Numerical Simulation of Shaped Charges Using the SPH Solver: Jet Formation and Target Penetration |
| Journal |
Materials Science Forum (Volume 566) |
| Volume |
Explosion, Shock Wave and Hypervelocity Phenomena |
| Edited by |
S. Itoh and K. Hokamoto |
| Pages |
65-70 |
| DOI |
10.4028/www.scientific.net/MSF.566.65 |
| Online since |
November, 2007 |
| Authors |
Hitoshi Miyoshi
|
| Keywords |
AUTODYN, Equation of State, Gurney Velocity, Shaped Charge, Strength Model |
| Abstract |
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. |
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