2018 Vol. 38, No. 4
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2018, 38(4): 707-715.
doi: 10.11883/bzycj-2016-0329
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Abstract:
In this study we fabricated four kinds of unpoled PZT95/5 ferroelectric ceramics in a range of different porosity levels by systematic additions of pore formers and investigated the high strain rate response of the unpoled PZT95/5 using the ultra-hig...
In this study we fabricated four kinds of unpoled PZT95/5 ferroelectric ceramics in a range of different porosity levels by systematic additions of pore formers and investigated the high strain rate response of the unpoled PZT95/5 using the ultra-hig...
2018, 38(4): 716-724.
doi: 10.11883/bzycj-2017-0383
Abstract:
The rockburst process was reproduced using a true-triaixal rockburst test system in laboratory. The sound signal in the rockburst process was recorded and preprocessed, and the feature indexes of the sound signals in three typical failures in the roc...
The rockburst process was reproduced using a true-triaixal rockburst test system in laboratory. The sound signal in the rockburst process was recorded and preprocessed, and the feature indexes of the sound signals in three typical failures in the roc...
2018, 38(4): 725-734.
doi: 10.11883/bzycj-2016-0283
Abstract:
The coupled smoothed particle hydrodynamics-finite element method (SPH-FEM) has been gradually introduced in some researches about the impact dynamics due to its combined advantages of the two algorithms, but the early research focused mostly on simp...
The coupled smoothed particle hydrodynamics-finite element method (SPH-FEM) has been gradually introduced in some researches about the impact dynamics due to its combined advantages of the two algorithms, but the early research focused mostly on simp...
2018, 38(4): 735-742.
doi: 10.11883/bzycj-2016-0340
Abstract:
In this study we firstly calculated the parameters of equation of state (EOS) for ideal gas considering temperature and relative humidity to obtain the calculation models for parameters of the blasting shock wave in ambient temperature and humidity. ...
In this study we firstly calculated the parameters of equation of state (EOS) for ideal gas considering temperature and relative humidity to obtain the calculation models for parameters of the blasting shock wave in ambient temperature and humidity. ...
2018, 38(4): 743-748.
doi: 10.11883/bzycj-2016-0330
Abstract:
In this study we performed experiment on JBO-9021, a new kind of high insensitive explosive, in which the mass fractions of TATB, HMX and binder are 80%, 15% and 5%, respectively, under strong shock and achieved its particle velocity histories using ...
In this study we performed experiment on JBO-9021, a new kind of high insensitive explosive, in which the mass fractions of TATB, HMX and binder are 80%, 15% and 5%, respectively, under strong shock and achieved its particle velocity histories using ...
2018, 38(4): 749-758.
doi: 10.11883/bzycj-2016-0389
Abstract:
Dynamic expansion crack freezing recovery tests of 6061 aluminum alloy thin-walled cylindrical tubes with different roughnesses after surface processing were carried out with the split Hopkinson pressure bar experimental technique, and the crack init...
Dynamic expansion crack freezing recovery tests of 6061 aluminum alloy thin-walled cylindrical tubes with different roughnesses after surface processing were carried out with the split Hopkinson pressure bar experimental technique, and the crack init...
2018, 38(4): 759-767.
doi: 10.11883/bzycj-2016-0349
Abstract:
In this study, we set up a finite element model for a carbon fiber reinforced polymer (CFRP)-concrete-steel composite structure under low-velocity impact load using ABAQUS. The analytic results from our model were found to agree well with the test re...
In this study, we set up a finite element model for a carbon fiber reinforced polymer (CFRP)-concrete-steel composite structure under low-velocity impact load using ABAQUS. The analytic results from our model were found to agree well with the test re...
2018, 38(4): 768-776.
doi: 10.11883/bzycj-2016-0334
Abstract:
As a major technique for rock breakage, the drill and blast method brings about serious blasting vibration that poses hazards for the structural stability of the shaft wall. In this paper, we simulated the interactive process of the blasting seismic ...
As a major technique for rock breakage, the drill and blast method brings about serious blasting vibration that poses hazards for the structural stability of the shaft wall. In this paper, we simulated the interactive process of the blasting seismic ...
2018, 38(4): 777-784.
doi: 10.11883/bzycj-2016-0395
Abstract:
For a better characterization of the correlation between the rotating detonation combustion chamber and the turbine, the characteristics of the rotating detonation outlet's flow field with equivalent hydrogen-air mixture were investigated numerically...
For a better characterization of the correlation between the rotating detonation combustion chamber and the turbine, the characteristics of the rotating detonation outlet's flow field with equivalent hydrogen-air mixture were investigated numerically...
2018, 38(4): 785-794.
doi: 10.11883/bzycj-2016-0383
Abstract:
In order to obtain the dynamic response of the pre-cracked tunnel under impact loads, we investigated the crack propagation characteristics in the tunnel using the green sandstone as the model material of the tunnel, and the self-developed adjustable...
In order to obtain the dynamic response of the pre-cracked tunnel under impact loads, we investigated the crack propagation characteristics in the tunnel using the green sandstone as the model material of the tunnel, and the self-developed adjustable...
