高压物理学报

Influence of H Additive on the Synthesis of cBN and Temperature-Distribution in the Anvil

BU Yu-Zhou, GUO Wei-Li, MA Hong-An, CHEN Li-Xue, JIA Xiao-Peng

2005, 19(1): 1-4 . doi: 10.11858/gywlxb.2005.01.001

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Abstract:
The influence of H in using Li3N as catalyst on the synthesis of cBN under high-temperature and high-pressure has been investigated. From the observation of cBN crystals growth within the sample capsule, the temperature gradient distribution has been discussed.

Pressure Effects on the Band Structure of BCC Lithium with Substitutional Hydrogen Defect

LIU Zhi-Ming, CUI Tian, HE Wen-Jiong, ZOU Guang-Tian, WEI Meng-Fu, CHEN Chang-An

2005, 19(1): 5-9 . doi: 10.11858/gywlxb.2005.01.002

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Abstract:
The pressure effects on the band structure of bcc lithium with substitutional hydrogen defect are studied by using ab initio pseudopotential-plane wave method at 0 K temperature. Even though the impurity hydrogen atom localizes a free electron in the sea of metallic valence electrons, the doped syst...

Application of the Velocity Potential Model to Penetration Study

WANG Zheng, NI Yu-Shan, CAO Ju-Zhen, ZHANG Wen, JIN Wu-Gen

2005, 19(1): 10-16 . doi: 10.11858/gywlxb.2005.01.003

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Abstract:
With the application of Rubin's penetration theory and the velocity potential model, some new results of penetration problem are presented in this paper. A code according to this model was written to calculate penetration problems of long rod projectile with conical-nose, ogive-nose and spherical no...

Numerical Simulation of Different Cavities Compression by the High Pressure

BAI Jing-Song, LI Ping, ZHONG Min, JIANG Yang, ZHANG Zhan-Ji, YU Ji-Dong

2005, 19(1): 17-23 . doi: 10.11858/gywlxb.2005.01.004

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Abstract:
We have applied the combination of PPM and VOF methods with Lagrange-Remapping algorithm for simulation of the various cavities compressed by the high pressure loading. The physical processes of the multi-fluid interactions are calculated in high accuracy. This method also shows the potential for de...

One-Dimensional and Two-Dimensional Computation of Metal Spallation Induced by Laser

TAN Fu-Li, LI Yong-Chi, GUO Yang, CAO Jie-Dong

2005, 19(1): 24-28 . doi: 10.11858/gywlxb.2005.01.005

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Abstract:
A thermo-visco-plastic constitutive relation for the metal, which can cover plastic hardening (softening) behaviors, thermo-softening behaviors and damage-softening behaviors, is adopted in the numerical computation for analyzing the metal spallation induced by laser. Computations are carried out in...

Experimental Study on Impedance Spectra of Iherzolite under High Temperature and High Pressure

DAI Li-Dong, LI He-Ping, LIU Cong-Qiang, SU Gen-Li, CUI Tong-Di, SHAN Shuang-Ming, YANG Chang-Jun, LIU Qing-You

2005, 19(1): 29-34 . doi: 10.11858/gywlxb.2005.01.006

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Abstract:
The electrical conductivities of the iherzolite were measured by virtue of SARLTON-1260 frequency and phase impedance spectroscopy analyzer in situation of 1.0~4.0 GPa, 1 073~1 573 K and 10-1～107 Hz frequency ranges. The experimental results indicate that the complex impedance spectra of iherzolite ...

Ultrasonic Measurement and Isothermal Equation of State for LY12Al under Static Pressures

ZHANG Ting, BI Yan, ZHAO Min-Guang

2005, 19(1): 35-40 . doi: 10.11858/gywlxb.2005.01.007

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Abstract:
The sound velocities of longitudinal wave and transverse wave for LY12Al were measured under static pressures using pulse echo overlap technique. According to the bulk modulus at zero pressure, KS0, and its pressure derivative KS0 yielded from the ultrasonic meansurements under very low pressures (0...

Study on High Pressure Physical Properties of Diesel Oil

ZHANG Jian-Ming, ZHANG Wei-Gang, WANG Ya-Wei, WANG Xiao-Dong

2005, 19(1): 41-44 . doi: 10.11858/gywlxb.2005.01.008

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Abstract:
The physical properties of diesel oil are the base of simulating high pressure fuel injection system, where the pressure and temperature fluctuation are significant. The density, bulk modulus, kinematic viscosity and vapor pressure of diesel oil are studied by experiments in this paper, from which t...

