高压物理学报

Planar Explosion Shock Wave Attenuation in Granular Metal

CHEN Ya-Hong, BAI Chun-Hua, WANG Zhong-Qi, LI Jian-Ping

2011, 25(6): 481-486. doi: 10.11858/gywlxb.2011.06.001

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Abstract:
The loading and unloading paths of shock impact on granular metal were analyzed, and the attenuation of planar explosion shock wave in granular metal was investigated using characteristic method. The results showed that the initial peak pressure of the shock wave was determined by the type and prope...

Characteristics Analysis of Free-Surface Velocity Profiles of Ultra-Pure Aluminum

QI Mei-Lan, LUO Chao, FAN Duan, HE Hong-Liang

2011, 25(6): 487-492. doi: 10.11858/gywlxb.2011.06.002

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Abstract:
A series of plate impact experiments were conducted to probe into the free-surface velocity profiles characteristics of ultra-pure aluminum (Purity:99.999%) by a velocity interferometer system for any reflector (VISAR). Based on the observed differences of pullback signals in amplitude, pulse width,...

An Elastic/Viscoplastic Pore Collapse Model of Double-Layered Hollow Sphere for Hot-Spot Ignition in Shocked Explosives

WEN Li-Jing, DUAN Zhuo-Ping, ZHANG Zhen-Yu, OU Zhuo-Cheng, HUANG Feng-Lei

2011, 25(6): 493-500. doi: 10.11858/gywlxb.2011.06.003

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Abstract:
An elastic/viscoplastic pore collapse model of double-layered hollow sphere, in which the effect of the binder in Plastic Bonded Explosives (PBX) was taken into account, was developed as a hot-spot ignition model in shocked explosives. The space and time distributions of the velocity, strain, temper...

Study on the Grain-Size Distribution Rule and Influence Factors of Nanocrystalline Copper Fabricated under Explosive Loading

WANG Jin-Xiang, ZHOU Nan, WANG Xiao-Xu, HANG Yi-Fu

2011, 25(6): 501-507. doi: 10.11858/gywlxb.2011.06.004

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Abstract:
Nanocrystalline copper was fabricated by severe plastic deformation of coarse-grained copper at high strain rate under explosive loading. The average grain size of the samples was tested by X-ray diffraction analysis, and the deformation process was simulated recur to LS-DYNA3D finite element progra...

Study on Parallel Algorithm of Eulerian Method for Three-Dimensional Multi-Material Plastic-Elastic Hydrokinetics

MA Tian-Bao, FEI Guang-Lei, ZHANG Wen-Yao

2011, 25(6): 508-513. doi: 10.11858/gywlxb.2011.06.005

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Abstract:
Parallel computing of 3D explosion and shock processes on the parallel computer is effective means for the large-scale numerical study of explosion and shock process. Considering the complexity of the parallel programming, the overall strategy for parallel programming of 3D mutil-material hydro-elas...

Study on the Development Mechanism of Detonation Wave for the Hydrogen-Oxygen Mixture in a Shock Tube

WANG Jian, DUAN Ji-Yuan, ZHAO Ji-Bo, WEN Shang-Gang, TAN Duo-Wang

2011, 25(6): 514-518. doi: 10.11858/gywlxb.2011.06.006

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Abstract:
This paper mainly focuses on the experimental investigation of the gaseous detonation wave build-up mechanism for hydrogen-oxygen mixture in shock tube. Five pressure sensors were used to record the pressures and a high-speed camera was used to capture velocities of flame, shock, or detonation wave....

First-Principles Study of Al, N Codoped p-Type ZnS

LI Sheng-Zhi, LIU Jin-Chao, YANG Xiang-Dong, JIANG De-Qiong

2011, 25(6): 519-525. doi: 10.11858/gywlxb.2011.06.007

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Abstract:
The electronic structures of pure ZnS, N-doped and Al-N codoped zinc-blende ZnS were calculated by using first-principles ultrasoft pseudo-potential approach of the planar wave based upon the density functional theory, and the band structure, density of states and Mulliken charge population were stu...

