高压物理学报

Study on Dynamic Mechanical Behavior and Constitutive Model of Reactive Powder Concrete after Exposure in High Temperature

WANG Li-Wen, PANG Bao-Jun, CHEN Yong, ZHANG Kai

2012, 26(4): 361-368. doi: 10.11858/gywlxb.2012.04.001

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Abstract:
The dynamic mechanical behavior and rate constitutive model of reactive powder concrete (RPC) after exposure in high temperature are studied experimentally by means of split Hopkinson pressure bar system. Both the untreated specimens and those after exposure in high temperature (400, 600 and 800 ℃) ...

An Integrated Velocity Profile Measurement from Nanosecond Pulse Laser-Driven Mini-Flyer to Shocked Sample

LI Jun, LI Jia-Bo, ZHOU Xian-Ming, WANG Xiang, WENG Ji-Dong, LI Jian-Feng

2012, 26(4): 369-374. doi: 10.11858/gywlxb.2012.04.002

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Abstract:
It is very important to develop a high time and space resolved velocity diagnostic technique for laser-driven shock wave experiments. However, it is still a difficult problem because of the limited size of laser-launched mini-flyer and ultra-short loading time in shocked sample. Thus, a micro focus ...

Design of Ultra High Hydrostatic Pressure Equipment and Experimental Research on Enzyme Inactivation

YI Jian-Yong, SUN Chuan-Fan, WANG Yong-Tao, DONG Peng, WANG Huan-Yu, HU Xiao-Song

2012, 26(4): 375-381. doi: 10.11858/gywlxb.2012.04.003

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Abstract:
An ultra high hydrostatic pressure device with operating pressure of up to 1.6 GPa is designed and developed, and its design principle, structural characteristics and major technical difficulties are introduced. The structures and optimum parameters of high pressure processing chamber, sealing syste...

Experimental Study on Impedance Spectra of Albite at High Temperatures and High Pressures

HU Hai-Ying, LI He-Ping, DAI Li-Dong, SHAN Shuang-Ming, ZHU Cheng-Ming

2012, 26(4): 382-388. doi: 10.11858/gywlxb.2012.04.004

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Abstract:
The electrical conductivity of albite was in-situ measured at pressures of 1.0, 2.0 GPa and temperatures of 673-973 K using a.c. impedance spectroscopy method in YJ-3000t multi-anvil press. The experimental results indicate that the electrical conductivity () of albite ranges from 10-3.0 to 10-5.5 S...

Measurement of Electrical Resistivity of Brittle Materials under Weak Shock Compression

YANG Jia, YU Yin, JIANG Dong-Dong, ZHANG Ming-Jian, LI Yong-Hong, LIU Fu-Sheng, HE Hong-Liang

2012, 26(4): 389-394. doi: 10.11858/gywlxb.2012.04.005

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Abstract:
The property variation of brittle material is closely related to its microstructure variation under shock compression. The present work is aimed to understand such a failure process by the measurement of electrical resistivity changes under weak shock compression. After improvements on the Weir's di...

First-Principles Investigations on Structure Transformation, Elastic and Thermodynamic Properties of TiN under High Pressure

HAO Ai-Min, ZHOU Tie-Jun, ZHU Yan, LIU Xin

2012, 26(4): 395-401. doi: 10.11858/gywlxb.2012.04.006

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Abstract:
An investigation on the structure transformation, elastic and thermodynamic properties of TiN under high pressure is conducted using first-principles calculations based on density functional theory (DFT) with the plane wave basis set. At elevated pressures TiN is predicted to undergo a structural ph...

Angular Dispersion-Type Fabry-Perot Interferometer with Velocity Spectral Resolution

CHEN Guang-Hua, LI Ze-Ren, LIU Jun, LIU Shou-Xian, PENG Qi-Xian, YUAN Shu-Yun, YANG Qing-Guo

2012, 26(4): 402-408. doi: 10.11858/gywlxb.2012.04.007

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Abstract:
An angular dispersion-type Fabry-Perot interferometer is developed to measure the velocity spectrum. Using this interferometer, the interference fringes with different Doppler shift are separated from each other in space, then the Doppler shift arise from a single moving source or multiple moving so...

Research on Removing Allyl Isothiocyanates Using High Pressure Carbondioxide

HU Guo-Wei, YI Jun-Jie, YANG Ying-Jie, HU Xiao-Song, LIAO Xiao-Jun, ZHANG Yan

2012, 26(4): 409-414. doi: 10.11858/gywlxb.2012.04.008

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Abstract:
Allyl Isothiocyanates (AITC) is a degradation product of thioglycoside in the red cabbage pigment extract, which limits the industrial applications of red cabbage pigment extract. In order to solve this actual production problem, the process and possible mechanism of removing AITC using high pressur...

Numerical Simulation of the Destructive Process of Shock Loaded Alumina Ceramics Using Smoothed Particle Hydrodynamics

WANG Feng-Ying, LIU Ying-Bin, LIU Tian-Sheng, HU Xiao-Yan

2012, 26(4): 415-420. doi: 10.11858/gywlxb.2012.04.009

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Abstract:
Ceramics materials have been widely used in military projects, aerospace, aviation and ship structure protection, due to their good mechanical properties such as low density, high strength and high sound velocity. The destructive process of alumina ceramic impacted by a tungsten alloy projectile is ...

