高压物理学报

Numerical Simulation of Craters Produced by Projectile Hypervelocity Impact on Aluminum Targets

ZHANG Wei, MA Wen-Lai, MA Zhi-Tao, PANG Bao-Jun

2006, 20(1): 1-5 . doi: 10.11858/gywlxb.2006.01.001

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Abstract:
All spacecrafts in low orbit are subject to hypervelocity impacts by meteoroids and space debris. These impacts can damage spacecraft flight-critical systems, which can in turn lead to catastrophic failure of the spacecraft. In order to ensure the astronauts safety and spacecraft normal operation, t...

Fluorescence of Rhodamine 101 under High Pressures

ZHAO Zhi, DING Ze-Jun, WANG Zhong-Ping, TANG Xu-Dong, ZHANG Zeng-Ming

2006, 20(1): 6-10 . doi: 10.11858/gywlxb.2006.01.002

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Abstract:
The fluorescence spectra of both Rhodamine 101 powder and solution (mixture of methanol, ethanol and water as solvent) have been measured under high pressures. It has been found that the emission character of Rhodamine 101 powder is quite different from that in solvent under high pressures. For Rhod...

Synchrotron Radiation Diffraction of Enstatite under High Temperature and High Pressure

MA Yan-Mei, ZHOU Qiang, YANG Kai-Feng, LI Xue-Fei, SHEN Long-Hai, CUI Qi-Liang, LIU Jing, ZOU Guang-Tian

2006, 20(1): 11-14 . doi: 10.11858/gywlxb.2006.01.003

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Abstract:
In-situ energy dispersive X-ray diffraction measurements of enstatite have been studied by using diamond anvil cell (DAC) with synchrotron radiation and laser heating in the range of 0~23 GPa and 293~2 000 K. We have found that enstatite transform to wadsleyite phase at 15.3 GPa and 1 600 K. At temp...

Ab initio Calculation of the Effective Inter-Atomic Pair Potential in Liquid Helium

TIAN Chun-Ling, LIU Fu-Sheng, CAI Ling-Cang, JING Fu-Qian

2006, 20(1): 15-19 . doi: 10.11858/gywlxb.2006.01.004

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Abstract:
Ab initio Hartree-Fock self-consistent-field (SCF) technique and the atomic cluster method have been applied to study the effective inter-atomic pair potential in liquid helium. The atomic cluster (He)9 with BCC geometry (only taking the first neighbors into account) is used to stimulate the average...

A New Carbon Nitride Phase Synthesized by Shock Compression

LIU Jian-Jun, SEKINE T, KOBAYASHI T

2006, 20(1): 20-24 . doi: 10.11858/gywlxb.2006.01.005

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Abstract:
To synthesize a carbon nitride with high density existing by theoretical prediction, a series of shock recovery experiments up to 50 GPa were carried out on two nitrogen-rich materials of a C-N-O amorphous precursor and dicyandiamide. The powder X-ray diffractions (XRD) of recovered samples show tha...

Research on the Raman Spectra of Gypsum at Pressure of 100~800 MPa and Room Temperature

YANG Yu-Ping, ZHENG Hai-Fei

2006, 20(1): 25-28 . doi: 10.11858/gywlxb.2006.01.006

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Abstract:
This paper measures the Raman peak displacements of the four vibration modes of SO bonding and the hydroxyl-stretching vibration modes in the gypsum at high pressures using diamond anvil cell. The experimental results show that at the temperature of 25 ℃ and the pressure of 100～800 MPa the Raman pea...

Discussion on the Mechanism of cBN Synthesized by Benzene Thermal Method Using (C2H5)2OBF3 and Li3N as Reactants

WANG Shao-Bo, XU Xiao-Wei, FAN Hui-Li, ZHENG Yan-Jun, LI Yu-Ping

2006, 20(1): 29-33 . doi: 10.11858/gywlxb.2006.01.007

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Abstract:
BN is synthesized by benzene thermal method using (C2H5)2OBF3 and Li3N as reactants and its phase transition mechanism is studied. Not only hBN and cBN are found in the products testified by XRD and FTIR, but also oBN, atmosphere form Li3BN2(O) and high pressure form Li3BN2(T) are discovered. The di...

