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Behaviour of Grüneisen Parameter at High Pressure and Temperature Inferred from Shock Compression Data |
| WU Qiang1;JING Fu-Qian1,2;LI Xin-Zhu1 |
| 1Laboratory for Shock Wave and Detonation Physics
Research, Institute of Fluid Physics, China Academy of Engineering Physics, P.O. Box 919, Mianyang 621900
2Institute of Physics, Southwest Jiaotong University, Chengdu 610031 |
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| Cite this article: |
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WU Qiang, JING Fu-Qian, LI Xin-Zhu 2002 Chin. Phys. Lett. 19 528-530 |
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Abstract A new method is proposed to calculate the Grüneisen parameter directly from the experimental Hugoniot data, without any assumption on the lattice vibrational mode of the material being studied. Compared with the results calculated by the methods proposed previously, the values of the Grüneisen parameter calculated have three distinguishable features that support the rationality of the method. A new phenomenon that the lattice vibrational mode changes with thermodynamic state of the solid has been first observed from the calculated results, which implies that the material parameter g, characterizing the lattice vibrational mode, is material dependent rather than a material constant.
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62.50.+p
64.30.+t
65.90.+i
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Published: 01 April 2002
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