高压物理学报

Study on Photoluminescence of Mn2+ in Zn0.83Mn0.17Se and ZnSe/Zn0.84Mn0.16Se Superlattics under Pressures

WANG Wen-Jie, DENG Jia-Jun, Ding Kun

2011, 25(5): 385-389 . doi: 10.11858/gywlxb.2011.05.001

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Abstract:
The photoluminescence of Mn2+ in Zn0.83Mn0.17Se and ZnSe/Zn0.84Mn0.16Se superlattics was investigated at different pressures. The 4T16A1 transition of Mn2+, which shows different pressure dependence in bulk materials and superlattics, was observed. The pressure coefficients obtained from them are -4...

Numerical Simulation of the Gas Gun Experiment with Pillow Impactor Loading

BAI Jing-Song, LUO Guo-Qiang, HUANG Jiao-Feng, LI Ping

2011, 25(5): 390-394 . doi: 10.11858/gywlxb.2011.05.002

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Abstract:
The present study is for verification and validation (VV)of the onedimensional elastic-plastic hydrodynamic code MLEP (Multi-material Lagrangian Elastic-Plastic) and method of the mixing model of different material system. Two gas gun experiments with pillow impactor loading were calculated by MLEP...

A Numerical Simulation of H2-O2-N2 Gaseous Detonation Based on Detailed Chemical Reaction Model

NING Jian-Guo, LI Jian, WANG Cheng, ZHAO Hui

2011, 25(5): 395-400 . doi: 10.11858/gywlxb.2011.05.003

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Abstract:
Numerical simulation has been performed to study the cellular detonation wave in a mixture using a detailed chemical reaction model with 12 species and 23 elementary reactions and a fifth-order weighted essentially non-oscillatory (WENO) scheme with a third-order TVD Runge-Kutta time stepping method...

Experimental Study on Ballistic Resistance Property of 7A04 Aluminum Alloy Against Rod Projectiles Impact

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

2011, 25(5): 401-406 . doi: 10.11858/gywlxb.2011.05.004

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Abstract:
7A04 aluminum alloy with high strength-to-density ratio has been extensively applied for armour material domain. The projectiles normal impacting 7A04 aluminum alloy plates with 10 mm thickness was conduct by light gas gun, where blunt and ogival steel rod projectiles were involved. The damage modes...

Dynamic Compression Properties and Constitutive Model with Strain Rate Effect of Rubber Material

PANG Bao-Jun, YANG Zhen-Qi, WANG Li-Wen, CHI Run-Qiang

2011, 25(5): 407-415 . doi: 10.11858/gywlxb.2011.05.005

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Abstract:
This paper presents experimental study on the quasi-static and dynamic impact response for three kinds of rubbers: carbon black rubber, silicone rubber and foam rubber by using Instron machine and SHPB device. Experimental strain rate covers a wide range from 0.002 s-1 to 15 000 s-1. The strain rate...

High Pressure Sound Velocity Measurement of Material in DAC Using Laser Ultrasonics Technique

MA Yun, ZHANG Yi, LI Jia-Bo, CAI Ling-Cang, LI Jian-Feng, LIU Lei, JING Qiu-Min, WANG Zhi-Gang, WANG Xiang, WENG Ji-Dong, et al.

2011, 25(5): 416-420 . doi: 10.11858/gywlxb.2011.05.006

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Abstract:
A prototype laser-based ultrasound system is designed and built to measure the sound velocity of samples at high pressure in a diamond anvil cell. The system uses a Q-switch laser with 6.3 ns pulse width for excitation of broadband ultrasonic waves, and an optical fiber displacement and velocity mix...

A Combined Technique for Measuring Hugoniot and Interfacial Temperature of Preheating Metals

LI Jun, LI Jia-Bo, ZHOU Xian-Ming, WANG Qing-Song, DAI Cheng-Da

2011, 25(5): 421-428 . doi: 10.11858/gywlxb.2011.05.007

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Abstract:
Research of dynamic respond properties for metal at initial high-temperature condition is very important to develop the universal equation of state. Thus, resistance-wire preheating apparatus over initial temperature range of 300－800 K has been built up by our group in light-gas-gun experiments, and...