Spall Fracture Properties of AF1410 Steel

GUI Yu-Lin, LIU Cang-Li, WANG Yan-Ping, SUN Cheng-Wei

2006, 20(1): 34-38 . doi: 10.11858/gywlxb.2006.01.008

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Abstract:
The spall properties of AF1410 steel are studied with the loading by gas gun. The Hugoniot relationship, plastic strain rate, spall strength, spall thickness and other dynamic parameters are obtained from experimental measurement. By the fracture analysis and metallographic analysis, the spall fract...

2D Numerical Simulation of Explosive Damage Effect on Obstacles in Water

HAO Li, NING Jian-Guo, WANG Cheng

2006, 20(1): 39-44 . doi: 10.11858/gywlxb.2006.01.009

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Abstract:
The physical and computational models of explosive damage effect of obstacles in water are proposed. The conservation equations, the dynamic elastic-plastic constitutive relation and damaging criterion of concrete are established, together with the yielding criterion subjected to large strains, high...

Numerical Simulation of Temperature Effects on Warhead Explosion Products

LUO Ai-Min, ZHANG Qi

2006, 20(1): 45-50 . doi: 10.11858/gywlxb.2006.01.010

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Abstract:
Relation between mass density of explosive detonation products and time is studied under three kinds of confinement conditions, i. e., no confinement, weak confinement, and rigid confinement by coupling of BKW code, JWL code and LS-DYNA program, respectively. Associated with HOM equation of state, e...

An Isothermal Three-Parameter Equation of State Applied to Alkali Halide Crystals under High Pressures

YAN Zu-Tong

2006, 20(1): 51-55 . doi: 10.11858/gywlxb.2006.01.011

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Abstract:
From the definition of isothermal bulk modulus and an assumption of its relationship with the pressure, an isothermal three-parameter equation of state has been proposed, which is found to be applicable at high pressure. The proposed equation of state has been used to compute the pressure-volume beh...

Study of Optical Properties and Electronic Structure of V in ZnS by First Principles

HE Kai-Hua, YU Fei, JI Guang-Fu, YAN Qi-Li, ZHENG Shu-Kui

2006, 20(1): 56-60 . doi: 10.11858/gywlxb.2006.01.012

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Abstract:
The optical properties and electrical structure of V in ZnS supercell have been computed by means of plane wave pseudo-potential method (PWP) with generalized gradient approximation (GGA). The calculated optical property is in consist with the values calculated by the theory of crystal field and wit...

Numerical Calculation of Ferroelectric Power Supply Initiating Metal Bridge Foil

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

2006, 20(1): 61-66 . doi: 10.11858/gywlxb.2006.01.013

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Abstract:
To investigate the effect of ferroelectric power supply initiating metal bridge foil, the electrical responses of the shock-loaded PZT95/5 ferroelectric with copper bridge foil load were numerically calculated. The non-linear resistance model was used for the metal bridge foil. The voltage, current,...

Dynamic Cylindrical Cavity Expansion Model and Its Application to Penetration Problems

Zhou Hui, Wen He-Ming

2006, 20(1): 67-78 . doi: 10.11858/gywlxb.2006.01.014

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Abstract:
Dynamic cylindrical cavity expansion model and its application to penetration problems were studied. Both incompressible and compressible bilinear strain-hardening material models were considered. First, solutions for dynamic cylindrical cavity expansion (DCCE) are obtained in terms of the velocity ...