Experimental Study on Phase Transformation of TiO2 Induced by High Energy Milling

GAO Xiang, CHEN Peng-Wan, LIU Jian-Jun, XIONG Guang-Yuan

2012, 26(4): 421-425. doi: 10.11858/gywlxb.2012.04.010

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Abstract:
The mixture of TiO2 and dicyandiamide powder is processed by high energy milling at different milling speed and milling time. The structure and phase composition of the recovered samples are determined by X-ray diffraction (XRD). The results show that anatase transforms to rutile and srilankite appe...

Deflagration to Detonation Transition and Detonation Wave Structure of Aluminum-Air Mixture

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

2012, 26(4): 426-432. doi: 10.11858/gywlxb.2012.04.011

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Abstract:
Motivated by the current interest in the mechanism of the deflagration to detonation transition (DDT), the DDT process and detonation wave structure of aluminum-air mixture are investigated experimentally by a large scale tube with length of 32.4 m and inner diameter of 0.199 m. The overall DDT proc...

Study on the Magnetic Field of High Field Magnet Powered by Flux Compression Generator

XIA Ming, HUANG Zheng-Xiang, GU Xiao-Hui, WANG Ye-Zhong

2012, 26(4): 433-441. doi: 10.11858/gywlxb.2012.04.012

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Abstract:
To study magnetic field of the high field magnet powered by flux compression generator (FCG), a theoretical model is established by analysis of loading process. According to this model, a comparative study on magnetic fields of six high field magnets with different structures is carried out, and the...

Numerical Simulation of the Dispersion of Random Fragments under Asymmetrical Initiation

ZHANG Bo, LI Wei-Bing, LI Wen-Bin, WANG Xiao-Ming, GAO Xu-Dong, ZHENG Yu

2012, 26(4): 442-448. doi: 10.11858/gywlxb.2012.04.013

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Abstract:
Using AUTODYN-3D and the Stochastic random fragmentation model which based on the Mott's fragment distribution law, the scattering properties of the warhead fragments are numerically simulated and analyzed under three different ways of initiation including center point initiation, asymmetrical singl...

Effect of Impact Velocity on the Penetration Behavior for Long-Rod Penetrator Vertically Penetrating Semi-Infinite Target

GAO Guang-Fa, LI Yong-Chi, SHEN Ling-Yan, GUO Yang

2012, 26(4): 449-454. doi: 10.11858/gywlxb.2012.04.014

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Abstract:
This study is aimed at the relation between maximal penetration depth and impact velocity for a long-rod penetrator vertically penetrating a semi-infinite target. The effects of impact velocity on the maximal penetration depth are obtained by numerical simulation. The results show that the threshold...

Flame Propagation and Combustion in Methane-Coal-Air Mixture

NIU Fang, LIU Qing-Ming, BAI Chun-Hua, HE Xue-Qiu, GONG Guang-Dong

2012, 26(4): 455-461. doi: 10.11858/gywlxb.2012.04.015

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Abstract:
Combustion and explosion experiments are carried out in an explosion tank of 10 m3 for the mixture of 8% methane 75 g/m3 coal dust-air. Optical method and pressure method are adopted to obtain the laminar burning velocity, flame speed, flame thickness, Markstein length as well as the explosibility i...

Characteristic Curve Method for Movement of Flyer Driven by TNT and Emulsion Explosives with General Equation of State

LI Xiao-Jie, ZHAO Chun-Feng, YU Na, LUO Ning

2012, 26(4): 462-468. doi: 10.11858/gywlxb.2012.04.016

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Abstract:
On the basis of explosion gas dynamics, the movement of flyer plate is studied using characteristic curve difference method in this paper. In the process of difference, the basic assumption of steady detonation is used to study the law of flyer plate movement. According to the theory of two-dimensio...

Influence of Lead on the Performance of Powder Shaped Charge Liner

LIU Ying-Bin, SHEN Zhao-Wu, LIU Tian-Sheng, HU Xiao-Yan

2012, 26(4): 469-474. doi: 10.11858/gywlxb.2012.04.017

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Abstract:
In order to study the influence of lead powder on the properties of the copper-tungsten shaped charge liner, the experiments are carried out by adding 5%-20% of the lead powder to the original copper-tungsten liner. The results show that the addition of lead can reduce the porosity of liner; and wit...

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

TAN Duo-Wang, ZOU Li-Yong, ZHANG Guang-Sheng, HE Zhi, JIANG Yang

2012, 26(4): 475-480. doi: 10.11858/gywlxb.2012.04.018

PDF (506)

Abstract:
Detonation shock dynamics (DSD) method is an effective way to study the non-ideal propagation of detonation waves. Using the generalized geometrical optics model of DSD, the non-ideal propagation of detonation waves is studied for explosive grain with high slenderness ratio. A computer code is devel...

2012 Vol. 26, No. 4

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