Magnetic Field and Temperature Effects on the Self-Trapping Energy of the 2-D Spin Magnetopolaron in an InAs Crystal

LI Zi-Jun, LI Gang

2005, 19(1): 45-50 . doi: 10.11858/gywlxb.2005.01.009

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Abstract:
Under the circumstances of magnetic field, high pressure and high temperature, the influence of the electron-spin on the self-trapping energy of the weak-coupling 2-D magnetopolaron was studied by using unitary transformations and the linear combination operator method. Numerical calculation, with I...

Deformation and Perforation of Simply-Supported Circular Plates Struck Normally by Flat-Faced Projectiles

Wen He-Ming, Rao Wei-Feng

2005, 19(1): 51-58 . doi: 10.11858/gywlxb.2005.01.010

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Abstract:
A previously proposed approximate quasi-static theoretical method is employed herein to examine the deformation and perforation of a simply-supported circular plate struck by a flat-faced projectile at normal incidence. Based on the principle of virtual work, static load-displacement relationships a...

Analysis on the Influence of Multi-Layered Media on Stress Wave Propagation

DONG Yong-Xiang, HUANG Chen-Guang, DUAN Zhu-Ping

2005, 19(1): 59-65 . doi: 10.11858/gywlxb.2005.01.011

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Abstract:
The influence of multi-layered media on stress wave propagation characteristics has been analysed by the low velocity impact experiments and the corresponding numerical simulation. It shows that the wave amplitude and the actuation time are both affected by foamed materials in the layered media, and...

Experimental Study on the Breaking of Rock by Ultra-High Pressure Water Jetting

FENG Yun-Chun, XU Yi-Ji, ZHAO Fu-Guo

2005, 19(1): 66-70 . doi: 10.11858/gywlxb.2005.01.012

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Abstract:
Ultra-high pressure water jetting has a use for assisting mechanical breaking of rock in petroleum drilling. We found by experiment that the main factors affecting the breaking of rock are pressure, distance, speed and angle of jetting. With the pressure increasing, the breaking of rock is better an...

Expressions of Cold Specific Energy and Cold Pressure for Detonation Products

LI Yin-Cheng

2005, 19(1): 71-79 . doi: 10.11858/gywlxb.2005.01.013

PDF (1007)

Abstract:
The gas product of detonation of a secondary explosive can be described by a liquid equation of state that describes interaction between the molecules as strong repulsive and all outer heat motions of the molecule as free translations. The solid product carbon can be described as the rigid body. The...

Measurement of Blowoff Impulse in Materials Radiated by Pulsed Soft X-Ray with a Pendulum Target System

PENG Chang-Xian, TAN Hong-Mei, LIN Peng, LI Hong-Jie, MENG Gang

2005, 19(1): 80-85 . doi: 10.11858/gywlxb.2005.01.014

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Abstract:
The blowoff impulse in materials radiated by the pulsed soft X-ray on Qiangguang-Ⅰ accelerater was measured by using an impulse equipment in which the target-pendulum moves in the rotational way. For a composite radiated at average energy of 0.21 keV, pulse width of 36 ns, and fluence of 143 J/cm2, ...

Numerical Simulation of EFP Formation with Hemispherical Liner

PANG Yong, YU Chuan, GUI Yu-Lin

2005, 19(1): 86-92 . doi: 10.11858/gywlxb.2005.01.015

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Abstract:
The EFP formation with Hemispherical Liner is simulated using 2-D axisymmetric lagrangian code provided by LS-DYNA. The criterion of numerical method is discussed, and the typical processes of EFP formation, velocity and kinetic energy are studied. Differences between 6 models are analyzed, and the ...

Numerical Simulation and Experimental Study of Penetrator with Composite Structure Impacting Concrete Targets

WANG Ke-Hui, CHU Zhe, ZHOU Gang, WANG Jin-Hai, ZHU Yu-Rong, MIN Tao, HAN Juan-Ni

2005, 19(1): 93-96 . doi: 10.11858/gywlxb.2005.01.016

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Abstract:
In this paper, a kinetic penetrator with tandem warheads is designed. Numerical simulations and a series of size scaled experiments were conducted for the penetrator impacting semi-infinite concrete targets under different impact condition. The damage mechanism of the penetrator to target has been a...

2005 Vol. 19, No. 1

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