Image Excursion Analysis of Two Rotating Mirror High-Speed Cameras Used Simultaneously

LIU Ning-Wen, SANG Yong-Sheng, XIAO Zheng-Fei, CHANG Li-Hua, SHANG Chang-Shui

2006, 20(1): 79-82 . doi: 10.11858/gywlxb.2006.01.015

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Abstract:
Reasons of imaging excursion of two rotating mirror high speed cameras used simultaneously are discussed, and the influence to images are analysed according to the theories and experiments, such as the signal drift of the magnetoelectric sensor and improperly operating etc. Finally some measurement ...

Effect of Ultra-High Pressure Processing (UHPP) on the Microstructure of Bacillus subtilis

ZENG Qing-Mei, XIE Hui-Ming, PAN Jian, YANG Yi, XU Hui-Qun, HUANG Xun-Duan, ZHAO Yang-Nan

2006, 20(1): 83-87 . doi: 10.11858/gywlxb.2006.01.016

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Abstract:
The effect of ultra-high pressure processing on the microstructure of Bacillus subtilis AS 1.140 was investigated, and the inactivation mechanism of its vegetative form and spore was studied. The change of B. subtilis microstructures were analyzed and compared in terms of the oberation with a Transm...

Experimental Study of the Compressible Behavior of Low-Density Polyurethane Foam

LIN Yu-Liang, LU Fang-Yun, WANG Xiao-Yan, ZHAO Xi-Jin

2006, 20(1): 88-92 . doi: 10.11858/gywlxb.2006.01.017

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Abstract:
The compressive stress-strain behaviors of polyurethane foams in four different mass densities have been tested by SHPB at strain rates of 1103～5103 s-1. Experimental results show that the compressive behavior of the polyurethane foam is sensitive to the strain rates between quasi-static experiments...

Application of Interparticle Contact Algorithm Based on Riemann Solution in SPH

XU Zhi-Hong, TANG Wen-Hui, ZHANG Ruo-Qi

2006, 20(1): 93-96 . doi: 10.11858/gywlxb.2006.01.018

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Abstract:
Smooth particle hydrodynamics (SPH) is a new effective numerical method for modeling problems involving large deformation. However when the SPH method is used to simulate shock waves come across contact interface, tensile instability occurs at the contact interface. In this paper we use contact algo...

Principle Experiments Research of Technique for Quasi-Isentropic Magnetically Driven Flyer Plates

ZHANG Zhao-Hui, LIU Cang-Li, YANG Li-Bing, GU Yuan-Chao, ZOU Jie, HUANG Xian-Bin, OUYANG Kai, LI Jun, LIU Qiao, DENG Xiang-Yang

2006, 20(1): 97-101 . doi: 10.11858/gywlxb.2006.01.019

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Abstract:
Experiments were performed to investigate the quasi-isentropic magnetically driven flyer plates with several sizes on FP-1, and their velocity histories were recorded by VISAR. When the maximum current was 3 MA, the maximum velocity of flyer plate was 797.3 m/s. Through this work, we get the princip...

Behaviors of Shock Initiation and after-Initiation for Heterogeneous Explosives

LI Yin-Cheng

2006, 20(1): 102-108 . doi: 10.11858/gywlxb.2006.01.020

PDF (831)

Abstract:
Campbell's and other authors' experimental studies of behaviors of initiation and after-initiation for heterogeneous explosives were introduced and analyzed, but initiation conditions were not dealt with. When an intense shock wave enters a heterogeneous explosive charge, detonation is initiated by ...

Numerical Simulation of Fragment Impacting on Charge with Aluminum Shell

CHEN Hai-Li, JIANG Jian-Wei, MEN Jian-Bing

2006, 20(1): 109-112 . doi: 10.11858/gywlxb.2006.01.021

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Abstract:
Numerical simulation for the initiation or ignition of explosive with aluminum shell was carried out following the Lee-Tarver initiation model of the Autodyn-2D code when it was impacted respectively by sphere or column form fragment. The influence on charge detonation of the shape and velocity of f...

2006 Vol. 20, No. 1

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