2017 Vol. 37, No. 2
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2017, 37(2): 169-179.
doi: 10.11883/1001-1455(2017)02-0169-11
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Abstract:
The strength of a material is traditionally understood as its ability to resist flow/deformation and breakage (brittle fracture or ductile rupture) under applied load. The breakage, though looking like an abrupt occurrence, actually results from a st...
The strength of a material is traditionally understood as its ability to resist flow/deformation and breakage (brittle fracture or ductile rupture) under applied load. The breakage, though looking like an abrupt occurrence, actually results from a st...
2017, 37(2): 180-185.
doi: 10.11883/1001-1455(2017)02-0180-06
Abstract:
A type of 3D-Hopkinson bar dynamic testing system for investigating the dynamic behavior of concrete and rock under static triaxial loading was developed. The hydraulic servo control system employed in the testing system could provide independent tri...
A type of 3D-Hopkinson bar dynamic testing system for investigating the dynamic behavior of concrete and rock under static triaxial loading was developed. The hydraulic servo control system employed in the testing system could provide independent tri...
2017, 37(2): 186-193.
doi: 10.11883/1001-1455(2017)02-0186-08
Abstract:
A complex unsteady multiphase flow field is produced in the process of solid rocket gas jet driven liquid column. In this work, to study the temperature-reducing effect of the liquid column on the jet flow field of the solid rocket motor and reveal t...
A complex unsteady multiphase flow field is produced in the process of solid rocket gas jet driven liquid column. In this work, to study the temperature-reducing effect of the liquid column on the jet flow field of the solid rocket motor and reveal t...
2017, 37(2): 194-200.
doi: 10.11883/1001-1455(2017)02-0194-07
Abstract:
In this work, to obtain a water mist with a finer particle size under lower pressures, reduce the running costs of the explosion-suppressing spray system, and improve its efficiency and applicability, we designed a transparent organic glass pipeline ...
In this work, to obtain a water mist with a finer particle size under lower pressures, reduce the running costs of the explosion-suppressing spray system, and improve its efficiency and applicability, we designed a transparent organic glass pipeline ...
2017, 37(2): 201-207.
doi: 10.11883/1001-1455(2017)02-0201-07
Abstract:
To find out the exact effects of boundary conditions on premixed CH4+2O2 detonation characteristics, detonation experiments were conducted respectively in two cylindrical tubes with inner diameters of 63.5 mm and 50.8 mm and one rectangle tube. The d...
To find out the exact effects of boundary conditions on premixed CH4+2O2 detonation characteristics, detonation experiments were conducted respectively in two cylindrical tubes with inner diameters of 63.5 mm and 50.8 mm and one rectangle tube. The d...
2017, 37(2): 208-214.
doi: 10.11883/1001-1455(2017)02-0208-07
Abstract:
Under a blasting load, the front side adjacent to blasting in an existing tunnel surrounded by layered rocks is apt to be destroyed, and therefore it is of critical importance to keep the tunnel safe from the destructive effects of the surrounding ro...
Under a blasting load, the front side adjacent to blasting in an existing tunnel surrounded by layered rocks is apt to be destroyed, and therefore it is of critical importance to keep the tunnel safe from the destructive effects of the surrounding ro...
2017, 37(2): 215-220.
doi: 10.11883/1001-1455(2016)05-0215-06
Abstract:
In the present work, we carried out an experimental study of the influence of the coal dust categories, concentration and particle size on the coal dust-CO/H2 hybrid mixture's deflagration characteristics in a semi-open environment. The results indic...
In the present work, we carried out an experimental study of the influence of the coal dust categories, concentration and particle size on the coal dust-CO/H2 hybrid mixture's deflagration characteristics in a semi-open environment. The results indic...
2017, 37(2): 221-228.
doi: 10.11883/1001-1455(2017)02-0221-08
Abstract:
Aimed at the faults such as cartridge jamming and component dynamic fracture in the extractor system of an artillery vertical wedge breechblock, this paper was focused on transforming the extracting fault analysis to the quantitative study of the sys...
Aimed at the faults such as cartridge jamming and component dynamic fracture in the extractor system of an artillery vertical wedge breechblock, this paper was focused on transforming the extracting fault analysis to the quantitative study of the sys...
2017, 37(2): 229-236.
doi: 10.11883/1001-1455(2017)02-0229-08
Abstract:
In this work, to further study the features of the shock-wave induced flame instability, the two-dimensional Navier-Stokes (NS) equations with the single-step chemical reaction and the high resolution 9th-order weighted essentially non-oscillatory (W...
