高压物理学报

Experimental Study on Shear Response of Alumina Ceramic under Combined Compression and Shear Loading

DUAN Zhuo-Ping, YU Rui, ZHANG Lian-Sheng, HUANG Feng-Lei

2007, 21(4): 337-341 . doi: 10.11858/gywlxb.2007.04.001

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Abstract:
The pressure-shear plate impact experiments have been performed on 95% Al2O3 ceramic using 57 mm diameter compressed gas gun. The high-pressure gases drove the ceramic flyer to impact the oblique target to produce pressure-shear loading, and the particle velocity is traced by embedded electromagneti...

The Sublimation Energy versus Temperature and Pressure and Its Influence on Gasifying Blow-off Impulse

TANG Wen-Hui, XU Zhi-Hong, NIU Jin-Chao, SHE Jin-Hu

2007, 21(4): 342-346 . doi: 10.11858/gywlxb.2007.04.002

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Abstract:
The dependence of the sublimation energy on temperature and pressure was studied based on universal thermodynamics. The result shows that the sublimation energy decreases linearly with the increasing temperature or pressure. The blow-off impulse of aluminum induced by pulsed X-ray was simulated by s...

Investigation on Damage Characteristics of Thin Al-Plates by Oblique Hypervelocity Impact of Al-Sphere

GUAN Gong-Shun, HA Yue, PANG Bao-Jun

2007, 21(4): 347-353 . doi: 10.11858/gywlxb.2007.04.003

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Abstract:
The oblique hypervelocity impacts of space debris on bumper of spacecrafts were studied through 2017 aluminum spheres impacting on thin 2A12 aluminum alloy sheets at different angles. The penetration hole characteristics of single-wall shields and the ricochet characteristics of projectiles were ana...

Numerical Simulation of the Trace of Projectiles Penetrating Concrete

TIAN Zhan-Dong, LI Shou-Cang, DUAN Zhuo-Ping, ZHANG Zhen-Yu

2007, 21(4): 354-358 . doi: 10.11858/gywlxb.2007.04.004

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Abstract:
The continuum damage model which was originally developed to study rock fragmentation was implemented into the transient dynamic explicit finite element code LS-DYNA3D, and then the code is used for the numerical simulation of projectiles' penetrating the concrete. The possible traces of the project...

Effect of Eddy Current Waste on the Output Performance of the Explosive-Driven Ferromagnetic Generators

CHEN Lang, WU Jun-Ying, FENG Chang-Gen

2007, 21(4): 359-366 . doi: 10.11858/gywlxb.2007.04.005

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Abstract:
For increasing the output energy of the explosive-driven ferromagnetic generators, a new structure of ferromagnetic element has been designed to reduce the eddy current waste. The cylinderical Nd2Fe14B rare-earth magnet was cut into four separate parts, and the insulated layers were placed between m...

Pressure Calibration for the Sample Cell of YJ-3000t Multi-Anvil Press at High-Temperature and High-Pressure

SHAN Shuang-Ming, WANG Ri-Ping, GUO Jie, LI He-Ping

2007, 21(4): 367-372 . doi: 10.11858/gywlxb.2007.04.006

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Abstract:
The pressure in the sample cell of YJ-3000t multi-anvil was calibrated in the temperature and anvil surface pressure ranges of 389~1 245 ℃ and 1.00~5.00 GPa by using the high-pressure melting curves of four metals: Cu, Al, Pb and Zn. Through the polynomial fitting of the calibration results for the ...

Numerical Simulation of Particles Impact in Explosive-Driven Compaction Process Using SPH Method

ZHAO Zheng, LI Xiao-Jie, YAN Hong-Hao, Ouyang Xin

2007, 21(4): 373-378 . doi: 10.11858/gywlxb.2007.04.007

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Abstract:
Numerical simulation of large deformation using SPH meshless method has recently become a research hotspot. In this work, we used SPH of LS-DYNA to simulate particles impact in explosive-driven compaction process. Micro-jet flow and void collapse phenomena were mapped, supporting the theory of explo...

Nano-Titanium Dioxide Synthesis Using Gaseous Detonation

Ouyang Xin, YAN Hong-Hao, LIU Jin-Kai, LI Xiao-Jie, QU Yan-Dong, DU Yun-Yan

2007, 21(4): 379-382 . doi: 10.11858/gywlxb.2007.04.008

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Abstract:
TiO2 nanoparticles are prepared by detonation method in gas phase. In this experiment, titanium tetrachloride is used as a precursor, and premixed gas (O2 and H2) as energy. Properties of TiO2 ultrafine particles were studied by means of XRD, SEM and TEM. The results show that the powders which are ...

Motion History Measurement of Projectile Launched by a Two-Stage Light Gas Gun

PENG Qi-Xian, MENG Jian-Hua, LIU Shou-Xian, LIU Jun, CHEN Guang-Hua, MA Ru-Chao, LI Ze-Ren

2007, 21(4): 383-387 . doi: 10.11858/gywlxb.2007.04.009

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Abstract:
The work was done for the research of interior ballistic. A wide range fiber probe (depth of field is 13 m) was designed for measuring the motion history of projectile launched by a 32 mm two-stage light gas gun. The projectile velocity was measured by using a VISAR with velocity per fringe 100 m/s....

