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

2011 Vol. 25, No. 1

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An Experimental Study on the Micro/Macro Fracture Behavior of PBX Using Digital Speckle Correlation Method
ZHOU Zhong-Bin, CHEN Peng-Wan, HUANG Feng-Lei
2011, 25(1): 1-7 . doi: 10.11858/gywlxb.2011.01.001
PDF (534)
Abstract:
The micro/macro fracture behavior of a polymer bonded explosive (PBX) material was experimentally studied using a semi-circular bend test and digital speckle correlation method (DSCM). Brittle fracture occurred when a semi-circular disc sample of PBX with a preset crack was compressed. The whole str...
Mesoscale Simulation of Cavity Collapse Hot Spot Mechanism in HMX under Shock Loading
FU Hua, ZHAO Feng, TAN Duo-Wang, WANG Wen-Qiang, SHANG Hai-Lin
2011, 25(1): 8-14 . doi: 10.11858/gywlxb.2011.01.002
PDF (487)
Abstract:
The origin, ignition, growth of hot spot are the factors to understand shock initiation in heterogeneous explosive. The process of cavity collapse in HMX under shock loading was simulated using discrete element method. The results showed that the visco-plastic deformation formed hot spot mechanism a...
The Failure Strength Parameters of HJC and RHT Concrete Constitutive Models
ZHANG Ruo-Qi, DING Yu-Qing, TANG Wen-Hui, RAN Xian-Wen
2011, 25(1): 15-22 . doi: 10.11858/gywlxb.2011.01.003
PDF (1508)
Abstract:
The analyzed and calculated results indicate that the concrete failure strength will decrease under higher hydrostatic pressure, when the original failure parameters of HJC and RHT models implemented in LS-DYNA and AUTODYN are adopted. A new method is introduced which using the characteristic streng...
Numerical Study on the Viscosity of Shocked Al vis Small-Perturbation Amplitude Damping Profile Measurement by Flyer Impact
MA Xiao-Juan, LIU Fu-Sheng, LI Yi-Lei, YU Ming, LI Yong-Hong, PENG Xiao-Juan, JING Fu-Qian
2011, 25(1): 23-28 . doi: 10.11858/gywlxb.2011.01.004
PDF (546)
Abstract:
Flyer-impact disturbance amplitude damping method of shock wave is one of practical method for viscosity measurement at high pressure and high temperature. The experimental results for shocked Al at two high pressures have been reported previously by Li, et al, instead of the analytical solution met...
Experimental Study on Shock Wave Demagnetization of Nd2Fe14B Hard Ferromagnetic
WU Jun-Ying, CHEN Lang, LI Wei, FENG Chang-Gen
2011, 25(1): 29-35 . doi: 10.11858/gywlxb.2011.01.005
PDF (637)
Abstract:
For the study of the demagnetization performance of Nd2Fe14B ferromagnetic under shock wave loading, the plane shock wave loading experiment device was established, and the shock demagnetization experiments were conducted. The electromotive forces were measured, and the shock demagnetization time an...
Primary Experimental Study on Driving Technique of Strong Detonation Using Gas Gun
WEN Shang-Gang, ZHAO Feng, WANG Jian, ZHAO Yu-Gang, WENG Ji-Dong, WANG Xiang
2011, 25(1): 36-40 . doi: 10.11858/gywlxb.2011.01.006
PDF (628)
Abstract:
Using the loading technique of two-stage gas gun and the doppler pin system, the driving technique of strong detonation is studied. The velocity increment of the secondary flyer is obtained when the velocities of the first flyer surpass 5 km/s. The loading technique of two-stage gas gun and the driv...
The Numerical Simulation of 2-D Thermal Shock Wave Induced by X-Ray in Anisotropic Material
HUANG Xia, TANG Wen-Hui, JIANG Bang-Hai, GUO Xian
2011, 25(1): 41-47 . doi: 10.11858/gywlxb.2011.01.007
PDF (486)
Abstract:
Using anisotropic elasto-plastic constitutive model, the 2-D thermal shock wave induced by X-ray in anisotropic material is simulated by finite element method, and the thermal shock wave propagation rules are discussed. The results show that the thermal shock wave exhibits different shapes under the...