In this work, to further study the features of the shock-wave induced flame instability, the two-dimensional Navier-Stokes (NS) equations with the single-step chemical reaction and the high resolution 9th-order weighted essentially non-oscillatory (W...
2017, 37(2): 237-242.
doi: 10.11883/1001-1455(2017)02-0237-06
Abstract:
In the present work, to find out the differences in composition and the regularities in space-time distribution for coal dust residues, we carried out a coal dust explosion experiment using a horizontal pipe and analyzed the gas and solid residues of...
In the present work, to find out the differences in composition and the regularities in space-time distribution for coal dust residues, we carried out a coal dust explosion experiment using a horizontal pipe and analyzed the gas and solid residues of...
2017, 37(2): 243-248.
doi: 10.11883/1001-1455(2017)02-0243-06
Abstract:
In the present work, we developed a novel method combining the forward Lagrange method and the transfer function method to process the data of ramp wave compression experiments. Compared with traditional methods, this method is more suitable to proce...
In the present work, we developed a novel method combining the forward Lagrange method and the transfer function method to process the data of ramp wave compression experiments. Compared with traditional methods, this method is more suitable to proce...
2017, 37(2): 249-254.
doi: 10.11883/1001-1455(2017)02-0249-06
Abstract:
The characteristic dimension of the explosion-generated cavity in the soil is the most important influence factor for the feature of the far field seismic wave. In this paper we established a quasi-static model to predict the characteristic dimension...
The characteristic dimension of the explosion-generated cavity in the soil is the most important influence factor for the feature of the far field seismic wave. In this paper we established a quasi-static model to predict the characteristic dimension...
2017, 37(2): 255-261.
doi: 10.11883/1001-1455(2017)02-0255-07
Abstract:
To accurately characterize such important characteristics as the peak velocity and the energy distribution in different frequency ranges of the blast vibration signal, this signal's trend after the time integral has to be removed. In this paper, the ...
To accurately characterize such important characteristics as the peak velocity and the energy distribution in different frequency ranges of the blast vibration signal, this signal's trend after the time integral has to be removed. In this paper, the ...
2017, 37(2): 262-268.
doi: 10.11883/1001-1455(2017)02-0262-07
Abstract:
The digital-laser dynamic caustics system in combination with a static-dynamic loading device was utilized in the blasting fracturing test, in which the PMMA specimens underwent four kinds of vertical static stresses (0, 3, 6 and 9 MPa, respectively)...
The digital-laser dynamic caustics system in combination with a static-dynamic loading device was utilized in the blasting fracturing test, in which the PMMA specimens underwent four kinds of vertical static stresses (0, 3, 6 and 9 MPa, respectively)...
2017, 37(2): 269-273.
doi: 10.11883/1001-1455(2017)02-0269-05
Abstract:
A two-stage model is proposed herein to predict the through-thickness cone cracking of a reinforced concrete slab struck transversely by a flat-ended projectile at relatively low velocities. The first stage is penetration, in which the resistive pres...
A two-stage model is proposed herein to predict the through-thickness cone cracking of a reinforced concrete slab struck transversely by a flat-ended projectile at relatively low velocities. The first stage is penetration, in which the resistive pres...
2017, 37(2): 274-282.
doi: 10.11883/1001-1455(2017)02-0274-09
Abstract:
In this paper, the auto-ignition mechanism in the gaseous detonation propagation of the stoichiometric H2-air detonable mixture in a straight tube was numerically studied using an overall one-step chemical reaction model and a detailed chemical react...
In this paper, the auto-ignition mechanism in the gaseous detonation propagation of the stoichiometric H2-air detonable mixture in a straight tube was numerically studied using an overall one-step chemical reaction model and a detailed chemical react...
2017, 37(2): 283-290.
doi: 10.11883/1001-1455(2017)02-0283-08
Abstract:
To improve the design of the underwater multi-layered protective bulkhead structure, we carried out several simulations to investigate the characteristics of the damaging load on the void cabin with a multi-layered protective bulkhead subjected to un...
To improve the design of the underwater multi-layered protective bulkhead structure, we carried out several simulations to investigate the characteristics of the damaging load on the void cabin with a multi-layered protective bulkhead subjected to un...
2017, 37(2): 291-298.
doi: 10.11883/1001-1455(2017)02-0291-08
Abstract:
In the present work, to find out how the inert core's physical properties influence the detonation driving of the axial scalar hollow charge, we fabricated three warheads separately stuffed with air, nylon 1011 and aluminum 12, carried out a static e...
In the present work, to find out how the inert core's physical properties influence the detonation driving of the axial scalar hollow charge, we fabricated three warheads separately stuffed with air, nylon 1011 and aluminum 12, carried out a static e...
