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Shock wave interactions with nano-structured materials: a molecular dynamics approach

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Abstract

Porous materials have long been known to be effective in blast mitigation strategies. Nano-structured materials appear to have an even greater potential for blast mitigation because of their high surface-to-volume ratio, a geometric factor which substantially attenuates shock wave propagation. A molecular dynamics approach was used to explore the effects of this remarkable property on the behavior of traveling shocks impacting on solid materials. The computational setup included a moving piston, a gas region, and a target solid wall with and without a porous structure. The materials involved were represented by realistic interaction potentials. The results indicate that the presence of a nano-porous material layer in front of the target wall reduced the stress magnitude and the energy deposited inside the solid by about 30 %, while at the same time substantially decreasing the loading rate.

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Authors and Affiliations

  1. Experimental Fluid Mechanics and Aerodynamics Laboratory, Department of Mechanical Engineering, The City College of New York/CUNY, New York, NY, 10031, USA

    A. K. Al-Qananwah & Y. Andreopoulos

  2. Levich Institute and Department of Physics, The City College of New York/CUNY, New York, NY, 10031, USA

    J. Koplik

Authors
  1. A. K. Al-Qananwah
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  2. J. Koplik
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  3. Y. Andreopoulos
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Correspondence to Y. Andreopoulos.

Additional information

Communicated by A. Hadjadj.

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Al-Qananwah, A.K., Koplik, J. & Andreopoulos, Y. Shock wave interactions with nano-structured materials: a molecular dynamics approach. Shock Waves 23, 69–80 (2013). https://doi.org/10.1007/s00193-012-0397-4

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  • DOI: https://doi.org/10.1007/s00193-012-0397-4

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