高压物理学报

High Pressure Dissociation of Typical Diatomic Molecular Solids and Their Atomic Phases

LI Quan, MA Yan-Ming

2013, 27(3): 313-324. doi: 10.11858/gywlxb.2013.03.001

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Abstract:
High pressure can effectively modify the inter-atomic interaction of materials (i.e., the electron orbital overlap, chemical bonding, and electron charge distribution of materials), and further the crystal structures, mechanical, thermal, optical and electrical properties of materials. For more than...

Ambient Humidity Influence on Explosion Characteristics Parameters of Gaseous Epoxypropane

TAN Ru-Mei, ZHANG Qi, HUANG Ying

2013, 27(3): 325-330. doi: 10.11858/gywlxb.2013.03.002

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Abstract:
To evaluate the hazard of gaseous epoxypropane-air explosions, characteristic parameters of gaseous epoxypropane explosion inside 5 L-sphere closed vessel with 40% and 88% relative humidity were measured. The obtained results show that: Maximum overpressures reduce slightly at near optimum explosion...

Reactive Hydrokinetics in the Early Stage of Shock Initiation of PBX 9501

CHEN Jun, TIAN Zhan-Dong, ZENG Dai-Peng, ZHANG Zhen-Yu, DUAN Zhuo-Ping

2013, 27(3): 331-336. doi: 10.11858/gywlxb.2013.03.003

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Abstract:
Through the application of Lambourn's CIM model, a simplified analytic method was proposed to study the post-shock reactive flow in the case of unknowing the real formula of reaction rate. Based on this method, a more reasonable empirical reaction rate can be extracted to better understand the initi...

Microstructure and Mechanical Properties of Internal Thread during Cold Extrusion for Q460 High Strength Steel

MIAO Hong, ZUO Dun-Wen, ZHANG Rui-Hong

2013, 27(3): 337-342. doi: 10.11858/gywlxb.2013.03.004

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Abstract:
According to the forming process of internal thread, the microstructure, microhardness and mechanical properties of internal thread surface layer were investigated. The microstructure change and deformation mechanism, harden ability and depth of hardening layers on the crest, the flank and the root ...

Application of the MVPPM-Based Fluid-Solid Coupling Method to the Explosion Vessel Simulations

BAI Jing-Song, LIU Kun, ZHANG Hong-Ping, LI Lei, LI Ping

2013, 27(3): 343-351. doi: 10.11858/gywlxb.2013.03.005

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Abstract:
The flow field evolvements inside the explosion vessel volume and the dynamic response of the vessel shell are basic data in designing of the vessel shape, structure and material selection. But for some reason of the vessel large scale, multi-component, high-density ratio and complex structure, and ...

Cell-Centered Arbitrary Lagrangian-Eulerian Method Based on a Global Grid Generation Technology

LIU Yan, SHEN Wei-Dong, TIAN Bao-Lin

2013, 27(3): 352-360. doi: 10.11858/gywlxb.2013.03.006

PDF (343)

Abstract:
A cell-centered arbitrary Lagrangian-Eulerian method based on a global grid generation technology was developed to simulate compressible multimaterial flows with large deformation. The method adapts well to subdomain grid generation and global grid generation. The static and dynamic numerical exampl...

Effects of Strain Rate and Temperature on Compressive Properties of an Aluminized PBX

CHEN Ding-Ding, LU Fang-Yun, LIN Yu-Liang, JIANG Bang-Hai

2013, 27(3): 361-366. doi: 10.11858/gywlxb.2013.03.007

PDF (408)

Abstract:
Weapons have to face some extremely abominable situations, such as high temperature, high pressure, shock loadings, etc. In such situations, the mechanical properties of the high explosive filled in weapons will decide the level of security of the whole system, making it necessary to get a deep unde...

One-Dimensional Model and Calculation for Fast Cook-off of RDX

TIAN Zhan-Dong, ZHANG Zhen-Yu, LU Fang-Yun, ZHAO Jian-Heng, TAN Fu-Li

2013, 27(3): 367-371. doi: 10.11858/gywlxb.2013.03.008

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Abstract:
Based on gas-phase reaction mechanism, a fast cook-off model was established to study the process of RDX in a confined vessel irradiated by laser. The model considers steel vessel, air gap and condensed explosives. The heat conduction in air gap was used to describe the nonideal thermal contact. The...

