Numerical simulation on high speed impact behavior of Al-W and Al-Ni mixture

Kyungsun Chung, Hyoungjoon Kwon, Jung Su Park, Soonho Song

Research output: Contribution to journalArticle

Abstract

Multi-functional energetic structural material (MESM) is a mixture of metals, metal oxides and binders, which improves the insensitivity and maintains explosion power of the explosives. MESM during explosion reaction undergoes various changes in thermal, mechanical, and chemical characteristics caused by shock wave propagation in time scale of nanoseconds. It is hard to study impact characteristics of MESM through various experiments due to short impact reaction, high cost and safety problem. Therefore, analysis using mesoscale simulation is important in studying impact characteristics such as Hugoniot relation and pressure data. In this study, meso-scale simulations of shock wave propagation were conducted for Al, Ni, W, Al-W and Al-Ni mixture, under the conditions of impact velocities ranging from 0.5 km/s to 5 km/s. Simulation data of Al, W and Ni using Mie-Gruneisen EOS were used to confirm the accuracy of analysis, and the results correlated reasonably well with the corresponding data (Los Alamos explosive experiment). Based on this single metal simulation results, simulations for Al-W and Al-Ni mixture were performed at various volume fractions and propagation distances of shock. The results of these simulations could be useful information to predict impact characteristics of mixtures.

Original languageEnglish
Pages (from-to)4629-4636
Number of pages8
JournalJournal of Mechanical Science and Technology
Volume32
Issue number10
DOIs
Publication statusPublished - 2018 Oct 1

Fingerprint

Computer simulation
Shock waves
Wave propagation
Explosions
Metals
Binders
Volume fraction
Experiments
Oxides
Costs
Hot Temperature

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Chung, Kyungsun ; Kwon, Hyoungjoon ; Park, Jung Su ; Song, Soonho. / Numerical simulation on high speed impact behavior of Al-W and Al-Ni mixture. In: Journal of Mechanical Science and Technology. 2018 ; Vol. 32, No. 10. pp. 4629-4636.
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Numerical simulation on high speed impact behavior of Al-W and Al-Ni mixture. / Chung, Kyungsun; Kwon, Hyoungjoon; Park, Jung Su; Song, Soonho.

In: Journal of Mechanical Science and Technology, Vol. 32, No. 10, 01.10.2018, p. 4629-4636.

Research output: Contribution to journalArticle

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