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Effect of irreversible phase change on shock-wave propagation

Chen, G. Q. and Ahrens, T. J. and Yang, W. and Knowles, J. K. (1999) Effect of irreversible phase change on shock-wave propagation. Journal of the Mechanics and Physics of Solids, 47 (4). pp. 763-783. ISSN 0022-5096. doi:10.1016/S0022-5096(98)00090-8.

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New release adiabat data for vitreous GeO_2 are reported up to ∼25 GPa using the VISAR technique. Numerical modeling of isentropic release wave induced dynamic states achieved from one dimensional strain–stress waves is consistent with a phase change that induce an increase in zero-pressure density from 3.7–6.3 Mg/m^3 starting at ∼8 GPa. The first release adiabat data for SiO_2 ( fused quartz) are presented (obtained with immersed foil technique) . Above 10 GPa, the SiO_2 release isentropes, in analogy with GeO_2, are steeper than the Hugoniot in the volume-pressure space, indicating the presence of an irreversible phase transition (to a stishovite-like phase). We simulate propagation of shock-waves in GeO_2, in spherical and planar symmetries, and predict enhanced attenuation for shock pressures ( p) above the phase change initiation pressure (8 GPa) . The pressure from a spherical source decays with propagation radius r, p ∼ r^x, where x is the decay coefficient. Modeling hysteresis of the phase change gives x = −2.71, whereas without the phase change, x = −1.15. An analytical model is also given.

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Additional Information:© 1999 Elsevier Science Ltd. Received 14 May 1997; in revised form 21 July 1998. This material is based upon work supported by, or in part by, the U.S. Army Research Office under Contract/Grant No. DAAH04-94-G0063. Contribution No. 5780, Division of Geological and Planetary Sciences, California Institute of Technology.
Funding AgencyGrant Number
Army Research Office (ARO)DAAH04-94-G0063
Subject Keywords:phase transformation; constitutive behavior; biological material; polycrystalline material; porous material; rock; stress waves; optical interferometry
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Caltech Division of Geological and Planetary Sciences5780
Issue or Number:4
Record Number:CaltechAUTHORS:20141021-124357929
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Official Citation:Chen, G. Q., Ahrens, T. J., Yang, W., & Knowles, J. K. (1999). Effect of irreversible phase change on shock-wave propagation. Journal of the Mechanics and Physics of Solids, 47(4), 763-783. doi:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:50619
Deposited On:21 Oct 2014 22:21
Last Modified:10 Nov 2021 18:58

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