2018 Vol. 38, No. 2
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2018, 38(2): 241-249.
doi: 10.11883/bzycj-2016-0238
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Abstract:
In this study we conducted an experiment on the jetting flow induced by underwater wire explosion at an interface with a quasi-static hemispherical pit, in which the interfacial pit was created by the dripping of a liquid drop. Further, using high-sp...
In this study we conducted an experiment on the jetting flow induced by underwater wire explosion at an interface with a quasi-static hemispherical pit, in which the interfacial pit was created by the dripping of a liquid drop. Further, using high-sp...
2018, 38(2): 250-257.
doi: 10.11883/bzycj-2017-0198
Abstract:
As the impact velocity increases, the penetration mechanism varies from rigid penetration to semi-liquid penetration and fluid penetration, each of which follows a wholly different analytical model. In the semi-liquid penetration stage, the mass loss...
As the impact velocity increases, the penetration mechanism varies from rigid penetration to semi-liquid penetration and fluid penetration, each of which follows a wholly different analytical model. In the semi-liquid penetration stage, the mass loss...
2018, 38(2): 258-265.
doi: 10.11883/bzycj-2017-0019
Abstract:
This paper presents a novel method for directly measuring material strength under dynamic loading, namely the technique of magnetically applied pressure shear (MAPS). The relationship between the stress deviation and the yield strength under MAPS was...
This paper presents a novel method for directly measuring material strength under dynamic loading, namely the technique of magnetically applied pressure shear (MAPS). The relationship between the stress deviation and the yield strength under MAPS was...
2018, 38(2): 266-270.
doi: 10.11883/bzycj-2016-0252
Abstract:
In the present study we carried out the dynamic compression experiments of steel fiber reinforced concrete with the fiber volume ratios of 0%, 0.75% and 1.5% using the ∅75 mm large-diameter split Hopkinson pressure bar experimental system to obtain t...
In the present study we carried out the dynamic compression experiments of steel fiber reinforced concrete with the fiber volume ratios of 0%, 0.75% and 1.5% using the ∅75 mm large-diameter split Hopkinson pressure bar experimental system to obtain t...
2018, 38(2): 271-278.
doi: 10.11883/bzycj-2016-0216
Abstract:
In this paper we studied a pseudo arc-length method for high-precision and high-resolution calculation, a problem that has been a great challenge for numerical simulation of strong discontinuity for explosion shock wave. By the introduction of the ar...
In this paper we studied a pseudo arc-length method for high-precision and high-resolution calculation, a problem that has been a great challenge for numerical simulation of strong discontinuity for explosion shock wave. By the introduction of the ar...
2018, 38(2): 279-288.
doi: 10.11883/bzycj-2016-0224
Abstract:
The dynamic response of hybrid corrugated sandwich plates subjected to combined effects of blast and fragment loading was analyzed using finite element analysis code LS-DYNA. The effects of charge mass, loading type and filling strategy on deformatio...
The dynamic response of hybrid corrugated sandwich plates subjected to combined effects of blast and fragment loading was analyzed using finite element analysis code LS-DYNA. The effects of charge mass, loading type and filling strategy on deformatio...
2018, 38(2): 289-294.
doi: 10.11883/byzcj-2016-0251
Abstract:
In this work we at first designed and performed some small-scale explosion compaction (EC) outdoor experiments to study the application of EC technology in loess and to verify the feasibility and reliability of numerical simulation by computer softwa...
In this work we at first designed and performed some small-scale explosion compaction (EC) outdoor experiments to study the application of EC technology in loess and to verify the feasibility and reliability of numerical simulation by computer softwa...
2018, 38(2): 295-301.
doi: 10.11883/bzycj-2016-0186
Abstract:
By using an electronic universal testing machine and a modified split Hopkinson pressure bar device, the uniaxial compressive mechanical behaviours of glass used as the windshield of aircraft was tested. The experiments were finished at two quasi-sta...
By using an electronic universal testing machine and a modified split Hopkinson pressure bar device, the uniaxial compressive mechanical behaviours of glass used as the windshield of aircraft was tested. The experiments were finished at two quasi-sta...
2018, 38(2): 302-308.
doi: 10.11883/bzycj-2016-0230
Abstract:
In this study we carried out a series of experiments on large specimens (1 m×1 m×0.5 m) of coal and concrete using an explosive device and similar material test bench with multi-channel electro hydraulic servo to improve the application of the superc...
In this study we carried out a series of experiments on large specimens (1 m×1 m×0.5 m) of coal and concrete using an explosive device and similar material test bench with multi-channel electro hydraulic servo to improve the application of the superc...
2018, 38(2): 309-315.
doi: 10.11883/bzycj-2016-0271
Abstract:
Effected by micro-jetting, the usual measuring technologies are hard to recognise the front surface of micro-spall of a metal sample that is of complex structure. In this paper, a step-signal electric-probe measuring technology is proposed to solve t...
Effected by micro-jetting, the usual measuring technologies are hard to recognise the front surface of micro-spall of a metal sample that is of complex structure. In this paper, a step-signal electric-probe measuring technology is proposed to solve t...
