scholarly journals Smoothed particle hydrodynamics modeling of linear shaped charge with jet formation and penetration effects

2013 ◽  
Vol 86 ◽  
pp. 77-85 ◽  
Author(s):  
D.L. Feng ◽  
M.B. Liu ◽  
H.Q. Li ◽  
G.R. Liu
Keyword(s):  
Smoothed Particle Hydrodynamics ◽  
Shaped Charge ◽  
Jet Formation ◽  
Linear Shaped Charge ◽  
Particle Hydrodynamics ◽  
Smoothed Particle

scholarly journals Research on the Effect of Particle Distribution on the Crack Propagation in Shaped Energy Blasting Based on the Smoothed Particle Hydrodynamics

2020 ◽  
Vol 2020 ◽  
pp. 1-14
Author(s):  
Pengfei Guo ◽  
Xiaohu Zhang ◽  
Weisheng Du ◽  
Xiaochun Xiao ◽  
Dingjie Sun
Keyword(s):  
Smoothed Particle Hydrodynamics ◽  
Particle Distribution ◽  
Shaped Charge ◽  
Uneven Distribution ◽  
Adaptive Optimization ◽  
Sph Method ◽  
Particle Hydrodynamics ◽  
Smoothed Particle ◽  
Particle Configuration ◽  
Self Adaptive

Conventional smoothed particle hydrodynamics (SPH) methods suffer from disadvantages, such as difficult initial particle configuration, uneven distribution of generated particles, and low computational efficiency when applied to numerical simulation of shaped charge blasting. In this research, to overcome these problems, a modified SPH method that generates the particle configuration through self-adaptive optimization is developed by the combined application of MATLAB and LS-DYNA. The results presented in this paper demonstrate that the modified configuration method solves the problem of uneven distribution of particles in complex geometry domains by providing a more uniform smoothed particle distribution than the conventional SPH method. Furthermore, the results from the application of these two methods to the bidirectional-shaped charge blasting problem reveal that the defects in the particle configuration in the conventional SPH method lead to the development of main cracks in both the shaped and the unshaped directions. However, with the self-adaptive optimization method, the main cracks develop only in the shaped direction. In addition, the equivalent stress difference between the shaped and unshaped directions, 0.7 ms after detonation, is 120 MPa with the modified method. This is 85 MPa more than that with the conventional method.

Numerical Simulation of Shaped Charges Using the SPH Solver: Jet Formation and Target Penetration

2007 ◽  
Vol 566 ◽  
pp. 65-70 ◽  
Author(s):  
Hitoshi Miyoshi
Keyword(s):  
Numerical Simulation ◽  
Accurate Solution ◽  
Shaped Charge ◽  
Phase Changes ◽  
Jet Formation ◽  
Sph Method ◽  
Liner Material ◽  
Particle Hydrodynamics ◽  
Smoothed Particle ◽  
Euler Solver

The SPH (Smoothed Particle Hydrodynamics) solver of the AUTODYN-3D was utilized to demonstrate a remarkable numerical simulation of shaped charges, specifically the process of jet formation and target penetration. A shaped charge consists of an explosive, a case and a conical liner. The Euler solver has been generally utilized for the simulation of the liner collapse process. Though the axi-symmetric modeling of the liner usually is selected, the actual jet formation process is never so idealistic. When we choose options consistent with live fire experiments, the SPH solver produces a more accurate solution over the Euler approach. The SPH method is capable of dealing with problems, including the free surface, deformable boundaries, moving interface and extremely large deformation. Calculated hypervelocity particles using the SPH method precisely represented the actual observed jet formation profiles of shaped charge characteristics. Accurate representations of the jet velocities, a velocity gradient with the tip traveling much faster than the trail and phase changes of the liner material were demonstrated. Using the calculated jet particles from the SPH method, the penetration process was simulated. The calculation was very time-consuming and the results did not conform to the traditional theories of the penetration. We have been investigating this discrepancy.

Simulation de l'écoulement au cours du procédé de rotomoulage par la méthode Smoothed Particle Hydrodynamics (SPH)

2008 ◽  
Vol 96 (6) ◽  
pp. 263-268 ◽  
Author(s):  
E. Mounif ◽  
V. Bellenger ◽  
A. Ammar ◽  
R. Ata ◽  
P. Mazabraud ◽  
...  
Keyword(s):  
Smoothed Particle Hydrodynamics ◽  
Particle Hydrodynamics ◽  
Smoothed Particle
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