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Numerical simulation on two head-on colliding experiment of detonation waves based on smoothed particle hydrodynamics method

YANG Kun,WU Zihui,HU Xiaomian,PAN Hao(Beijing Institute of Applied Physics and Computational Mathematics,Beijing 100088,China)  
To analyze two head-on colliding experiment of detonation waves and the dynamics response of flyer plates made of different materials under two head-on colliding detonation waves,the Smoothed Particle Hydrodynamics(SPH) method is used to perform numerical simulation,which can analyze fracture and complex interface.The 2D axisymmetric SPH discrete form is used and B-spline function is selected as the smooth function.A 2D fluid dynamics program is used to perform numerical simulation.The numerical simulation results are consistent with the experiment results.So SPH method can qualitatively describe the discontinuous and non-dense state(i.e.scattered and atomized state,) of the protruding part in the two head-on colliding area of lead flyer plate.The numerical simulation indicates that,compared the flyer plate made of lead with the one made of tungsten,the degree of the protruding part in the two head-on colliding area of lead flyer plate is larger,which is due to the difference of the intension and compressibility of the two kinds of materials.
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