Quasi-Static Bursting Analysis of Gas-Filled Pressure Vessels on the Front Side under Hypervelocity Impact
GAI Fang-Fang, PANG Bao-Jun, GUAN Gong-Shun
2011, 25(1): 48-54 . doi: 10.11858/gywlxb.2011.01.008
PDF (575)
Abstract:
In a given set of impact velocity conditions, the numerical simulation is performed to analyze the effect of the projectile diameter on perforation of the front wall of gas-filled pressure vessels. Then the critical stress value is estimated based on the stress intensity factor which is determined b...
Fabrication of Nanocrystalline BaTiO3 Ceramics by Ultra-High Pressure Sintering
XIAO Chang-Jiang, JIN Chang-Qing, LI Zheng-Xin, DENG Xiang-Rong
2011, 25(1): 55-60 . doi: 10.11858/gywlxb.2011.01.009
PDF (612)
Abstract:
10 nm raw BaTiO3 powder was sintered by ultra-high pressure assisted method at 6 GPa. The grain size of sintering samples is about 30 nm. The microstructures of sintering samples were studied by scanning electron microscope and atomic force microscopy. The results indicated that owing to the ultra-h...
First-Principle Study on the Structural, Elastic Properties and Absorption Spectra on ZnO under High Pressure
WANG Qing-Bo, ZHENG Guang, HE Kai-Hua, CHEN Qi-Li, YU Li, LONG Guang-Zhi, ZENG Zhong-Liang
2011, 25(1): 61-67 . doi: 10.11858/gywlxb.2011.01.010
PDF (666)
Abstract:
The structural, elastic properties and absorption spectra of ZnO in wurtzite (B4), NaCl (B1) and CsCl (B2) structures are studied by plane wave pseudo-potential (PWP) method. The method is based on the density functional theory (DFT) within the local-density approximation (LDA) and generalized gradi...
Study on the Influence of the Outer Shell Thickness on the SEFAE Damage-Power
GAO Hong-Quan, LU Fang-Yun, LUO Yong-Feng, WANG Shao-Long, HU Jian, YUAN Wei, QIN Zhi-Qiang
2011, 25(1): 68-72 . doi: 10.11858/gywlxb.2011.01.011
PDF (627)
Abstract:
Based on the theoretical analysis of the SEFAE outer shell velocity and kinetic energy with different depths, the influence of the shell on the dispersed fuel was obtained. The relationships between the damage power and the thickness of the shells were obtained by different SEFAE explosion experimen...
Numerical Simulation on Initial Stage of Liquid Dispersed under Explosion Drive
XU Yu-Xin, WANG Shu-Shan, HAN Bao-Cheng, LIU Yong
2011, 25(1): 73-78 . doi: 10.11858/gywlxb.2011.01.012
PDF (722)
Abstract:
For fuze-warhead cooperation design on fire extinguishing warhead, characteristics on liquid (based-water extinguisher) dispersed under explosion drive were studied. The numerical simulation model was built based on representative fire extinguishing warhead structure. The numerical simulation was do...
Breeding of Bacterial Cellulose Strain Induced by Ultra-High Pressure and Optimization of Fermentation Medium
DU Shuang-Kui, LI Zhi-Xi, WU Rui-Qin, YANG Jia-Ping
2011, 25(1): 79-88 . doi: 10.11858/gywlxb.2011.01.013
PDF (605)
Abstract:
In order to obtain high-yield strains of bacterial cellulose (BC), the primary bacterial cellulose strain was induced by ultra-high pressure. Plackett-Burman design was employed to evaluate variables which were relevant to yield of BC which was produced by strain induced by ultra-high pressure. Ferm...
Effects of Combined High Pressure and Thermal Treatment on Protease Activities in Beef Muscle
MA Han-Jun, ZHOU Guang-Hong, YU Xiao-Ling, GAO Hai-Yan, PAN Run-Shu, D. A. Ledward
2011, 25(1): 89-96 . doi: 10.11858/gywlxb.2011.01.014
PDF (535)
Abstract:
The effects of combined high pressure (0.1～600 MPa) and temperature (20～60 ℃) treatment for 20 min on beef protease activities were studied. The results showed that the protease activities decreased with increasing pressure up to 400 MPa at room temperature, after which there was no significant chan...

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