高压物理学报

Experimental Study of Methane Hydrate Prepared through Reaction of Al4C3 with H2O

LI Wen-Qiang, KOU Zi-Li, LI Wen-Yong, WANG Zhao, ZHANG Wei, HE Duan-Wei

2011, 25(4): 289-295 . doi: 10.11858/gywlxb.2011.04.001

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Abstract:
Methane hydrate is successfully prepared through the reaction of Al4C3 and H2O using a laboratory designed high pressure hydrate apparatus. Experimental results indicate that this method is an effective solution to introduce CH4 in the synthetic experiments of methane hydrates, and the pressure-temp...

A System for Measuring Two-Stage Light Gas Gun Projectile Velocity with Laser Screen and Photodetector

DENG Yun-Fei, ZHANG Wei, JIA Bin, PANG Bao-Jun, CAO Zong-Sheng

2011, 25(4): 296-302 . doi: 10.11858/gywlxb.2011.04.002

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Abstract:
A new velocity measurement system is set up for measuring the millimetresized projectile velocity in two-stage light gas gun. The system consists of an installation platform and a laser velocimeter which using red light semiconductor laser as lamp-house and silicon photodiode as photodetector. The ...

Use and Pressure Calibration of 1 000 Tons Walker Module High Pressure and High Temperature Apparatus

YANG Bin, LU Feng-Guo, ZHAO Xu-Dong, LIU Xiao-Yang

2011, 25(4): 303-309 . doi: 10.11858/gywlxb.2011.04.003

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Abstract:
The two-stage 1 000 tons Walker module large-volume high temperature and high pressure apparatus can generate different pressures with different truncated edge lengths of anvils (12, 8, 6, and 4 mm). If tungsten carbide is chosen as an anvil, the maximum pressure obtained is above 20 GPa. The sample...

A Novel Strain Type High Chamber Pressure Test System

LI Xin-E, ZU Jing, XU Peng

2011, 25(4): 310-316 . doi: 10.11858/gywlxb.2011.04.004

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Abstract:
According to the characteristics of electronic piezo gauge, a novel strain type high chamber pressure test system is developed, which takes the end cover of the electronic piezo gauge as an elastic sensitive component. The mechanical characteristics of electronic piezo gauge shell are analyzed using...

Thermoelectric Properties of AgSbTe2-Sb2Te3 Prepared by High Pressure Synthesis

SU Tai-Chao, ZHANG Shu-Guang, LI Xiao-Lei, MA Hong-An, LI Shang-Sheng, JIA Xiao-Peng, 

2011, 25(4): 317-320 . doi: 10.11858/gywlxb.2011.04.005

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Abstract:
The p-type thermoelectric materials of AgSbTe2 alloyed with Sb2Te3 ((AgSbTe2)1-x(Sb2Te3)x, 0x0.3) are prepared by high pressure method. The structure and thermoelectric properties of (AgSbTe2)1-x(Sb2Te3)x are studied at room temperature. Experimental results indicate that the samples are near single...

Yield Strength Analysis of Tantalum in Quasi-Isentropic Compression

ZHANG Hong-Ping, WANG Gui-Ji, LI Mu, ZHAO Jian-Heng, SUN Cheng-Wei, TAN Fu-Li, MO Jian-Jun, ZHU Wen-Jun

2011, 25(4): 321-326 . doi: 10.11858/gywlxb.2011.04.006

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Abstract:
For analyzing the quasi-isentropic compression experimental data of solid materials, a backward integration method with strength effect is presented based on rate-dependent constitutive equation and fluid elastic-plastic model. From the quasi-isentropic compression data of tantalum on CQ-1.5 with a ...

Study on Effect Mechanism of Aspect Ratio for Vertical Penetration of a Long-Rod Projectile

GAO Guang-Fa, LI Yong-Chi, HUANG Rui-Yuan, DUAN Shi-Wei

2011, 25(4): 327-332 . doi: 10.11858/gywlxb.2011.04.007

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Abstract:
The penetration depth is analyzed for a long-rod projectile penetrating semi-infinite target using dimensional theory. Combining numerical simulation and empirical formula studies, the effect mechanism of aspect ratio is systematically investigated. The results show that the normalized energy densit...

