Notice on the organization of advanced research class on high-pressure science and new materials of engineering knowledge of professional and technical personnel Notice on the organization of advanced research class on high-pressure science and new materials of engineering knowledge of professional and technical personnel

2010 Vol. 24, No. 1

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The Criterion for Crack of Tungsten Carbide Anvil Based on Finite Element Method
HAN Qi-Gang, MA Hong-An, LI Rui, ZHANG Cong, LI Zhan-Chang, JIA Xiao-Peng
2010, 24(1): 1-5 . doi: 10.11858/gywlxb.2010.01.001
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Abstract:
Based on finite element method, the model of tungsten carbide (WC) anvil and the criterion for crack of WC anvil used in China-type cubic high pressure apparatus have been founded successfully. The simulation results indicated that the criterion for crack of WC anvil should make the reference point ...
Morphology Investigation of the Extended-Chain Crystals in High-Pressure Crystallized Poly (Ethylene Terephthalate)-(Bisphenol-A) Polycarbonate Blends
Lü Jun, HUANG Rui, LI Liang-Bin
2010, 24(1): 6-14 . doi: 10.11858/gywlxb.2010.01.002
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Abstract:
Morphologies of extended- chain crystals with different characteristics, i.e. wedge-shaped crystals, bent crystals and wedge- shaped bent crystals, were disclosed with scanning electron microscopy (SEM) and atomic force microscope (AFM) in the high-pressure crystallized poly (ethylene terephthalate)...
Numerical Simulation of Suspended RDX Dust Detonation in a Shock Tube
HONG Tao, LIN Wen-Zhou, QIN Cheng-Sen
2010, 24(1): 15-20 . doi: 10.11858/gywlxb.2010.01.003
PDF (795)
Abstract:
Dust detonation of RDX particles suspended in air was numerically studied with two-phase flow model. Behind the leading shock front of detonation, RDX particles were accelerated and heated by the gas flow. Melt of RDX occurred on the surface of particles. It was assumed that melted part of particle ...
Study on Numerical Methods for Particle Material Penetration Problems
LIU Xiao-Hu, ZHU Tao
2010, 24(1): 21-25 . doi: 10.11858/gywlxb.2010.01.004
PDF (537)
Abstract:
Four numerical methods, i.e., purely Continuum based Finite Element Method (C-FEM), Discrete Element Method (DEM), Discrete particle based Finite Element Method (D-FEM) and combination of FEM and DEM (FEM-DEM), were explored through numerical examples of steel sphere normally impacting on the sand t...
The Parallel Computation Based on MPI for Explosion in Air
FEI Guang-Lei, MA Tian-Bao, NING Jian-Guo
2010, 24(1): 26-30 . doi: 10.11858/gywlxb.2010.01.005
PDF (778)
Abstract:
Euler algorithm, fuzzy interface method for three-dimensional multi-material and the data dependence of this algorithm were studied, and a method for settling the data dependence was presented. The parallel program of MMIC-3D based on message passing interface (MPI) was designed. The three-dimension...
Optical Observation and Numerical Simulation on the Evolution of Adiabatic Shear Band in Structural Steel
CHEN Si-Ying, HUANG Chen-Guang, KONG Wei-Guo, NI Guo-Qiang
2010, 24(1): 31-36 . doi: 10.11858/gywlxb.2010.01.006
PDF (442)
Abstract:
Adiabatic shear band (ASB) may cause damages and failures of many metal materials under impact loading, which is a key issue in the research of damage mechanism. The theoretical study is mainly focused on the relationship among the strain, stress, speed of shear and the initial flaw size in one-dime...
High Temperature SHPB System with Heat Insulation for Short Ceramic Bars
XIAO Da-Wu, LI Ying-Lei, HU Shi-Sheng
2010, 24(1): 37-42 . doi: 10.11858/gywlxb.2010.01.007
PDF (711)
Abstract:
