高压物理学报

Theoretical Calculation for the Hugoniot Curves of Liquid Nitrogen

YANG Xiang-Dong, XIE Wen, WU Bao-Jian, HU Dong, JING Fu-Qian

1998, 12(1): 1-7 . doi: 10.11858/gywlxb.1998.01.001

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Abstract:
The shock compression properties of liquid nitrogen are studied by means of the improved WCA theory considering the soft-sphere correlation. The excess free energy is calculated using the six exponent potential and Ross' variational fluid perturbation theory. Our theoretical Hugoniot curves agree wi...

Research on Errors in Situ of Magnetic Measurement in High Hydrostatic Pressure Vessel－(1) The Influence of Leakage Flux

SU Fang

1998, 12(1): 8-16 . doi: 10.11858/gywlxb.1998.01.002

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Abstract:
In order to research the influence of leakage flux in high hydrostatic pressure vessel, we have measured the magnetization curve under five different ambient conditions, then compared the B-H curve measured on table far from iron with B-H curve measured in situ in pressure vessel. Finally we calcula...

Study on Thermal Stability of Nanotubes under High Pressure

ZHANG Ming, HE Duan-Wei, ZHANG Xiang-Yi, XU Ying-Fan, WANG Wen-Kui, LIANG Ji, WEI Bing-Qing, WU De-Hai

1998, 12(1): 17-21 . doi: 10.11858/gywlxb.1998.01.003

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Abstract:
In this paper, the thermal stability of nanotubes under 5.5 GPa was studied by X-ray diffraction and transmission electron microscopy. According to previous research results, at high vacuum and ambient pressure, the structure of nanotubes will be kept below temperature of 3 000 K. However, in our st...

Properties of Solid Hydrogen at High Pressure

CUI Tian, ZOU Guang-Tian, HAN Jie, Whaley K B

1998, 12(1): 22-27 . doi: 10.11858/gywlxb.1998.01.004

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Abstract:
The path integral Monte Carlo method with a constant pressure ensemble is used to study the equation of state of solid hydrogen with translational and rotational degrees of freedom. The results are in quantitative agreement with the experimental data. For understanding the quantum nature of the soli...

Equation of State of Liquid CO2 at High Temperature and High Densities

LIU Fu-Sheng, CHEN Xian-Meng, CHEN Pan-Sen, SUN Yue, JING Fu-Qian

1998, 12(1): 28-33 . doi: 10.11858/gywlxb.1998.01.005

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Abstract:
In this work the shock compression behavior of liquid CO2 is investigated using the two-stage light-gas gun and the cryogenic target established by ourselves. Six new Hugoniot data ranging from 20～60 GPa are obtained. On the basis of these data points, the parameters in the effective potentials of C...

Experiments of Needle-Like Diamond Synthesis and Its Formation Mechanism

LIU Qiang, LUO Xiang-Jie, DING Li-Ye

1998, 12(1): 34-39 . doi: 10.11858/gywlxb.1998.01.006

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Abstract:
The regular needle-like diamond were synthesized in the FeFe55Ni29Co16+B4C system at high temperature and high pressure conditions of 1 470 ℃ and 5.9 GPa, which are seldom seen in the experiments of diamond synthesis. The Fe55Ni29Co16+B4C system is compared with the Ni70Mn25Co5+B4C system and the ca...

Simulation of Shock Compression Behavior of Mixture by Using the Finite Element Method

LIN Hua-Ling

1998, 12(1): 40-46 . doi: 10.11858/gywlxb.1998.01.007

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Abstract:
In this paper, the shock compression behavior of mixture is simulated by using a three-dimensional finite element code. The mixture is as a randomly distributed component grains in space. As an example, the mixture composed of copper and aluminum is calculated and the result is compared with the sup...

Applying Genetic Algorithm to Determine Parameters in Equation of State

JIANG Hou-Man, ZHANG Ruo-Qi, ZHANG Shou-Qi

1998, 12(1): 47-53 . doi: 10.11858/gywlxb.1998.01.008

PDF (853)

Abstract:
Genetic algorithms (GA), emulating the wonderful mechanism of evolution and natural selection of living organisms in nature, are regarded to be among the most promising optimization techniques. In this paper, a genetic algorithm was implemented to decide the target Grneisen-Hugoniot EOS parameters, ...

Measurement of Grneisen Parameter of Aluminum at High Pressure

WANG Zhu-Ming, XIE Hong-Sen, GUO Jie, XU Ji-An

1998, 12(1): 54-59 . doi: 10.11858/gywlxb.1998.01.009

PDF (718)

Abstract:
Using a quasi-adiabatic method, and measuring the temperature change in the compressive process, we can directly determine the Grneisen parameter in various materials. In the world, only one laboratory had performed such a technique in the high pressure system in which the liquid transmit medium was...

The Heat Treatment of the Residual Stress Relieved for Explosive Welded Stainless Steel/Carbon Steel Cladded Plate

WANG Zhi-Ping, HE Zhi, LI Qiang, GAO Guo-Qing

1998, 12(1): 60-66 . doi: 10.11858/gywlxb.1998.01.010

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Abstract:
The heat treatment of explosive welded stainless steel/carbon steel cladded plates was conducted in order to relieve the residual stress near the welded interface. The mechanical performances of the samples and the microhardness curves of both sides of interface were measured. The compositions of bo...

Experimental Research for Penetration of Simulated Projectile into Concrete Targets

ZENG Jian-Rong, LIU Gao-Min, WEN Dian-Ying, LIU Quan-Zhong

1998, 12(1): 67-71 . doi: 10.11858/gywlxb.1998.01.011

PDF (831)

Abstract:
For three projectiles which size are reduced in proportion, the impact velocities and penetration process were measured and photographed by using the technique of electric probe and framing camera. The maxima of penetration depth corresponding to each impact velocity have been obtained, and through ...

Shock Hugoniot Relation of JB-9001 Insensitive High Explosive

YU Chuan, CHI Jia-Chun, LIU Wen-Han, LI Liang-Zhong, YANG Shu-Ying

1998, 12(1): 72-77 . doi: 10.11858/gywlxb.1998.01.012

PDF (666)

Abstract:
Shock Hugoniot relation is the basic characteristic parameters of explosive. JB-9001 is a plastic bonded explosive which mainly contains TATB. JB-9001 explosive and standard material LY12 samples were processed and their sizes are same. Two samples are symmetrically put on the LY12 base plate. One d...

1998 Vol. 12, No. 1

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