2018, 38(4): 795-803.
doi: 10.11883/bzycj-2016-0359
Abstract:
To obtain the optimal pre-splitting hole spacing in a retained gob-side entry formed by roof cutting and pressure releasing, we investigated the directional pre-splitting of the roadway roof under bilateral cumulative tensile explosion using the LS-D...
To obtain the optimal pre-splitting hole spacing in a retained gob-side entry formed by roof cutting and pressure releasing, we investigated the directional pre-splitting of the roadway roof under bilateral cumulative tensile explosion using the LS-D...
2018, 38(4): 804-810.
doi: 10.11883/bzycj-2016-0333
Abstract:
In this paper, we studied the quasi-static performance and the dynamic compression and tensile properties of the Q235 steel at temperatures ranging from the room temperature to 900 ℃ using a universal testing machine and the split Hopkinson bar syste...
In this paper, we studied the quasi-static performance and the dynamic compression and tensile properties of the Q235 steel at temperatures ranging from the room temperature to 900 ℃ using a universal testing machine and the split Hopkinson bar syste...
2018, 38(4): 811-819.
doi: 10.11883/bzycj-2016-0337
Abstract:
To investigate the calculation method and the characteristics of the impact load for a large commercial aircraft impacting a nuclear power plant, we developed an integral test measurement system using the experiments of aircraft models impacting a mo...
To investigate the calculation method and the characteristics of the impact load for a large commercial aircraft impacting a nuclear power plant, we developed an integral test measurement system using the experiments of aircraft models impacting a mo...
2018, 38(4): 820-826.
doi: 10.11883/bzycj-2016-0354
Abstract:
The thin-wall obstruction block structure plays a significant role in energy absorbing guardrail systems. Research on the methods to improve the guardrail protection capability and minimize the passenger injury becomes increasingly more important. In...
The thin-wall obstruction block structure plays a significant role in energy absorbing guardrail systems. Research on the methods to improve the guardrail protection capability and minimize the passenger injury becomes increasingly more important. In...
2018, 38(4): 827-833.
doi: 10.11883/bzycj-2017-0173
Abstract:
In this study, using a split Hopkinson pressure bar (SHPB) system, we conducted the impact tests of sandstone at different impact velocities to collect the characteristics of the strain rate effect and obtained the typical dynamic constitutive curve ...
In this study, using a split Hopkinson pressure bar (SHPB) system, we conducted the impact tests of sandstone at different impact velocities to collect the characteristics of the strain rate effect and obtained the typical dynamic constitutive curve ...
2018, 38(4): 834-840.
doi: 10.11883/bzycj-2016-0387
Abstract:
Mechanical tests of high-nitrogen austenitic stainless steel (HNS) were performed at strain rates of 102-103 s-1 generated by a split Hopkinson bar apparatus and under different temperatures from 293 K to 873 K. The influences of strain rate and temp...
Mechanical tests of high-nitrogen austenitic stainless steel (HNS) were performed at strain rates of 102-103 s-1 generated by a split Hopkinson bar apparatus and under different temperatures from 293 K to 873 K. The influences of strain rate and temp...
2018, 38(4): 841-846.
doi: 10.11883/bzycj-2016-0335
Abstract:
In our study, we established a finite element model using Abaqus, a commercially available software, to simulate the dynamic response of a cold-formed thin-wall steel lipped channel under axial compact, and verified its reliability by the highly cons...
In our study, we established a finite element model using Abaqus, a commercially available software, to simulate the dynamic response of a cold-formed thin-wall steel lipped channel under axial compact, and verified its reliability by the highly cons...
2018, 38(4): 847-854.
doi: 10.11883/bzycj-2016-0314
Abstract:
In the present paper, we proposed a two-dimensional finite difference method (FDM) of characteristic lines to address problems of the non-isentropic steady flow of cylindrical explosive underwater explosion. This method describes the non-isentropic e...
In the present paper, we proposed a two-dimensional finite difference method (FDM) of characteristic lines to address problems of the non-isentropic steady flow of cylindrical explosive underwater explosion. This method describes the non-isentropic e...
2018, 38(4): 855-862.
doi: 10.11883/bzycj-2017-0093
Abstract:
In this study, we investigated the effect of underwater explosion of CL-20-based explosive and CL-20-based aluminized explosive, by examining the dynamics of the bubble pulses generated by CL-20-based explosives charge underwater explosions in a 2 m×...
In this study, we investigated the effect of underwater explosion of CL-20-based explosive and CL-20-based aluminized explosive, by examining the dynamics of the bubble pulses generated by CL-20-based explosives charge underwater explosions in a 2 m×...
2018, 38(4): 863-868.
doi: 10.11883/bzycj-2016-0394
Abstract:
In order to understand the effect of axial pulse magnetic field on the shaped charge jet (SCJ), we designed an experiment system and carried out related experiments based on the mechanism of a high-explosive anti-tank (HEAT) penetrating a target and ...
