Shock wave studies of snow

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Shock-wave studies of snow have been conducted at stress levels of up to 40 MPa. Analysis of embedded gauges and shock-reverberation techniques were used to determine shock pressure-density data for snow with initial densities ranging from 100 kg m{sup {minus}3} to 520 kg m{sup {minus}3} and temperatures ranging from {minus}2{degrees}C to {minus}23{degrees}C. Shock velocities ranged from about 170 m s{sup {minus}1} (for low density snow) to about 280 m s{sup {minus}1} (for high density snow). At constant density and impact velocities, but varying temperatures, there was no variation in shock velocity. This indicates that the internal energy and any temperature ... continued below

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Pages: (5 p)

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Johnson, J.B.; Blaisdell, G.L.; Sturm, M.; Barrett, S.A. (Army Cold Regions Research and Engineering Lab., Hanover, NH (USA)); Brown, J.A. (Los Alamos National Lab., NM (USA)) & Gaffney, E.S. (Ktech Corp., Albuquerque, NM (USA)) January 1, 1991.

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Description

Shock-wave studies of snow have been conducted at stress levels of up to 40 MPa. Analysis of embedded gauges and shock-reverberation techniques were used to determine shock pressure-density data for snow with initial densities ranging from 100 kg m{sup {minus}3} to 520 kg m{sup {minus}3} and temperatures ranging from {minus}2{degrees}C to {minus}23{degrees}C. Shock velocities ranged from about 170 m s{sup {minus}1} (for low density snow) to about 280 m s{sup {minus}1} (for high density snow). At constant density and impact velocities, but varying temperatures, there was no variation in shock velocity. This indicates that the internal energy and any temperature dependent strength of ice bonds do not measurably affect shock propagation in snow over the temperature and pressure range of our tests. Our results also indicate that snow is a highly rate sensitive material. 9 refs., 4 figs.

Physical Description

Pages: (5 p)

Notes

OSTI; NTIS; GPO Dep.

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  • 1991 American Physical Society (APS) conference on shock compression of condensed matter, Williamsburg, VA (USA), 17-20 Jul 1991

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  • Other: DE91014753
  • Report No.: LA-UR-91-1951
  • Report No.: CONF-9107105--41
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 5681344
  • Archival Resource Key: ark:/67531/metadc1093541

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  • January 1, 1991

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  • Feb. 10, 2018, 10:06 p.m.

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Johnson, J.B.; Blaisdell, G.L.; Sturm, M.; Barrett, S.A. (Army Cold Regions Research and Engineering Lab., Hanover, NH (USA)); Brown, J.A. (Los Alamos National Lab., NM (USA)) & Gaffney, E.S. (Ktech Corp., Albuquerque, NM (USA)). Shock wave studies of snow, article, January 1, 1991; United States. (digital.library.unt.edu/ark:/67531/metadc1093541/: accessed April 24, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.