高压物理学报

Effect of High Pressure Sintering on the Thermoelectric Properties of n-Type PbTe

CHEN Bo, SUN Zhen-Ya, LI Ming-Fa, WANG Shan-Yu, FAN Duan

2012, 26(2): 121-126. doi: 10.11858/gywlxb.2012.02.001

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Abstract:
The n-type nonstoichiometric PbTe (Pb0.55Te0.45) materials were prepared by the high pressure sintering process. The emphasis of the present study is on the influence of the pressure on the thermoelectric properties of the material. The experimental results show that the lattice defects are removed ...

Experimental Investigation on Resist Capability of Stainless Steel Mesh/Al Multi-Shock Shield by High-Velocity Impact

GUAN Gong-Shun, CHEN Li-Wen, WANG Shao-Heng, PANG Bao-Jun

2012, 26(2): 127-134. doi: 10.11858/gywlxb.2012.02.002

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Abstract:
Stainless steel mesh/Al multi-shock shield was designed by improving Al Whipple shield, and a series of high-velocity impact experiments were conducted by a two-stage light gas gun facility. Impact velocities of Al-spheres varied between 3.93 km/s and 4.25 km/s. The diameter of projectiles was 6.35 ...

Numerical Simulation of Temperature Field in Sample Assembly of Cubic Press

LIU Fang, LIU Yong-Gang, XIE Hong-Sen

2012, 26(2): 135-140. doi: 10.11858/gywlxb.2012.02.003

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Abstract:
Numerical simulation for the temperature distribution in sample assembly of cubic press was carried out by using the finite-element method with simplified model and boundary conditions. Based on the adjustment of parameters of the models in simulation, the temperature distribution induced by pressur...

Thermoelectric Properties of Nanoparticle PbTe under Hydrostatic Pressure

ZHANG Xiang-Guo, MU Xin, ZHANG Zeng-Ming, DING Ze-Jun

2012, 26(2): 141-147. doi: 10.11858/gywlxb.2012.02.004

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Abstract:
The thermoelectric properties of PbTe nanoparticles were studied from ambient pressure to 0.8 GPa by using self-built set-up. The electrical conductivity increased while Seebeck coefficient decreased with loading pressure and these properties can be recovered after pressure released. Moreover, Seebe...

Dynamic Brazilian Test and Simulation of Plastic-Bonded Explosives

FU Hua, LI Jun-Ling, TAN Duo-Wang

2012, 26(2): 148-154. doi: 10.11858/gywlxb.2012.02.005

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Abstract:
Dynamic Brazilian test of plastic-bonded explosives was investigated by split Hopkinson pressure bar (SHPB). The tensile strengths of three PBXs were acquired under different strain rates. The evolution of crack on sample surface was captured using high-speed camera. The strain field was calculated ...

Numerical Simulation of Cylindrical Shell Loaded by Explosive Rods (Ⅰ): Fluid-Structure Interaction Simulation

MAO Yong-Jian, LI Yu-Long, CHEN Ying, HUANG Han-Jun, ZHANG Qing-Ping, MIAO Ying-Gang

2012, 26(2): 155-162. doi: 10.11858/gywlxb.2012.02.006

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Abstract:
A loading test by explosive rods to simulate mechanical effects of pulsed X-ray was numerically simulated by fluid-structure interaction method. The 2-D numerical model including a cylindrical shell, two layers of rubbers, nineteen explosive rods and a layer of air was built. Therein, the two rubber...

Investigation on the Ballistic Resistance of Double-Layered A3 Steel Targets Against Blunt Projectile Impact

ZHANG Wei, XIAO Xin-Ke, GUO Zi-Tao, MU Zhong-Cheng, WEI Gang

2012, 26(2): 163-170. doi: 10.11858/gywlxb.2012.02.007

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Abstract:
Steel plates are widely used to construct resistant structures, and a lot of literature report on the ballistic resistance of metallic monolithic target. However, few reports can be found for double-layered target (DLT), especially the one with large gap space. Experimental study was conducted on th...

Experimental Investigation on the Yield Behavior of Aluminum Foams under Combined Stress States

ZHOU Zhi-Wei, WANG Zhi-Hua, ZHAO Long-Mao, SHU Xue-Feng

2012, 26(2): 171-176. doi: 10.11858/gywlxb.2012.02.008

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Abstract:
The initial yield behavior of Alporas closed-cell aluminium foams with relative density 8.5% under biaxial loading has been experimentally investigated using the Arcan apparatus and the universal testing machine (INSTRON 5544). The experimental yield surfaces measured from biaxial experiments are co...

Model for the Deceleration of Secondary Debris Produced by Hypervelocity Impact on Pressure Vessels

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

2012, 26(2): 177-184. doi: 10.11858/gywlxb.2012.02.009

PDF (561)

Abstract:
According to characteristic of secondary debris, initial models of secondary debris are built. The models of secondary debris are classified as three patterns. The first patten is that the projectile is not fragmentated. The second patten is that the projectile is not entirely fragmentated. The thir...

