高压物理学报

Discussion on the Spallation Behavior Resolved by Free-Surface Velocity Profile

HE Hong-Liang

2009, 23(1): 1-8 . doi: 10.11858/gywlxb.2009.01.001

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Abstract:
A few questions on the spallation behavior resolved by the measurement of free-surface velocity profile have been discussed. Firstly, the way from the measured free-surface velocity profile to infer the dynamic damage behavior of the target is an Inverse Problem and the theoretical model and simulat...

p-T Phase Diagram of Coesite Synthesized from Nanometer SiO2 Powder

ZHANG Guang-Qiang, XU Yue, SUN Jing-Shu, XU Da-Peng, WANG De-Yong, ZHANG Lin, XUE Yan-Feng, SONG Geng-Xin, LIU Xiao-Mei, SU Wen-Hui

2009, 23(1): 9-16 . doi: 10.11858/gywlxb.2009.01.002

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Abstract:
With nanometer SiO2 powder as initial material, the p-T phase diagram (2.0～4.2 GPa, 150～1200 ℃) of -quartz and coesite was obtained by a series of experiments under high pressure and high temperature, and the slope of the boundary in the phase diagram is negative below 650 ℃ and is basically horizon...

Stress Wave Analysis of Abnormal Spall in Metal Target Relating to Phase Transition

XU Wei-Wei, TANG Zhi-Ping, ZHANG Xing-Hua

2009, 23(1): 17-23 . doi: 10.11858/gywlxb.2009.01.003

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Abstract:
With a simple multi-phase mixture model proposed by TANG Zhi-Ping et al earlier, we have studied the propagation of the elastic and plastic waves as well as the macroscopic phase boundary in the targets by characteristic line method, and the mechanism of the abnormal spall phenomena mentioned above ...

The Effect of Thickness of Diamond Layer on Residual Stresses in Polycrystalline Diamond Compact

XU Guo-Ping, CHEN Qi-Wu, YIN Zhi-Min, XU Gen

2009, 23(1): 24-30 . doi: 10.11858/gywlxb.2009.01.004

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Abstract:
The effect of thickness of diamond layer on the residual stresses in polycrystalline diamond compact (PDC) was investigated through XRD measurement and finite element analysis (FEA) method. The results show that as the thickness of the diamond layer increases from 0.5 mm to 2.0 mm, the residual comp...

Properties of Sr8CaRe3Cu4O24 with Perovskite Structure under Pressure

LI Sheng-Ai, WANG Wei, LIU Su, WAN Xian-Gang

2009, 23(1): 31-36 . doi: 10.11858/gywlxb.2009.01.005

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Abstract:
We have investigated the mechanism and electromagnetic properties of new compound Sr8CaRe3Cu4O24 under the hydrostatic pressure by the mean of local spin density approximation and mean field theory. Then we have discussed the internal mechanisms of the high magnetic transition temperature (TC) and t...

Micro-Analysis of the Void Growth of Aluminum under Shock Loading

CUI Xin-Lin, LI Ying-Jun, ZHU Wen-Jun, QI Mei-Lan, WANG Hai-Yan, HE Hong-Liang, LIU Jian-Jun

2009, 23(1): 37-41 . doi: 10.11858/gywlxb.2009.01.006

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Abstract:
The distribution of micro-voids in aluminum under shock loading has been investigated by means of SEM (Scanning Electron Microscope) and TEM (Transmission Electron Microscope). Results show that plenty of nano-voids have been produced in the shocked aluminum. Most of the void sizes are hundred nanom...

Synthesis and Electric Transport Properties of Na-Filled CoSb3 at High-Pressure

DONG Nan, JIA Xiao-Peng, SU Tai-Chao, JIANG Yi-Ping, GUO Jian-Gang, DENG Le, MA Hong-An

2009, 23(1): 42-45 . doi: 10.11858/gywlxb.2009.01.007

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Abstract:
Skutterudite compounds Na-filled CoSb3 were successfully synthesized at high-pressure using powders of Co, NaN3 and Sb as starting materials. The X-ray diffraction (XRD) results indicate that all samples have the single phase CoSb3. No secondary phase is found when Na content wNa80%. The composition...

