Modelling of fast jet formation under explosion collision of two-layer alumina/copper tubes

I Balagansky, A Vinogradov, L Merzhievsky

Abstract


Under explosion collapse of two-layer tubes with an outer layer of high-modulus ceramics and an inner layer of copper, formation of a fast and dense copper jet is plausible. We have performed a numerical simulation of the explosion collapse of a two-layer alumina/copper tube using ANSYS AUTODYN software. The simulation was performed in a 2D-axis symmetry posting on an Eulerian mesh of 3900x1200 cells. The simulation results indicate two separate stages of the tube collapse process: the nonstationary and the stationary stage. At the initial stage, a non-stationary fragmented jet is moving with the velocity of leading elements up to 30 km/s. The collapse velocity of the tube to the symmetry axis is about 2 km/s, and the pressure in the contact zone exceeds 700 GPa. During the stationary stage, a dense jet is forming with the velocity of 20 km/s. Temperature of the dense jet is about 2000 K, jet failure occurs when the value of effective plastic deformation reaches 30.


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DOI: http://dx.doi.org/10.21152/1750-9548.11.3.265

Copyright (c) 2017 I Balagansky, A Vinogradov, L Merzhievsky

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This work is licensed under a Creative Commons Attribution 4.0 International License.