2007 Vol. 27, No. 6
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2007, 27(6): 481-486.
doi: 10.11883/1001-1455(2007)06-0481-06
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Abstract:
A phenomenological model, including nonlinear elasticity (equation of state), rate-dependent plasticity, and void nucleation and growth, was proposed to simulate deformations of U-6%Nb alloy under the condition of high strain rate. The diagonally imp...
A phenomenological model, including nonlinear elasticity (equation of state), rate-dependent plasticity, and void nucleation and growth, was proposed to simulate deformations of U-6%Nb alloy under the condition of high strain rate. The diagonally imp...
2007, 27(6): 487-482.
doi: 10.11883/1001-1455(2007)06-0487-06
Abstract:
A test tube is designed to experimentally evaluate the accidental explosion of a H2-He heat exchanger in a nuclear reactor when hydrogen leaks during work. The test tube is identical to the exchanger in size and geometry. In the experiments, H2-air...
A test tube is designed to experimentally evaluate the accidental explosion of a H2-He heat exchanger in a nuclear reactor when hydrogen leaks during work. The test tube is identical to the exchanger in size and geometry. In the experiments, H2-air...
2007, 27(6): 493-500.
doi: 10.11883/1001-1455(2007)06-0493-08
Abstract:
The problem of asymmetric jet formation during the two-flow collision is theoretically unsolved yet, owing to steady solutions indeterminacy. Starting with special jets, we analyze the asymmetry between initial configuration of two incoming streams a...
The problem of asymmetric jet formation during the two-flow collision is theoretically unsolved yet, owing to steady solutions indeterminacy. Starting with special jets, we analyze the asymmetry between initial configuration of two incoming streams a...
2007, 27(6): 501-508.
doi: 10.11883/1001-1455(2007)06-0501-08
Abstract:
A generalized extension for the close condition of equations, which is satisfied with asymmetrical jet formation problem, is developed from head-on collision to asymmetrical oblique collision between two incoming streams. The geometrical theory of 2D...
A generalized extension for the close condition of equations, which is satisfied with asymmetrical jet formation problem, is developed from head-on collision to asymmetrical oblique collision between two incoming streams. The geometrical theory of 2D...
2007, 27(6): 509-514.
doi: 10.11883/1001-1455(2007)06-0509-06
Abstract:
The dynamic pre-buckling of finite cylindrical shells was discussed under both axial impact and internal or external pressure. A Hamiltonian system was constructed for the fundamental problem of the dynamic buckling, thereby problems of critical load...
The dynamic pre-buckling of finite cylindrical shells was discussed under both axial impact and internal or external pressure. A Hamiltonian system was constructed for the fundamental problem of the dynamic buckling, thereby problems of critical load...
2007, 27(6): 515-521.
doi: 10.11883/1001-1455(2007)06-0515-07
Abstract:
By using a splitting technique, the flux of the Navier Stokes governing equations including heat exchange and viscosity are divided into three parts, so called inviscid flux, viscous flux and heat flux, to calculate. The inviscid part of flux is eval...
By using a splitting technique, the flux of the Navier Stokes governing equations including heat exchange and viscosity are divided into three parts, so called inviscid flux, viscous flux and heat flux, to calculate. The inviscid part of flux is eval...
2007, 27(6): 522-528.
doi: 10.11883/1001-1455(2007)06-0522-07
Abstract:
This paper gives a brief description of smoothed particle hydrodynamics (SPH) method. By taking the advantages of SPH and standard finite element methods, a coupled method is proposed, in which the computational model is made up of finite elements in...
This paper gives a brief description of smoothed particle hydrodynamics (SPH) method. By taking the advantages of SPH and standard finite element methods, a coupled method is proposed, in which the computational model is made up of finite elements in...
2007, 27(6): 529-534.
doi: 10.11883/1001-1455(2007)06-0529-06
Abstract:
Dynamic and static resistances as well as resistance of steel bar to projectile when projectile colliding with steel bar are taken into consideration in the proposed engineering analytical model. Penetration depth and displacement, deceleration, velo...
Dynamic and static resistances as well as resistance of steel bar to projectile when projectile colliding with steel bar are taken into consideration in the proposed engineering analytical model. Penetration depth and displacement, deceleration, velo...