The High Pressure Synthesis and Properties of La0.3Sr0.7CrO3

Lü Yu-Xi, LI Feng-Ying, JIN Chang-Qing

2012, 26(2): 185-188. doi: 10.11858/gywlxb.2012.02.010

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Abstract:
We synthesizedLa0.3Sr0.7CrO3 Mott compound by using high pressure and high temperature sintering method; and studied the crystal structure and magnetic properties. It is shown that La0.3Sr0.7CrO3 adopts a cubic perovskite structure at room temperature. Above 170 K La0.3Sr0.7CrO3 is paramagnetism wit...

Study on Leakage Model of Gas Blowout and Its Numerical Simulation

ZHENG Yuan-Pan, SU Xiao-Ke, LIU Xin-Xin, ZHANG Ya-Li, SUN Ken

2012, 26(2): 189-198. doi: 10.11858/gywlxb.2012.02.011

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Abstract:
Blowout is one of the most serious accidents of gas wells during drilling. To investigate leakage and dispersion of gas blowout and to provide scientific guidance for on-site emergency response, it is necessary to identify what model should be used to describe the leakage source. Leakage source mode...

Research on the Damaging Ability of EFP Warhead at Different Incidence Angle

FAN Fei, LI Wei-Bing, WANG Xiao-Ming, LI Wen-Bin, HAN Yu

2012, 26(2): 199-204. doi: 10.11858/gywlxb.2012.02.012

PDF (735)

Abstract:
Using LS-DYNA simulation software, we studied the relationship of the EFP's damaging ability with the penetration incidence angle of explosively formed projectile (EFP). It was found that, with the incidence angle changing from 0 to 40, the depth of vertical penetration of EFP reduced 34.2%, and the...

Slitting Mechanism and Numerical Simulation Experiments of Complex Ligamented Charge Holders

XIE Hua-Gang, RUAN Huai-Ning, WU Ling-Li

2012, 26(2): 205-210. doi: 10.11858/gywlxb.2012.02.013

PDF (778)

Abstract:
According to the theries of explosion mechanics and rock fracture dynamics mechanics, we found that the slits location shear stress of the complex ligamented charge holders is about 1.59 times of that of the conventional ligamented charge holders. The finite element software ANSYS10.0/LS-DYNA was em...

Experimental Investigation of Door-Explosion with Short-Delay Controlled Blasting in the Counterterrorism

YAN Hong-Hao, WANG Li-He, LI Xiao-Jie, WANG Bin

2012, 26(2): 211-215. doi: 10.11858/gywlxb.2012.02.014

PDF (465)

Abstract:
The counterterrorism personnel commonly use the methods of the concentrated charge and multi-spot explosion to open fast track, rescue the hostage and capture the terrorists. The peak overpressures of the blast wave produced by above two methods are very high, which may easily cause unnecessary dama...

Back Propagation Neural Networks of Base Bleed Propellant Burning Rate under High Pressure Condition

ZHANG Ling-Ke, YU Yong-Gang, LI Zhi-Feng, LIU Dong-Yao

2012, 26(2): 216-220. doi: 10.11858/gywlxb.2012.02.015

PDF (537)

Abstract:
To investigate the combustion characteristics of base bleed propellant moving with the projectile in the gun bore, the closed bomb semi-physical and experimental simulation technology was employed. The combustion property under the condition of simulative high pressure in the gun bore was studied. T...

The Propagation Law of Shock Wave Overpressure in Nuclear Explosion Fusion Power Plant

TAO Jun-Lin, LI Ze-Peng, CHEN Xiao-Wei

2012, 26(2): 221-226. doi: 10.11858/gywlxb.2012.02.016

PDF (578)

Abstract:
The shock wave will be created in the process of generating electricity in the nuclear explosion fusion power plant, whose propagation law of overpressure is an important foundation for the design of cavity wall. However, there is a certain lack of describing the peak overpressure of shock wave in t...

Influence of Steam Explosion on Physical-Chemical Characteristic of Corn Stalk

REN Tian-Bao, XU Gui-Zhuang, MA Xiao-Qin, YU Zheng-Dao, SONG An-Dong, ZHANG Bai-Liang

2012, 26(2): 227-234. doi: 10.11858/gywlxb.2012.02.017

PDF (446)

Abstract:
In the research fields of lignocellulosic materials, the physical-chemical properties are an important foundation for the resource conversion. Employing thermal gravimetric analysis, Fourier transform infrared spectroscopy, X-ray diffraction and scanning electron microscopy methods, physical-chemica...

Effect of High Pressure Processing on Polyphenol Oxidase from Trametes Trogii

CHEN Xiao-Qiang, ZHANG Yin-Jun, ZHANG Shi-Kang, LI Jian-Rong, JIN Jian-Chang, ZHENG Na, YANG Xiu-Fang

2012, 26(2): 235-240. doi: 10.11858/gywlxb.2012.02.018

PDF (738)

Abstract:
The activity of polyphenol oxidase (PPO) produced from Trametes Trogii was determined through using tea polyphenols as substrate. The pH value and the substrate concentration of strongest activity of PPO are 5.0 and 4 mg/mL, respectively. The activity of PPO processed by ultrahigh pressure of 100, 3...

2012 Vol. 26, No. 2

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