Penetration and Perforation of Thick Metal Targets Subjected to Impact by Ogival-Nosed Projectiles

WU Qiao-Guo, WEN He-Ming

2013, 27(3): 372-378. doi: 10.11858/gywlxb.2013.03.009

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Abstract:
An analytical investigation into the penetration and perforation of thick metal targets struck normally by rigid ogival-nosed projectiles over a wide range of velocities was conducted. Based on the assumption that the deformation is localized and that the mean pressure offered by the target material...

Research on Working Performance of Small Spinning Solid Rocket Motor

YANG Wei-Ling, WANG Zai-Cheng, JIANG Chun-Lan, LI Ming

2013, 27(3): 379-384. doi: 10.11858/gywlxb.2013.03.010

PDF (377)

Abstract:
The small spinning solid rocket motor was employed to perform as the power of the radial twice throwing system. Interior ballistic model of spinning solid rocket motor, in which eroding burn effect was considered, was established. The calculated pressure-time curve was set as initial pressure value ...

Analysis of the Onset of Detonation in the DDT Process for Combustible Mixture

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

2013, 27(3): 385-390. doi: 10.11858/gywlxb.2013.03.011

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Abstract:
For comparison with several methods used to define the location of the onset of detonation, several of experiments were performed to study on the deflagration to detonation transition (DDT) for premixed C2H2+2.5O2 mixture in a shock tube. A high-speed digital camera was used to track the velocities ...

Numerical Simulation of Debris Cloud Characteristics of the Mesh Shields

PANG Bao-Jun, LIN Min, ZHANG Kai, FU Xiang

2013, 27(3): 391-397. doi: 10.11858/gywlxb.2013.03.012

PDF (290)

Abstract:
The hypervelocity impact interaction of the sphere projectile with continuous shield and mesh shield, which were of the same thickness or area density, was investigated numerically. The study was aimed at mastering the hypervelocity impact characteristics of the mesh shield and applying effectively ...

Flash X-Ray Radiography for Diagnosing the Ejecta from Shocked Metal Surface

YE Yan, LI Jun, ZHU Peng-Fei, QIAN Wei-Xin, LIU Zhen-Qing, WANG Xiao, LI Xin-Zhu, LI Zuo-You, LI Ze-Ren, ZHONG Jie

2013, 27(3): 398-402. doi: 10.11858/gywlxb.2013.03.013

PDF (461)

Abstract:
The flash X-ray radiography is an important diagnostic tool for the ejecta from shocked metal surface. The influence of metal surface characteristics on the ejecta is a main aspect of numerical simulations and experiments on ejecta phenomena from shocked metal surface. A commercial flash X-ray tube,...

Numerical Study on the Damage of the Coal under Blasting Loads Coupled with Geostatic Stress

MU Chao-Min, PAN Fei

2013, 27(3): 403-410. doi: 10.11858/gywlxb.2013.03.014

PDF (381)

Abstract:
In order to investigate on cracks propagation of the coal under column charge blasting subjected to geostatic stress, the damage constitutive model was established by considering tension and compression. The improved damage constitutive model was embedded in the FEM software to study the mechanics o...

Experimental Study and Numerical Simulation on Deformation of Diamond and Sample under DAC Loading

JING Qiu-Min, WU Qiang, BI Yan, YU Ji-Dong, XU Ji-An

2013, 27(3): 411-416. doi: 10.11858/gywlxb.2013.03.015

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Abstract:
The compression experiment of molybdenum foil combined with finite element modeling calculation reveals the history of elastic deformation of diamond and elastic-plastic deformation of sample in the pressure gradient method used for measurement of yield strength at high pressures. The influence from...

Experimental Study on Concrete Exposed to High Temperature under Impact Loading

LI Zhi-Wu, XU Jin-Yu, DAI Shuang-Tian, BAI Er-Lei, GAO Zhi-Gang

2013, 27(3): 417-422. doi: 10.11858/gywlxb.2013.03.016

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Abstract:
Based on the traditional spilt Hopkinson pressure bar (SHPB) apparatus, a SHPB system for testing dynamic compressive properties of materials exposed to high temperature was established after adding a tubular electric furnace, and the dynamic compressive stress-strain curves of concrete at 200-800 ℃...