A dynamic damage constitutive model for rockmass with intermittent joints under uniaxial compression
2018, 38(2): 316-323.
doi: 10.11883/bzycj-2016-0261
Abstract:
The intermittent joints have obvious effect on the strength and deformability of engineering rockmass. The joint is assumed to be a kind of macroscopic damage to the rockmass in the damage mechanics, therefore the damage tensor is adopted to describe...
The intermittent joints have obvious effect on the strength and deformability of engineering rockmass. The joint is assumed to be a kind of macroscopic damage to the rockmass in the damage mechanics, therefore the damage tensor is adopted to describe...
2018, 38(2): 324-330.
doi: 10.11883/bzycj-2016-0235
Abstract:
It is well known that the ultrafine silicon dioxide powder has a certain suppressing effect on the wheat starch flame. In this work, we explore the difference in this effect on the silicon dioxide powder due to different particle sizes, the changes o...
It is well known that the ultrafine silicon dioxide powder has a certain suppressing effect on the wheat starch flame. In this work, we explore the difference in this effect on the silicon dioxide powder due to different particle sizes, the changes o...
2018, 38(2): 331-338.
doi: 10.11883/bzycj-2016-0240
Abstract:
In this paper, based on two-dimensional conservation element and solution element(CE/SE), we simulated the detonation process of CRDE with gasoline and oxygen-enriched air to study the influence of liquid fuel on the detonation characteristics of the...
In this paper, based on two-dimensional conservation element and solution element(CE/SE), we simulated the detonation process of CRDE with gasoline and oxygen-enriched air to study the influence of liquid fuel on the detonation characteristics of the...
2018, 38(2): 339-344.
doi: 10.11883/bzycj-2016-0231
Abstract:
It is necessary to determine the greatest possible load that a civil building can bear in a gas explosion in a quick safety assessment of the building. In this paper, according to the principle of virtual displacements, we derived the function relati...
It is necessary to determine the greatest possible load that a civil building can bear in a gas explosion in a quick safety assessment of the building. In this paper, according to the principle of virtual displacements, we derived the function relati...
2018, 38(2): 345-352.
doi: 10.11883/bzycj-2016-0214
Abstract:
The propagation and spatial distribution of the divergent shock wave in PMMA under the restriction of a metal cylindrical shell were studied using experiment and numerical simulation. The flyer was driven by the cylinder high explosive initiated by a...
The propagation and spatial distribution of the divergent shock wave in PMMA under the restriction of a metal cylindrical shell were studied using experiment and numerical simulation. The flyer was driven by the cylinder high explosive initiated by a...
2018, 38(2): 353-358.
doi: 10.11883/bzycj-2016-0218
Abstract:
In this paper, we tested the minimum ingition energy (MIE) of methane at low temperature using an experimental apparatus fabricated by ourselves to characterize the explosion of methane at a low temperature ranging from -90 to 0 ℃ and under a pressur...
In this paper, we tested the minimum ingition energy (MIE) of methane at low temperature using an experimental apparatus fabricated by ourselves to characterize the explosion of methane at a low temperature ranging from -90 to 0 ℃ and under a pressur...
2018, 38(2): 359-366.
doi: 10.11883/bzycj-2016-0211
Abstract:
The effect of the large-scale explosion venting component on the interior deflagration pressure at different volume fractions of ethylene was studied by installing a vent panel on the end of the cavity whose size is 2 m×1.2 m×0.6 m. Two vent panels w...
The effect of the large-scale explosion venting component on the interior deflagration pressure at different volume fractions of ethylene was studied by installing a vent panel on the end of the cavity whose size is 2 m×1.2 m×0.6 m. Two vent panels w...
2018, 38(2): 367-372.
doi: 10.11883/bzycj-2016-0209
Abstract:
This paper studies the radial energy output of double-layer charge overpressure detonation based on the tests of single charge and double-layer charge explosion carried out on shock wave overpressure using ideal and non-ideal explosive of TNT, JO-8 a...
This paper studies the radial energy output of double-layer charge overpressure detonation based on the tests of single charge and double-layer charge explosion carried out on shock wave overpressure using ideal and non-ideal explosive of TNT, JO-8 a...
2018, 38(2): 373-380.
doi: 10.11883/bzycj-2016-0232
Abstract:
In this work, by inserting an additional sheet, called the middle sheet, between the upper and lower sheets of a traditional single-layer foam core sandwich panel consisting of a core with bonded with two sheets on either side, we fabricated sandwich...
In this work, by inserting an additional sheet, called the middle sheet, between the upper and lower sheets of a traditional single-layer foam core sandwich panel consisting of a core with bonded with two sheets on either side, we fabricated sandwich...
2018, 38(2): 381-389.
doi: 10.11883/bzycj-2016-0198
Abstract:
An experimental study on the characteristics of propane/air and propane/hydrogen/air flame propagation, at ambient temperature and pressure, was carried out in a narrow-gapped micro-chamber shaped like a disk and 150 mm in diameter, which was ignited...