Failure Characteristics of Alumina Penetrated by Shaped Charge Jet

REN Hui-Lan, GUO Ting-Ting, NING Jian-Guo

2011, 25(6): 526-532. doi: 10.11858/gywlxb.2011.06.008

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Abstract:
A theory model to calculate the target resistance is established to evaluate the ballistic properties; the parameters used in the numerical simulations were determined by simulating the experiment of long rod penetration into alumina ceramic target; the theoretical model is proved to be reasonable b...

Experiments and Numerical Simulations of Concrete Dynamic Mechanical Properties

ZHANG Zhu, ZHAO Hui, YU Hui

2011, 25(6): 533-538. doi: 10.11858/gywlxb.2011.06.009

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Abstract:
A light gas gun was used to conduct the dynamic mechanical properties experiments of plain concrete material under three different impact velocities, getting the time-stress curves. Then, numerical calculations were used to simulate concrete's light gas gun experiments, comparing the simulation resu...

Study on Big Entry Hole Bidirectional Shaped Charge

LI Lei, SHEN Zhao-Wu, MA Hong-Hao

2011, 25(6): 539-548. doi: 10.11858/gywlxb.2011.06.010

PDF (642)

Abstract:
A shaped charge model, in which the biconical liner with the two-way charging structure was combined, was designed. Its jet formation mechanism was studied by means of numerical simulations, and the jet parameters were calculated. The obtained results were shown as follows: First, the small cone ang...

2-D GEL Coupling Method and Its Numerical Simulation on Vessel to Explosion Impact Load

LI Lei, BAI Jin-Song, LIU Kun, LI Ping

2011, 25(6): 549-556. doi: 10.11858/gywlxb.2011.06.011

PDF (533)

Abstract:
MF PPM (Piecewise-Parabolic Method) code based on Euler method and DEFEL (2-D Finite Elements Code) code based on Lagrange method were coupled according to the pressure and normal velocity consecutive rule. GEL (Ghost-fluid Euler-Lagrange) method was developed. This method has the advantage of perfo...

A Novel Design of a Hypervelocity Launcher Based on Two-Stage Gas Gun Facilities

ZHAO Shi-Cao, SONG Zhen-Fei, JI Guang-Fu, GONG Zi-Zheng, ZHAO Xiao-Ping

2011, 25(6): 557-564. doi: 10.11858/gywlxb.2011.06.012

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Abstract:
A new scheme of hypervelocity launcher was put forward in this paper by means of strong detonation. An explosive ring was fixed internally in a specially designed third-stage barrel in which the projectile launched by two-stage gas gun at velocity ranging from 6 to 7 km/s was able to be accelerated ...

Study on Characteristics of Partial Penetration of Projectile into Steel Panel

DONG Yong-Xiang, FENG Shun-Shan, WU Guang, DUAN Xiang-Jie, XIAO Li-Xing

2011, 25(6): 565-571. doi: 10.11858/gywlxb.2011.06.013

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Abstract:
Study on partial embedment of projectile (PEP) is put forward with the development of modern science and technology. The outer part of PEP standing stably can form an obstacle or induce the selective object to attack it by waiting for the proper chance, or act as the loading point to realize the spe...

Influence of FeMn Powder Catalyst on the Synthesis of Diamond

LIU Wan-Qiang, MA Hong-An, JIA Xiao-Peng

2011, 25(6): 572-576. doi: 10.11858/gywlxb.2011.06.014

PDF (661)

Abstract:
FeMn powder catalyst was employed to synthesize diamond in China-type cubic high-pressure apparatus. Fine single crystal diamond was successfully obtained in the graphite-FeMn system at 5.7 GPa and 1 550 ℃. The optical imaging microscopy observations show that all the synthesized diamond is in light...

2011 Vol. 25, No. 6

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