A Numerical Analysis for Pressure in Mixed Fuel during Launching

YAN Hua, ZHANG Qi, GUO Yan-Yi, ZHANG Yan-Chun, LUO Yong-Feng, WU Jin-Cai

2007, 21(4): 388-396 . doi: 10.11858/gywlxb.2007.04.010

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Abstract:
The launching safety of explosive charge drastically affecting the application of high explosive should be used with care. The researchers are interested in the low cost and high efficiency of FAE (fuel air explosive) charged warhead. However, few references about the launching safety of the mixed f...

LiF Window Corrections for VISAR

MA Yun, LI Ze-Ren, HU Shao-Lou, LI Jia-Bo, WANG Xiao-Song, CHEN Hong, WENG Ji-Dong, LIU Jun, YU Yu-Ying, SONG Ping, et al.

2007, 21(4): 397-400 . doi: 10.11858/gywlxb.2007.04.011

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Abstract:
Symmetric, plate-impact experiments were performed to measure LiF window correction coefficients for velocity interferometer system for any reflector (VISAR) (at 532 nm). Single crystal LiF window corrections for VISAR under shocked pressure from 2.7 GPa to 66 GPa and the methods of correcting inter...

Study on Synthesizing Diamond from Fe-Ni-C System at High Temperature and High Pressure

LI He-Sheng, LI Mu-Sen

2007, 21(4): 401-408 . doi: 10.11858/gywlxb.2007.04.012

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Abstract:
The synthesizing diamond experiment was carried out with iron-based catalysts made by powder metallurgy using industrial iron and nickel powder as stuff at cubic high pressure apparatus. By employing Raman spectroscopy and X-ray diffraction, it can be proved that the crystal gotten from the experime...

Preparation of Cubic Boron Nitride Polycrystalline Containing Nanodiamond

ZHAO Yu-Cheng, SUN Jin-Feng, WANG Ming-Zhi

2007, 21(4): 409-413 . doi: 10.11858/gywlxb.2007.04.013

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Abstract:
The polycrystalline cBN was prepared at 5.5 GPa and 1 400 ℃ for 500 s. The cBN was coated with titanium by vacuum slow vaporizing technology, and nanodiamond, aluminum and silicon were also used as additives to binding components. By SEM and XRD inspections, the structure and phases of PcBN were ide...

A New Damage Model of Microvoids

DONG Jie, LI Yong-Chi, CHEN Xue-Dong

2007, 21(4): 414-418 . doi: 10.11858/gywlxb.2007.04.014

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Abstract:
With introducing the concept of the number of micro-damage in unit volume, macro damage parameter and microvoids volume are unified together, and a new kind of quadratic micro-voids damage evolution equation is acquired. The effect of inertia is considered during the expansion of voids. The expansio...

Experimental Study on Penetration Resistance of Soil with Low-Velocity Projectile

DONG Yong-Xiang, FENG Shun-Shan, LI Yan-Dong, LI Xue-Lin

2007, 21(4): 419-424 . doi: 10.11858/gywlxb.2007.04.015

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Abstract:
The ballistic characteristics and penetration depth in the different soil media with vertical attitude are obtained by experiments of the low velocity projectile penetrating into hard soil, mid-hard soil and mid-soft soil. Further, the nondimensional equation on penetration depth in different soil m...

Factors Analysis of Debris Cloud's Shape of Hypervelocity Impact

TANG Mi, BAI Jing-Song, LI Ping, ZHANG Zhan-Ji

2007, 21(4): 425-432 . doi: 10.11858/gywlxb.2007.04.016

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Abstract:
The numerical simulations of hypervelocity impact of Al-spheres on bumper at normal are carried out using the smoothed particle hydrodynamics (SPH) technique. The simulation results are compared with experimental results, and the simulated hole diameters of bumper and debris cloud are well consisten...

Phase Transformation Mechanism of Single Crystal Iron from MD Simulation

CUI Xin-Lin, ZHU Wen-Jun, HE Hong-Liang, DENG Xiao-Liang, LI Ying-Jun

2007, 21(4): 433-438 . doi: 10.11858/gywlxb.2007.04.017

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Abstract:
Shock-induced phase transformation (body-centered cubic phase to hexagonal close-packed phase) in single crystal iron has been investigated by means of molecular dynamics (MD) simulations using an embedded atom method (EAM) potential. The simulated dimension is 28.7 nm22.9 nm22.9 nm in size with 1.2...

Effect of the Preheated Flyer on Hugoniot Measurements

WANG Qing-Song, LAN Qiang, DAI Cheng-Da

2007, 21(4): 439-443 . doi: 10.11858/gywlxb.2007.04.018

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Abstract:
A theoretical method was proposed to evaluate the Hugoniot parameters of the preheated metals based on Grneisen equation of state. This method offsets some disadvantages of BACT and can be used to estimate Hugoniot parameters of all kinds of solids with preheating in principle. This method was appli...

Several Internal Heating Modes and Temperature Measurement in Bridgman Anvil

LIU Xiu-Ru, Lü Shi-Jie, SU Lei, SHAO Chun-Guang, HU Yun, HUANG Dai-Hui, HONG Shi-Ming

2007, 21(4): 444-448 . doi: 10.11858/gywlxb.2007.04.019

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Abstract:
Four internal heating modes in Bridgman anvil were designed in this work. Heater was made of tantalum and graphite flakes. Two thermocouples were used to measure the temperature change of the central and upside section in sample cavity with input voltage. Temperature gradients were roughly discussed...

2007 Vol. 21, No. 4

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