An experimental study on the characteristics of propane/air and propane/hydrogen/air flame propagation, at ambient temperature and pressure, was carried out in a narrow-gapped micro-chamber shaped like a disk and 150 mm in diameter, which was ignited...
2018, 38(2): 390-396.
doi: 10.11883/bzycj-2016-0180
Abstract:
To investigate the stress relieving mechanism and the effect of the non-coupling blasting on the high-stress area in a coal tunnel, we carried out theoretical analysis and laboratory experiment, followed by in-situ verification and numerical simulati...
To investigate the stress relieving mechanism and the effect of the non-coupling blasting on the high-stress area in a coal tunnel, we carried out theoretical analysis and laboratory experiment, followed by in-situ verification and numerical simulati...
2018, 38(2): 397-403.
doi: 10.11883/bzycj-2016-0177
Abstract:
Dynamic behaviors of metal materials subjected to intense shock loading is presently a focus in basic research and engineering application in the field of shock wave study. This work investigated dynamic behaviors within the metal Pb loaded by two ob...
Dynamic behaviors of metal materials subjected to intense shock loading is presently a focus in basic research and engineering application in the field of shock wave study. This work investigated dynamic behaviors within the metal Pb loaded by two ob...
2018, 38(2): 404-408.
doi: 10.11883/bzycj-2016-0191
Abstract:
Focusing on the state of explosion overpressure field, a number of pressure transducers were installed in the axial and radial directions in the large-scale space. The explosion overpressure fields at different volume fractions of natural gas were re...
Focusing on the state of explosion overpressure field, a number of pressure transducers were installed in the axial and radial directions in the large-scale space. The explosion overpressure fields at different volume fractions of natural gas were re...
2018, 38(2): 409-418.
doi: 10.11883/bzycj-2016-0256
Abstract:
In this paper, the process of the plane incident shock wave shocking a magnetized R22 heavy circular gas column with different initial magnetic field was numerically studied based on the magneto-hydrodynamic (MHD) equation and CTU+CT method. The nume...
In this paper, the process of the plane incident shock wave shocking a magnetized R22 heavy circular gas column with different initial magnetic field was numerically studied based on the magneto-hydrodynamic (MHD) equation and CTU+CT method. The nume...
2018, 38(2): 419-425.
doi: 10.11883/bzycj-2016-0222
Abstract:
A series of experiments were carried out to explore the effects of high-g shock load on the electrical parameters (capacitance and leakage current) of the solid tantalum capacitor. The results show that the capacitance increases with the increase of ...
A series of experiments were carried out to explore the effects of high-g shock load on the electrical parameters (capacitance and leakage current) of the solid tantalum capacitor. The results show that the capacitance increases with the increase of ...
Validity analysis of materials' dynamic tensile SHTB experimental technique at ultrahigh temperature
2018, 38(2): 426-436.
doi: 10.11883/bzycj-2016-0259
Abstract:
In this work we investigated several key issues in view of the dynamic tensile experimental technique used in the split Hopkinson tension bar at ultra high temperature by performing numerical simulation, experimental verification and tests of several...
In this work we investigated several key issues in view of the dynamic tensile experimental technique used in the split Hopkinson tension bar at ultra high temperature by performing numerical simulation, experimental verification and tests of several...
2018, 38(2): 437-442.
doi: 10.11883/bzycj-2016-0241
Abstract:
In this paper we investigated underwater-explosion shock wave propagation using the ultrahigh-speed simultaneous framing and streak photography, a system newly developed by ourselves. The results show that this system is able to record simultaneously...
In this paper we investigated underwater-explosion shock wave propagation using the ultrahigh-speed simultaneous framing and streak photography, a system newly developed by ourselves. The results show that this system is able to record simultaneously...
2018, 38(2): 443-454.
doi: 10.11883/bzycj-2016-0201
Abstract:
In this paper the simplified calculation methods of internal pressure, structure load and dynamic response in gas deflagration in buildings were reviewed based on the current research achievements of gas explosion in confined space, including mainly ...
In this paper the simplified calculation methods of internal pressure, structure load and dynamic response in gas deflagration in buildings were reviewed based on the current research achievements of gas explosion in confined space, including mainly ...
2018, 38(2): 455-464.
doi: 10.11883/bzycj-2017-0117
Abstract:
A semi-confined vessel was built to study the explosion of the gasoline/air mixture ignited by a pilot flame. The flame propagation at different gasoline/air volume fractions were characterized through the flame images from a high-speed camera. The p...
A semi-confined vessel was built to study the explosion of the gasoline/air mixture ignited by a pilot flame. The flame propagation at different gasoline/air volume fractions were characterized through the flame images from a high-speed camera. The p...
2018, 38(2): 465-472.
doi: 10.11883/bzycj-2015-0242
Abstract:
In this paper, we studied the characteristics of the fuel-air mixture explosion using an experiment system built in a short pipe containing a weakly confined face at the end, with the following results achieved. (1) Multiple pressure peaks were obser...
In this paper, we studied the characteristics of the fuel-air mixture explosion using an experiment system built in a short pipe containing a weakly confined face at the end, with the following results achieved. (1) Multiple pressure peaks were obser...