To obtain dynamic behavior of materials at very high temperature, a new experimental system of high temperature split Hopkinson pressure bar (SHPB) is investigated. The steel bars in the inside section of the furnace are replaced with relatively close acoustic impedance matched short ceramic bars. C...
Finite Element Analysis on the Influence of PMMA Geometry on Explosion Cutting
WANG Zhi-Hua, LI Zhi-Qiang, REN Hui-Lan, ZHAO Long-Mao
2010, 24(1): 43-48 . doi: 10.11858/gywlxb.2010.01.008
PDF (644)
Abstract:
In order to improve the present aviation ejection lifesaving system and enhance success possibility of safe escape, the application of Miniature Detonating Cord (MDC) on the aviation ejection-escape- system is proposed. The explosion cutting process of plexiglass (PMMA) plate and Canopy by MDC is si...
Experimental Research on Compression Mechanical Properties of Ta-10W
ZHONG Wei-Zhou, SONG Shun-Cheng, XIE Ruo-Ze, HUANG Xi-Cheng
2010, 24(1): 49-54 . doi: 10.11858/gywlxb.2010.01.009
PDF (1029)
Abstract:
Quasi-static and dynamic compression experiments of unannealed Ta-10W alloy specimen are implemented by MTS and split Hopkinson pressure bar equipments. Quasi-static compression yield strength is gained. In addition, the stress-strain history and dynamic compression yield strength are obtained when ...
Further Study on JWL Equation of State of Detonation Product for Insensitive High Explosive
SUN Zhan-Feng, XU Hui, LI Qing-Zhong, ZHANG Chong-Yu
2010, 24(1): 55-60 . doi: 10.11858/gywlxb.2010.01.010
PDF (892)
Abstract:
The JWL equation of state of detonation product for insensitive high explosive JB-9014 was further studied. The particle velocity, displacement, and acceleration of the cylinder wall were obtained from the modified standard cylinder test. The parameters of JWL equation of state were derived from ana...
Numerical Analysis on Fragmentation Properties of the Steel Cylinder Subjected to Detonation of Internal Short Cylinderical Explosive Charge
WANG Xin-Zheng, ZHANG Song-Lin, ZOU Guang-Ping
2010, 24(1): 61-66 . doi: 10.11858/gywlxb.2010.01.011
PDF (753)
Abstract:
The characteristics of fragments, which are numerical studied with Smoothed Particle Hydrodynamic (SPH) algorithms, come from the steel cylinder subjected to the detonation of internal short cylinderical explosive charge. Grady spall model is employed to describe the spall failure of the steel cylin...
Study on the Pressure-Induced Phase Transition of g-C3N4
LI Xue-Fei, MA Yan-Mei, SHEN Long-Hai, ZHANG Jian, LEI Wei-Wei, LIU Wei, ZOU Guang-Tian
2010, 24(1): 67-70 . doi: 10.11858/gywlxb.2010.01.012
PDF (1047)
Abstract:
Graphitic carbon nitride (g-C3N4) is prepared by pyrolysis of melamine. At room temperature, the structure change of the g-C3N4 is investigdted by in situ high pressure angle-dispersive X-ray diffraction with a synchrotron radiation source, which is in a diamond-anvil cell. The results show that str...
Study on Thermal Stability of Ti2AlN-Al at High Pressure
AN Pei, KOU Zi-Li, LI Zi-Yang, QIN Jia-Qian
2010, 24(1): 71-75 . doi: 10.11858/gywlxb.2010.01.013
PDF (797)
Abstract:
Thermal stability of Ti2AlN-Al at high pressure is studied. Based on X-ray diffraction (XRD) and scanning electron microscopy (SEM), it was found that the thermal stability was mainly dependent on the temperature, but less on the pressure. When the pressure is 3, 4 and 5 GPa, the lowest reaction tem...
Experiment Research on the Hugoniot of JB-9014 Explosive Over-Driven Detonation Product
ZENG Dai-Peng, CHEN Jun, TAN Duo-Wang
2010, 24(1): 76-80 . doi: 10.11858/gywlxb.2010.01.014
PDF (761)
Abstract:
Over-driven detonation is achieved by high speed flyer impacting, which is driven by explosive. The time when the shock wave passes through the samples is detected. Using the impedance matching method, the Hugoniot of the product of the JB-9014 explosive can be obtained. It is shown that the simple ...

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