2017, 37(2): 299-306.
doi: 10.11883/1001-1455(2017)02-0299-08
Abstract:
As a thin-walled structure with a very high content of reinforcement, a viaduct box girder is hard to break using the drilling-style blasting. In this paper, based on the demolition project of Zhuan Yang Viaduct in Wuhan, a blasting plan using the wa...
As a thin-walled structure with a very high content of reinforcement, a viaduct box girder is hard to break using the drilling-style blasting. In this paper, based on the demolition project of Zhuan Yang Viaduct in Wuhan, a blasting plan using the wa...
2017, 37(2): 307-314.
doi: 10.11883/1001-1455(2017)02-0307-08
Abstract:
Based on the structural features of the railgun and the theories of impact thermodynamics, a 3D gouging model containing a micro particle was established using the material point method to simulate the formation process of the rail gouging, and the g...
Based on the structural features of the railgun and the theories of impact thermodynamics, a 3D gouging model containing a micro particle was established using the material point method to simulate the formation process of the rail gouging, and the g...
2017, 37(2): 315-322.
doi: 10.11883/1001-1455(2017)02-0315-08
Abstract:
In order to investigate the dynamic fracture mechanics behavior and damage morphology of C/SiC ceramic matrix composites, dynamic splitting tensile tests on the C/SiC composites with three different volume fractions of short carbon fiber (16.0%, 21.0...
In order to investigate the dynamic fracture mechanics behavior and damage morphology of C/SiC ceramic matrix composites, dynamic splitting tensile tests on the C/SiC composites with three different volume fractions of short carbon fiber (16.0%, 21.0...
2017, 37(2): 323-331.
doi: 10.11883/1001-1455(2017)02-0323-09
Abstract:
To investigate the effects of a T-shaped branch structure on the overpressures during the explosions of the gasoline-air mixture in a pipe, we conducted multiple parameter contrast experiments under the conditions of different initial gasoline vaper ...
To investigate the effects of a T-shaped branch structure on the overpressures during the explosions of the gasoline-air mixture in a pipe, we conducted multiple parameter contrast experiments under the conditions of different initial gasoline vaper ...
2017, 37(2): 332-338.
doi: 10.11883/1001-1455(2017)02-0332-07
Abstract:
Based on the finite element method, the heat conduction equation was made discrete and written as the heat transfer computation code which was then embedded into the existing impact dynamics program. The new program was applied to the numerical analy...
Based on the finite element method, the heat conduction equation was made discrete and written as the heat transfer computation code which was then embedded into the existing impact dynamics program. The new program was applied to the numerical analy...
2017, 37(2): 339-346.
doi: 10.11883/1001-1455(2017)02-0339-08
Abstract:
The mechanical and chemical response of explosives under low velocity impact is the basis for the evaluation of their sensitivity. The drop-weight impact apparatus equipped with the optical photography was used to achieve a frequency of 150 thousand ...
The mechanical and chemical response of explosives under low velocity impact is the basis for the evaluation of their sensitivity. The drop-weight impact apparatus equipped with the optical photography was used to achieve a frequency of 150 thousand ...
2017, 37(2): 347-352.
doi: 10.11883/1001-1455(2017)02-0347-06
Abstract:
By considering the under-expanded jet flow from nozzle exit, the integral form Euler equations for unsteady compressible flow in the Lagrange coordinates of a moving control volume was developed. By using three-order essentially non-oscillatory (ENO)...
By considering the under-expanded jet flow from nozzle exit, the integral form Euler equations for unsteady compressible flow in the Lagrange coordinates of a moving control volume was developed. By using three-order essentially non-oscillatory (ENO)...
2017, 37(2): 353-364.
doi: 10.11883/1001-1455(2017)02-0353-12
Abstract:
An experimental system and numerical model were set up to investigate ethylene-air premix deflagration flame propagation and quenching by crimped-ribbon flame arresters in a horizontal pipe, closed at both ends. The deflagration suppression experimen...
An experimental system and numerical model were set up to investigate ethylene-air premix deflagration flame propagation and quenching by crimped-ribbon flame arresters in a horizontal pipe, closed at both ends. The deflagration suppression experimen...
2017, 37(2): 365-376.
doi: 10.11883/1001-1455(2017)02-0365-12
Abstract:
Based on several key issues of the elastic-plastic constitutive model, the equation of state and strength criterion, and the calculation of the strength of concrete under blast and impact loading were reviewed. Concrete being viewed as a binary mater...
Based on several key issues of the elastic-plastic constitutive model, the equation of state and strength criterion, and the calculation of the strength of concrete under blast and impact loading were reviewed. Concrete being viewed as a binary mater...