Constitutive Model of Pure Zirconium under High Temperature and High Strain Rate

XIAO Da-Wu, LI Ying-Lei, HU Shi-Sheng

2009, 23(1): 46-50 . doi: 10.11858/gywlxb.2009.01.008

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Abstract:
The thermo-mechanical response of zirconium has been investigated under temperature ranging from normal temperature to 1 073 K and strain rate from 4.110－4 s－1 to 2.8103 s－1. Results show that the flow stress and strain hardening rate of zirconium are very sensitive to the changes of temperature and...

Calculation of the Angle Deformation in Explosive Welding Based on the Ideal Fluid Model of Symmetrical Colliding

ZHANG Xiao-Li, WANG Jin-Xiang, LI Xiao-Jie, LIU Jia-Cong

2009, 23(1): 51-58 . doi: 10.11858/gywlxb.2009.01.009

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Abstract:
An ideal fluid model of symmetrical colliding was taken to analyze the physical deformation on streamlines in explosive welding, and a theoretical formula of the angle deformation was deduced. The language of Visual C++ was adopted to make a program to calculate the angle deformation numerically. Th...

Models for Momentum of Debris Cloud and Ejecta Produced by Hypervelocity Impacts of Aluminum Spheres with Thin Aluminum Sheets

CHI Run-Qiang, GUAN Gong-Shun, PANG Bao-Jun, ZHANG Wei, TANG Qi

2009, 23(1): 59-64 . doi: 10.11858/gywlxb.2009.01.010

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Abstract:
Debris clouds produced by the normal impact of an aluminum alloy sphere with an aluminum alloy sheet can scatter flying downrange, as well as an ejecta veil is produced at the same time. The momentum of debris clouds and ejecta are necessary to create the debris clouds and ejecta theoretical models....

Numerical Study on Penetration of Semi-Infinite Aluminum Alloy Targets by Tungsten Alloy Rod

LOU Jian-Feng, WANG Zheng, HONG Tao, ZHU Jian-Shi

2009, 23(1): 65-70 . doi: 10.11858/gywlxb.2009.01.011

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Abstract:
Used the LS-DYNA procedure to set up numerical model on penetration of semi-infinite aluminum alloy targets by tungsten alloy rod over a wide velocity range has been discussed. The mass of penetrator is about 46.7 g with a length over diameter ratio of 15. Based on experiment results from the refere...

Synchrotron Radiation X-Ray Diffraction of Carbon Nitride under High Pressure

LI Xue-Fei, ZHANG Jian, LIU Wei, MA Hong-An, CUI Qi-Liang, ZOU Guang-Tian

2009, 23(1): 71-74 . doi: 10.11858/gywlxb.2009.01.012

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Abstract:
In situ synchrotron radiation X-ray diffaction studies under high pressures and room temperature on the CN samples produced under 1 200 ℃ and 6.0 GPa have been carried out via the diamond anvil cell (DAC) technique. The results show that at room temperature and up to 44 GPa, both graphitic C3N4 and ...

Research on Behavior of Composite Material Projectile Penetrate Concrete Target

ZHONG Wei-Zhou, SONG Shun-Cheng, ZHANG Fang-Ju, ZHANG Qing-Ping, HUANG Xi-Cheng, LI Si-Zhong, LU Yong-Gang

2009, 23(1): 75-80 . doi: 10.11858/gywlxb.2009.01.013

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Abstract:
Projectiles made of carbon fiber composite material shell and metal warhead have penetrated concrete targets at the speed of 336, 447 and 517 m/s, respectively. The angles are 0 and 30 between the perpendicular of target surface and projectile axes. The thickness of concrete target is 200 mm and its...

2009 Vol. 23, No. 1

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