In order to understand the effect of axial pulse magnetic field on the shaped charge jet (SCJ), we designed an experiment system and carried out related experiments based on the mechanism of a high-explosive anti-tank (HEAT) penetrating a target and ...
2018, 38(4): 869-875.
doi: 10.11883/bzycj-2016-0376
Abstract:
In this work, to realize explosive directed loading metal particles of low collateral damage ammunition, we developed a launching device and used it to carry out the dispersing of tungsten particles of different sizes and charging ratios. We captured...
In this work, to realize explosive directed loading metal particles of low collateral damage ammunition, we developed a launching device and used it to carry out the dispersing of tungsten particles of different sizes and charging ratios. We captured...
2018, 38(4): 876-882.
doi: 10.11883/bzycj-2016-0342
Abstract:
The lethality of the circumferential direction fragment field of the warhead has improved greatly due to the premade fragment technique, but the axial fragments are still too few to block the battle space completely. Aiming to improve the distributio...
The lethality of the circumferential direction fragment field of the warhead has improved greatly due to the premade fragment technique, but the axial fragments are still too few to block the battle space completely. Aiming to improve the distributio...
2018, 38(4): 883-890.
doi: 10.11883/bzycj-2016-0356
Abstract:
In order to further improve the damage capacity of the multiple explosively formed penetrator (MEFP) warhead, we designed a rod-shaped and explosively formed penetrator warhead. We firstly investigated the formation process and scattering effect of t...
In order to further improve the damage capacity of the multiple explosively formed penetrator (MEFP) warhead, we designed a rod-shaped and explosively formed penetrator warhead. We firstly investigated the formation process and scattering effect of t...
2018, 38(4): 891-897.
doi: 10.11883/bzycj-2016-0323
Abstract:
It is known that low-temperature is apt to cause skin frost bite and material embrittlement, and that the propagation law of gas explosion is the foundation of explosion evolution and accident analysis. In this paper, we investigated the process of e...
It is known that low-temperature is apt to cause skin frost bite and material embrittlement, and that the propagation law of gas explosion is the foundation of explosion evolution and accident analysis. In this paper, we investigated the process of e...
2018, 38(4): 898-904.
doi: 10.11883/bzycj-2016-0344
Abstract:
Vented explosion tests were carried out in a 12 m3 concrete chamber filled with premixed methane-air mixture with the methane volume fraction of 9.5%, and the influence of the ignition position on the development of overpressure and the evolution of ...
Vented explosion tests were carried out in a 12 m3 concrete chamber filled with premixed methane-air mixture with the methane volume fraction of 9.5%, and the influence of the ignition position on the development of overpressure and the evolution of ...
2018, 38(4): 905-912.
doi: 10.11883/bzycj-2017-0064
Abstract:
The combinations which were structured from three categories of porous materials including six sub-categories, were tested for studying the suppression effects of the porous materials on the explosion of the combustible gas. The combustible gas was t...
The combinations which were structured from three categories of porous materials including six sub-categories, were tested for studying the suppression effects of the porous materials on the explosion of the combustible gas. The combustible gas was t...
2018, 38(4): 913-917.
doi: 10.11883/bzycj-2016-0331
Abstract:
The present work was carried for the prevention of increasingly ever prevalent gas explosion accidents that had occurred in the coexistence of gas and coal dust in recent years. Using a 20 L explosion test system, we studied experimentally the explos...
The present work was carried for the prevention of increasingly ever prevalent gas explosion accidents that had occurred in the coexistence of gas and coal dust in recent years. Using a 20 L explosion test system, we studied experimentally the explos...
2018, 38(4): 918-924.
doi: 10.11883/bzycj-2016-0260
Abstract:
In the present work, the vibration velocities of the ground, roof and top of the 40 kg TNT equivalent blast containment chamber resulting respectively from 15, 20, 25 and 40 kg TNT explosion were monitored using velocity sensors and geophones. The me...
In the present work, the vibration velocities of the ground, roof and top of the 40 kg TNT equivalent blast containment chamber resulting respectively from 15, 20, 25 and 40 kg TNT explosion were monitored using velocity sensors and geophones. The me...
2018, 38(4): 925-930.
doi: 10.11883/bzycj-2016-0377
Abstract:
Based on the fractal damage evolution law of high strength concrete (HSC) specimen by the SHPB impact test, we deduced the patterns of the fractal damage variables of HSC, and calibrated the fractal dimension range of the HSC cracks. Then following t...
Based on the fractal damage evolution law of high strength concrete (HSC) specimen by the SHPB impact test, we deduced the patterns of the fractal damage variables of HSC, and calibrated the fractal dimension range of the HSC cracks. Then following t...
2018, 38(4): 931-936.
doi: 10.11883/bzycj-2016-0378
Abstract:
We simulated the launching progress of SSAGIT using the computational fluid dynamics (CFD) and the velocity of the impact car obtained from calculation are consistent with the experiment results. Based on this, we investigated the flow field, the pre...
We simulated the launching progress of SSAGIT using the computational fluid dynamics (CFD) and the velocity of the impact car obtained from calculation are consistent with the experiment results. Based on this, we investigated the flow field, the pre...