Equation of Penetration and Crater Growth by Shaped Charge Jet under the Influence of Shock Wave

XIAO Qiang-Qiang, HUANG Zheng-Xiang, GU Xiao-Hui

2011, 25(4): 333-338 . doi: 10.11858/gywlxb.2011.04.008

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Abstract:
When the penetration velocity is greater than the sound speed, a shock wave will be formed which leads the state parameters of the material change after shock wave front. As the shock wave affects the process of jet penetration and crater growth, Bernoulli equation can not be used directly across sh...

Penetration Analysis of a Rod-Shaped Projectile in Semi-Infinite Target

JIANG Jian-Sheng, WANG Zheng, LIANG Long-He, HONG Tao

2011, 25(4): 339-343 . doi: 10.11858/gywlxb.2011.04.009

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Abstract:
When analyzing the penetration of a rod-shaped projectile in semi-infinite target, the velocity gradient of the shaped charge jet is taken into account. The jet is divided into a series of segments, and the variations of the length and diameter of each jet segment are calculated at the moment of imp...

Temperature Change and Microstructure Evolution of the Bore Penetrated by Copper Jets

CHEN Hao, TAO Gang

2011, 25(4): 344-350 . doi: 10.11858/gywlxb.2011.04.010

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Abstract:
After metal jets penetrate the steel target, the jets' material adheres on the penetration channel wall. The research on the jets' material is helpful to analyzing the dynamic superplastic deformation and morphological changes of jets in the process of penetration and cooling. Theoretical computatio...

Conditions Analysis of Laser-Driven Plasma Jet

LI Mu, SUN Cheng-Wei, ZHAO Jian-Heng, LUO Zhen-Xiong, ZHONG Jie

2011, 25(4): 351-358 . doi: 10.11858/gywlxb.2011.04.011

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Abstract:
Laser-driven plasma jets provide a new way to simulate astrophysical jets and generate shockless loading in solids to high pressures, which are very important in the researches of high energy density physics. The experiments are all under the conditions with very high laser intensity in literatures,...

Experimental Research of Deflagration to Detonation Transition of Epoxypropane-Aluminum-Air Mixtures in Large-Scale Tube

CHEN Mo, BAI Chun-Hua, LIU Qing-Ming

2011, 25(4): 359-364 . doi: 10.11858/gywlxb.2011.04.012

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Abstract:
Motivated by the current interest in the mechanism of the deflagration to detonation transition (DDT), the DDT experiments of epoxypropane-air mixture and epoxypropane-aluminum-air mixture are carried out by a large-scale tube (32.4 m long and 0.199 inner diameter). The processes of DDT in multi-pha...

Calculation and Experiment of Overdriven Detonation Parameters of C2H2-O2 Mixture

WANG Jian, DUAN Ji-Yuan, HUANG Wen-Bin, ZHAO Ji-Bo, WEN Shang-Gang, TAN Duo-Wang

2011, 25(4): 365-369 . doi: 10.11858/gywlxb.2011.04.013

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Abstract:
Based on the C-J theory and polytropic gas equation of state, a simple physical model is developed to calculate the parameters of overdriven detonation wave for C2H2-O2 mixture with a stoichiometric ratio. The overdriven detonation experiments are also performed in a shock tube using a high speed di...

Numerical Simulation of the Response of Reinforced Concrete Slabs to Projectile Impact or Explosive Loading

MENG Yang, WEN He-Ming

2011, 25(4): 370-378 . doi: 10.11858/gywlxb.2011.04.014

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Abstract:
Numerical simulation is first conducted herein of the perforation of reinforced concrete slabs by an ogival-nosed projectile using LS-DYNA. The triaxial test data reported in this paper for the 48 MPa concrete are used to determine the values of the parameters employed in the Holmquist-Johnson-Cook ...

Molecular Analysis of Stable Mutagenesis in Cucumber Induced by High Hydrostatic Pressure

SHI Wei-Guang, WU Hui-Jie, ZHOU Guo-Qiang, JIANG Qi-Feng, CUI Yin-Qiu, LIU Xiao-Yang

2011, 25(4): 379-384 . doi: 10.11858/gywlxb.2011.04.015

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Abstract:
Two mutant cucumber lines are obtained from the Tianjin cucumber cultivar S9925-3 after treatment with high hydrostatic pressure. DNA fingerprint analyses are performed for the two mutants and their parental wild-type cucumber cultivars by AFLP (Amplified Fragments Length Polymorphism) analysis. A t...

2011 Vol. 25, No. 4

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