02.010

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Abstract:
Deformation experiments have been conducted to investigate the brittle-plastic transition of quartzite under temperature of 500~1 000 ℃ and confining pressure of 1 251~1 440 MPa. Mechanical behavior and microstructural characteristics indicated that the brittle-plastic transition of quartzite in exp...

Synthesis of SrAl2O4: Eu2+, Dy3+ Nanometer Phosphors by Detonation and Combustion Method

QU Yan-Dong, LI Xiao-Jie, ZHAO Zheng, OUYANG Xin

2008, 22(2): 175-180 . doi: 10.11858/gywlxb.2008.02.011

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Abstract:
The SrAl2O4: Eu2+, Dy3+ (SED) nanometer phosphors were synthesized at lower temperature by detonation and combustion method, respectively. The effects of synthesis conditions, annealing temperature on the growth behavior, the particle morphologies and optical properties of the as-prepared SED partic...

Investigation of the Pre-fixed Gap in Single-Pulse Loading Technique of Hopkinson Pressure Bars

CHEN Rong, LU Fang-Yun, LIN Yu-Liang, QIN Jin-Gui

2008, 22(2): 187-191 . doi: 10.11858/gywlxb.2008.02.012

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Abstract:
In conventional Split Hopkinson Pressure Bars (SHPB) experiments, the tension pulse reflected from the sample back into the incident bar will travel to the free end of the bar and then will reflect back to the sample as compression wave. As a result, the sample is loaded many times. The single-pulse...

Raman Spectra Characterization of Cycloheptane under High Pressure

GAO Ling-Ling, MA Yan-Mei, LIU Dan, HAO Jian, JIN Yun-Xia, WANG Feng, WANG Qiu-Shi, ZOU Guang-Tian, CUI Qi-Liang

2008, 22(2): 192-196 . doi: 10.11858/gywlxb.2008.02.013

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Abstract:
In situ Raman spectra of cycloheptane have been characterized under high pressure generated by diamond anvil cell (DAC) at room temperature. The pressure is up to 17.00 GPa. With the increase of pressure, the cycloheptane experienced the liquid-solid phase transition at 0.53 GPa. During 3.45~5.58 GP...

A Vertical Shock Tube for Experimental Studies on Interfacial Instability

ZOU Li-Yong, LIU Jin-Hong, WANG Jian, HUANG Wen-Bin, TAN Duo-Wang, LIU Cang-Li

2008, 22(2): 197-202 . doi: 10.11858/gywlxb.2008.02.014

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Abstract:
A new vertical shock tube was developed in order to investigate different stages of the development of hydrodynamic interfacial instability. The versatile shock tube permits the execution of three kinds of experiments on the turbulent mixing of fluids induced by the (1) Richtmyer-Meshkov instability...

A Combined Measurement with Pyrometer and VISAR

LI Jun, ZHOU Xian-Ming, LI Jia-Bo, WANG Xiang

2008, 22(2): 203-207 . doi: 10.11858/gywlxb.2008.02.015

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Abstract:
Combined measurement with two or three different diagnostic systems in one shock-wave experiment, which could provide more information on high-pressure physical properties of materials and help people better understanding the nature of these properties, is the inexorable trend for the development of...

Numerical Study on Influencing Factors of Dynamic Response of Cylindrical Shell Subjected to Deep Water Blast Wave

JIA Xian-Zhen, HU Yi-Ting, DONG Ming-Rong, XU Xue-Zhong, LIU Jia-Cong

2008, 22(2): 208-214 . doi: 10.11858/gywlxb.2008.02.016

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Abstract:
Numerical investigation was carried out on a cylindrical shell subjected to deep water blast wave by using ABAQUS software package. The simulation contained static analysis by using ABAQUS/Standard and dynamic analysis by using ABAQUS/Explicit, and the analysis result of the former was imported into...

Effect of Boron Contained in the Catalyst on Thermal Stability of Boron-Doped Diamond Single Crystals

WANG Mei, LI He-Sheng, LI Mu-Sen, GONG Jian-Hong, TIAN Bin

2008, 22(2): 215-219 . doi: 10.11858/gywlxb.2008.02.017

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Abstract:
The synthesizing diamond experiment was carried out at cubic hinge press apparatus with iron-based catalyst made by powder metallurgy, in which hexahedral nitride boron (h-BN) was doped with different proportions. Microstructures and morphologies of the diamond single crystals were observed under st...

Microwave Radiation Measurement on Hypervelocity Impacts

MA Ping, LIU Sen, HUANG Jie, SHI An-Hua, MIAO Jun-Gang

2008, 22(2): 220-224 . doi: 10.11858/gywlxb.2008.02.018

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Abstract:
The microwave radiation intensity measurement on hypervelocity impacts were conducted with the 8 mm microwave radiometer at the hypervelocity impact facility at HAI, CARDC. The paper presented the test results of the microwave radiation resulted from hypervelocity impacts on the semi-infinite alumin...

On the Characteristics of Cavitation Formation Subjected to Underwater Blast Shock Wave

LI Hai-Tao, ZHU Xi, HUANG Xiao-Ming, MU Jin-Lei

2008, 22(2): 181-186. doi: 10.11858/gywlxb.2008.02.019

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Abstract:
On the basis of plane shock wave hypothesis, the characteristics of local cavitation and bulk cavitation formation subjected to underwater explosion were theoretically and experimentally studied. The effects of structure dimensions and shock wave parameters on the cavitation formation were analyzed ...

2008 Vol. 22, No. 2

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