高压物理学报

Detonation Shock Dynamics Calibration of JB-9014 Explosive at Ambient Temperature

TAN Duo-Wang, FANG Qing, ZHANG Guang-Sheng, HE Zhi

2009, 23(3): 161-166 . doi: 10.11858/gywlxb.2009.03.001

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Abstract:
Detonation shock dynamics (DSD) is an approximation to the reactive Euler equations that allows numerically efficient tracking of curved detonation waves. The DSD parameters are the velocity curvature relation and the boundary angle. A computer code was developed to facilitate the calibration of the...

Numerical Simulation of Hypervelocity Launch of Flier Plate with Gradual Change Impedance

CHEN Lang, LIU Qun, LU Jian-Ying, GONG Zi-Zheng, GUO Xin-Wei

2009, 23(3): 167-172 . doi: 10.11858/gywlxb.2009.03.002

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Abstract:
A graded density flier plate with gradual change impedance was designed to launch the secondary flier plate in hypervelocity on a light gas gun. The impact surface of graded-density flier plate was made of magnesium, the base surface was made of tungsten, and the middle part was made of the mixture ...

Computational Design of Graded Density Impactors for Shock Loading

BAI Jing-Song, LUO Guo-Qiang, TANG Mi, HU Jian-Bo, DAI Cheng-Da, MA Yun, TAN Hua, WU Qiang

2009, 23(3): 173-180 . doi: 10.11858/gywlxb.2009.03.003

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Abstract:
The method of 1D elastic plastic hydrodynamic calculations, the mixing model of different material constituents, and the shock dynamics code of compressible fluids were verified through the overall comparisons of the calculated results with the experimental data from Lawrence Livermore National Labo...

Isothermal Equations of State of Au and Pt at Room Temperature: Implication for Pressure Scales

JIN Ke, WU Qiang, LI Xin-Zhu, CAI Ling-Cang, JING Fu-Qian

2009, 23(3): 181-188 . doi: 10.11858/gywlxb.2009.03.004

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Abstract:
Isothermal equations of state at room temperature of Au, Pt were investigated to the relative volume change of 0.5~0.6. The isothermal bulk modulus B0 K, its first pressure derivative B0 K, and the specific volume v0 K at zero pressure and temperature were derived directly from the experimental shoc...

Thermodynamic Analysis of Diamond Growth with Catalyst at HPHT

XU Bin, LI Li, TIAN Bin, FAN Xiao-Hong, FENG Li-Ming

2009, 23(3): 189-195 . doi: 10.11858/gywlxb.2009.03.005

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Abstract:
The diamond growth with Fe-based catalyst at high pressure and high temperature (HPHT) was analyzed with the determinant method of G0 in thermodynamics theory, and the changes of volume with temperature and pressure were involved in the calculation. The results show that the Fe3C phases have been fo...

Study on Strain Rate Sensitivities of FCC Metals Based on Multi-Scale Analysis

QIN Kun, YANG Li-Ming, HU Shi-Sheng

2009, 23(3): 196-202 . doi: 10.11858/gywlxb.2009.03.006

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Abstract:
Dislocation theory and molecular dynamics simulation were used to investigate the effect of atom properties on the strain-rate sensitivity of FCC metals. A method to analyze such effect is proposed. The stress dependence on dislocation velocity is identified as the key of such study and is obtained ...

Study on the Physical Explosion Character and Ejection Effect of the High-Pressurized Hydrogen Transport Device

LI Wei, ZHANG Qi

2009, 23(3): 203-208 . doi: 10.11858/gywlxb.2009.03.007

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Abstract:
High-pressured hydrogen's ejection caused by the structural failure of transport device could result in overpressure and mass fraction within the explosion limits. External flow field characters, hydrogen jet pressure, and mass fraction in the field were numerically simulated by using physical and c...

The High Pressure Structure and Isothermal Equation of State of NiO up to 67 GPa

LIU Lei, LI Xiao-Dong, LI Yan-Chun, TANG Ling-Yun, LIU Jing, BI Yan

2009, 23(3): 209-214 . doi: 10.11858/gywlxb.2009.03.008

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Abstract:
The high-pressure structure and isothermal equation of state of NiO were investigated up to 67 GPa by in situ synchrotron X-ray diffraction in a diamond anvil cell using argon as the pressure medium. No phase transition was found in this pressure range, nor the the pressure coefficient of axial rati...

Numerical and Experimental Study on Explosively Formed Projectile with Fins

LIN Jia-Jian, REN Hui-Qi, SHEN Zhao-Wu

2009, 23(3): 215-222 . doi: 10.11858/gywlxb.2009.03.009

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Abstract:
It is a new method to produce an explosively formed projectile (EFP) with fins by attaching aluminum cover on the liner. Experimental and numerical research were performed using this new method. Furthermore, the mechanism of forming fins was discussed. The new method of forming EFP with fins was sim...

Numerical Investigation on the Characteristics of Debris Clouds Produced by Hypervelocity Impact on Pressure Vessels

GAI Fang-Fang, PANG Bao-Jun, GUAN Gong-Shun

2009, 23(3): 223-228 . doi: 10.11858/gywlxb.2009.03.010

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Abstract:
SPH methods in AUTODYN-2D was used to investigate the characteristics of debris clouds propagation inside the gas-filled pressure vessels for hypervelocity impact on the pressure vessels. The effect of equation of state on debris cloud was examined. A better correlation between experimental and nume...

Effects of Liner Curvature Radius on Formation of Double-Layered Spherical Segment Charge Liner into Tandem Explosively Formed Projectile (EFP)

ZHENG Yu, WANG Xiao-Ming, LI Wen-Bin, LI Wei-Bing

2009, 23(3): 229-235 . doi: 10.11858/gywlxb.2009.03.011

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Abstract:
In order to study the influences of liner curvature radius on the formation of double layer shaped charge liner (DLSCL) into tandem explosively formed projectile (EFP), the numerical simulations on the mechanical phenomenon of DLSCL forming into tandem EFP were carried out by using two-dimensional f...

Study on the Influence of Magnetism of Synthetic Diamond Single Crystal on Their Mechanical Performances

LUO Zhong-Ping, YAO Ya-Lin, XIA Zhi-Hua, HE Bing

2009, 23(3): 236-240 . doi: 10.11858/gywlxb.2009.03.012

PDF (756)

Abstract:
Static-pressure strength, toughness index (IT) and thermal-toughness index(ITT) of each sample were analyzed on the basis of the experimental studies on the magnetic separation of diamond single crystal. The results show that the magnetism of synthetic diamond single crystal has an obvious influence...

2009 Vol. 23, No. 3

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