Numerical Simulation of Unsteady-State Underexpanded Jet Using Positive Schemes

ZHU Sun-Ke, CHEN Er-Yun, MA Da-Wei, LE Gui-Gao

2011, 25(5): 429-434 . doi: 10.11858/gywlxb.2011.05.008

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Abstract:
A numerical simulation of unsteady-state underexpanded jet was carried out using second order positive schemes, which was developed to solve the axisymmetric Euler equations based on two dimensional conservation laws. Computational results indicate that the method can capture the wave structures of ...

Dynamic Behavior of Titanium Matrix Composites under Hypervelocity Impact

SONG Wei-Dong, LI Jian-Qiao, LIU Hai-Yan

2011, 25(5): 435-443 . doi: 10.11858/gywlxb.2011.05.009

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Abstract:
Based on experimental results, numerical simulations were performed to study the hypervelocity impact of aluminum balls against aluminum targets, verifying the reliability of the numerical model. Hypervelocity impact simulations under three different velocities of 5.52, 7.00 and 8.00 km/s against al...

Dynamic Mechanical Behaviors of Soil under Impact Loads

ZHU Zhi-Wu, NING Jian-Guo, LIU Xu

2011, 25(5): 444-450 . doi: 10.11858/gywlxb.2011.05.010

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Abstract:
The test of the impact characteristic of soil is made on split Hopkinson pressure bar at various strain-rates. The dynamic mechanics properties and the strain-rate effect of soil are discussed. Based on the characteristics of measured dynamic stress-strain curves, as well as preparatory simulation, ...

Numerical Study on the Acceleration of Metallic Flyers Driven by Planar Detonation Wave of Explosives

LUAN Guang-Bo, HAO Li, ZHANG Zhu, 

2011, 25(5): 451-456 . doi: 10.11858/gywlxb.2011.05.011

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Abstract:
As regards the experimental study on the dynamic properties of materials, planar detonation wave driving flyers to impact target is an important technique. The smoothness and limit speed of flyers under detonation load determine the loading effects. The former determines the target size, and the lat...

Relationship between Shock Wave and High-Temperature Flow Produced by Gas Explosion in Coal Mine Roadways

PANG Lei, ZHANG Qi, LI Wei, XIANG Cong, TAN Ru-Mei

2011, 25(5): 457-462 . doi: 10.11858/gywlxb.2011.05.012

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Abstract:
In order to provide theoretical basis for in-depth studies of coal dust explosion after gas explosion in coal mines, the unsteady flow field of gas explosion in roadways was numerically simulated by computational fluid dynamics method. The spatiotemporal relationship between shock wave and high-temp...

Investigation of Explosive Effect to Followed Projectiles by Shaped Charge of Tandem Warhead

KANG Yan-Long, JIANG Jian-Wei, WANG Shu-You, MEN Jian-Bing

2011, 25(5): 463-468 . doi: 10.11858/gywlxb.2011.05.013

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Abstract:
The explosion of shaped charge of tandem warhead and the impact process on followed projectile of impulse are simulated with a numerical hydrocode of AUTODYN. The maximum acceleration response and kinetic energy attenuation of followed projectile during impact process are analyzed under different pr...

Numerical Study of Explosives Initiation by Simultaneous Impact from Two Fragments

JIA Xian-Zhen, CHEN Song, YANG Jian, WANG Jian-Ling

2011, 25(5): 469-474 . doi: 10.11858/gywlxb.2011.05.014

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Abstract:
The explosives initiation by simultaneous impact from two fragments was simulated based on Lee-Tarver ignition and growth model by using finite element code LS-DYNA. In order to verify the simulation method and parameters, the courses that tungsten spheres with different diameters impacted tantalum ...

Effects of High Pressure Processing on the Activity and the Conformation of Horseradish Peroxidase

SHANGGUAN Li-Juan, MA Yong-Kun, CUI Feng-Jie, FAN Xiao-Bo

2011, 25(5): 475-480 . doi: 10.11858/gywlxb.2011.05.015

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Abstract:
High pressure treatment on the activity of peroxidase in fruits and vegetables can affect the sensory quality and shelf life of fruit and vegetable products, and thus it is necessary to study the relationship between the changes of peroxidase activity and its structure under the conditions of high p...

2011 Vol. 25, No. 5

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