Bulk sound velocity of porous materials at high pressures

doi:10.1088/1009-1963/11/11/317

中国物理B ›› 2002, Vol. 11 ›› Issue (11): 1188-1192.doi: 10.1088/1009-1963/11/11/317

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇下一篇

Bulk sound velocity of porous materials at high pressures

耿华运, 吴强, 谭华, 蔡灵仓, 经福谦

Laboratory for Shock Wave and Detonation Physics Research, Southwest Institute of Fluid Physics, PO Box 919-102, Mianyang 621900, China

收稿日期:2002-03-27 修回日期:2002-07-01 出版日期:2005-06-12 发布日期:2005-06-12
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No 19804010) and by the Science and Technology Foundation of China Academy of Engineering Physics (Grant No 980102).

Bulk sound velocity of porous materials at high pressures

Geng Hua-Yun (耿华运), Wu Qiang (吴强), Tan Hua (谭华), Cai Ling-Cang (蔡灵仓), Jing Fu-Qian (经福谦)

Laboratory for Shock Wave and Detonation Physics Research, Southwest Institute of Fluid Physics, PO Box 919-102, Mianyang 621900, China

Received:2002-03-27 Revised:2002-07-01 Online:2005-06-12 Published:2005-06-12
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No 19804010) and by the Science and Technology Foundation of China Academy of Engineering Physics (Grant No 980102).

摘要/Abstract

摘要： A correction of Walsh's method for bulk sound velocity calculation for shocked porous materials is accomplished based on the Wu－Jing thermodynamic equation of state. The corrected bulk velocities for solid and porous samples with low porosities are in good agreement with the corresponding experimental data published previously. On the basis of this corrected equation, the influence of thermoelectrons on the bulk velocity of shocked materials is discussed in detail at pressures of 50, 70 and 200 GPa. Some interesting phenomena are revealed, which seem to be the unique features of a dynamic-pressure-loading process and could not be found in static experiments.

Abstract: A correction of Walsh's method for bulk sound velocity calculation for shocked porous materials is accomplished based on the Wu－Jing thermodynamic equation of state. The corrected bulk velocities for solid and porous samples with low porosities are in good agreement with the corresponding experimental data published previously. On the basis of this corrected equation, the influence of thermoelectrons on the bulk velocity of shocked materials is discussed in detail at pressures of 50, 70 and 200 GPa. Some interesting phenomena are revealed, which seem to be the unique features of a dynamic-pressure-loading process and could not be found in static experiments.

Key words: porous materials, high pressure, sound velocity, shock wave

中图分类号: (Acoustical properties of solids)

62.65.+k

耿华运, 吴强, 谭华, 蔡灵仓, 经福谦. Bulk sound velocity of porous materials at high pressures[J]. 中国物理B, 2002, 11(11): 1188-1192.

Geng Hua-Yun (耿华运), Wu Qiang (吴强), Tan Hua (谭华), Cai Ling-Cang (蔡灵仓), Jing Fu-Qian (经福谦). Bulk sound velocity of porous materials at high pressures[J]. Chinese Physics, 2002, 11(11): 1188-1192.

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Bulk sound velocity of porous materials at high pressures

Bulk sound velocity of porous materials at high pressures

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