Numerical Simulation on Shaped Charge Jet Being Disturbed by Shearing Movement of Four-Layer Spaced Plates

SUN Li-Zhi, LI Zhi-Yuan, Lü Qing-Ao

2013, 27(3): 423-430. doi: 10.11858/gywlxb.2013.03.017

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Abstract:
Numerical simulation with ANSYS/LS-DYNA software was accomplished on metal jet being disturbed by shearing movement of four-layer equivalent spaced plates. Disturbing performance of moving plates was analyzed according to jet rupturing forms, energy losing values, and the penetrating depth in target...

Effects of Dynamic High Pressure Microfluidization (DHPM) Extraction on the Antioxidation of Flavonoids from Sweet Potato Leaves and Mechanism Studying

TU Zong-Cai, ZHANG Lu, WANG Hui, YE Yun-Hua, LI Zhi, HUANG Xiao-Qin

2013, 27(3): 431-438. doi: 10.11858/gywlxb.2013.03.018

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Abstract:
Effects of dynamic high pressure micro-fluidization(DHPM) in the extraction processing on the antioxidative activities of flavonoid from sweet potato leaves by DHPM in contrast to the traditional ethanol extraction were performed to explore the possible mechanism in combination with the high perform...

Dynamic Compression and Damage Pattern of Hollow Microsphere/Aluminum Alloy Composites

WANG Shao-Heng, YANG Zhen-Qi, GUAN Gong-Shun, PANG Bao-Jun, CHEN Hai-Bo

2013, 27(3): 439-446. doi: 10.11858/gywlxb.2013.03.019

PDF (314)

Abstract:
The hollow microsphere/aluminum alloy composites were fabricated by press infiltration. The dynamic compression behavior of the composites was investigated by using split Hopkinson pressure bar (SHPB). The microstructure of the specimen after compression was characterized by scanning electron micros...

High Hydrostatic Pressure Pasteurization Effect and Organoleptic Quality Assessment of Vegetables

DONG Peng, YI Jun-Jie, HUA Cheng, ZHANG Yan, HU Xiao-Song, WU Ji-Hong

2013, 27(3): 447-453. doi: 10.11858/gywlxb.2013.03.020

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Abstract:
In order to improve the quality and prolong the shelf-life of vegetables, the effect of high hydrostatic pressure on pasteurization and quality of vegetables was systematically analyzed and assessed by taking white turnip, lettuce and potato as experimental materials. The results were as follows: Th...

Calibration of Standard Hydrophones in the Frequency Range of 20 Hz to 200 kHz at 10 MPa Hydrostatic Pressure

CHEN Yi, HUANG Yong-Jun, FEI Teng

2013, 27(3): 454-460. doi: 10.11858/gywlxb.2013.03.021

PDF (488)

Abstract:
This paper describes the coupler reciprocity method and free-field reciprocity method used for standard hydrophones calibration in the frequency range of 20 Hz to 200 kHz at 10 MPa hydrostatic pressure, and the coupler reciprocity calibration facility working in the frequency from 20 Hz to 3.15 kHz ...

Numerical Simulation of Microscopic Dynamic Behavior in the Copper under Explosively Dynamic Loading

YANG Rui, WANG Jin-Xiang, ZHOU Nan, PENG Chu-Cai, XIE Jun

2013, 27(3): 461-467. doi: 10.11858/gywlxb.2013.03.022

PDF (337)

Abstract:
Voronoi method was adopted to establish the micro-geometry model of polycrystalline copper which can reflect the irregularities of grain geometric shape and grain boundaries. The Tie-Break model was used to reflect the binding characteristics of grain boundary. Then the grains deformation and therma...

Research on Electronic Structure and Optical Properties of Oxygen Atom Adsorbed on GaAs Surface

ZHU Shan-Shan, YIN Chun-Hao, XU Zhen-Kun, WU Cai-Ping, HOU Lei-Tian

2013, 27(3): 468-472. doi: 10.11858/gywlxb.2013.03.023

PDF (377)

Abstract:
Electronic structures and optical properties of oxygen atom adsorbed on GaAs surface have been calculated by using the first-principle based on density functional theory. The results show that the presence of O shifts the energy band to the deep part，with impurity level composed of As 4p and Ga 4p a...

2013 Vol. 27, No. 3

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