2007, 27(6): 535-540.
doi: 10.11883/1001-1455(2007)06-0535-06
Abstract:
Numerical simulation of the flow field of multi-cycle pulse detonation engine (PDE) is helpful for understanding the engine principle and performance analysis, and can provide the useful information for PDE design. The reactive Euler equations and a ...
Numerical simulation of the flow field of multi-cycle pulse detonation engine (PDE) is helpful for understanding the engine principle and performance analysis, and can provide the useful information for PDE design. The reactive Euler equations and a ...
2007, 27(6): 541-545.
doi: 10.11883/1001-1455(2007)06-0541-05
Abstract:
Dynamic compressive behaviors of carbon cloth /carbon composites were experimentally studied at the strain rates of 500, 1 500 s-1 by the split Hopkinson pressure bar with pulse shaper. Experimental results show that the pulse shaping technique ensur...
Dynamic compressive behaviors of carbon cloth /carbon composites were experimentally studied at the strain rates of 500, 1 500 s-1 by the split Hopkinson pressure bar with pulse shaper. Experimental results show that the pulse shaping technique ensur...
2007, 27(6): 546-552.
doi: 10.11883/1001-1455(2007)06-0546-07
Abstract:
Based on the equations for the conservation of mass, momentum, and energy together with the theory of plane shock wave and thermodynamics, a debris cloud model was proposed to characterize the debris cloud produced by normal impact of spherical proje...
Based on the equations for the conservation of mass, momentum, and energy together with the theory of plane shock wave and thermodynamics, a debris cloud model was proposed to characterize the debris cloud produced by normal impact of spherical proje...
Study on theory and method of reliability assessment of explosive initiator based on testing entropy
2007, 27(6): 553-556.
doi: 10.11883/1001-1455(2007)06-0553-04
Abstract:
To decrease testing samples and avoid the risk caused by estimated error of scale factor , a new statistical method was introduced in the tests on reliability assessment of explosive initiator. The concept of entropy was presented and the equation of...
To decrease testing samples and avoid the risk caused by estimated error of scale factor , a new statistical method was introduced in the tests on reliability assessment of explosive initiator. The concept of entropy was presented and the equation of...
2007, 27(6): 557-561.
doi: 10.11883/1001-1455(2007)06-0557-05
Abstract:
Considering the quantum-mechanical effect at lower temperatures, the modified Weeks-Chandler-Andersen theory and improved variational perturbation principle were used to develop the single and double shock dynamic equations of state of liquid helium ...
Considering the quantum-mechanical effect at lower temperatures, the modified Weeks-Chandler-Andersen theory and improved variational perturbation principle were used to develop the single and double shock dynamic equations of state of liquid helium ...
2007, 27(6): 562-566.
doi: 10.11883/1001-1455(2007)06-0562-05
Abstract:
By adopting wedge-shaped charge and using critical thickness to characterize detonation waves propagation, a experimental study was carried out to explore influences of particle size of HMX on detonation waves propagation of HMX and HMX/F2641 at the ...
By adopting wedge-shaped charge and using critical thickness to characterize detonation waves propagation, a experimental study was carried out to explore influences of particle size of HMX on detonation waves propagation of HMX and HMX/F2641 at the ...
2007, 27(6): 567-571.
doi: 10.11883/1001-1455(2007)06-0567-05
Abstract:
Deflagration-to-detonation transition (DDT) of composition B (TNT/RDX=40/60) with density 1.597 g/cm3 is experimentally explored by using the electrical pin and pressure sensor measurement techniques. Experimental results show that a DDT is obtained ...
Deflagration-to-detonation transition (DDT) of composition B (TNT/RDX=40/60) with density 1.597 g/cm3 is experimentally explored by using the electrical pin and pressure sensor measurement techniques. Experimental results show that a DDT is obtained ...
2007, 27(6): 572-576.
doi: 10.11883/1001-1455(2007)06-0572-05
Abstract:
Base on aerodynamics and related rocket engine theories, two types of dual-rail sleds were designed and experimentally tested on a 600 m long non-gap sled rail. Velocities of sled were measured by using the three methods of magnetic induction, laser ...
Base on aerodynamics and related rocket engine theories, two types of dual-rail sleds were designed and experimentally tested on a 600 m long non-gap sled rail. Velocities of sled were measured by using the three methods of magnetic induction, laser ...
