https://scholars.lib.ntu.edu.tw/handle/123456789/487133
標題: | Determination of surface wave velocities in a prestressed anisotropic solid | 作者: | Chai, J. F. Wu, T. T. TSUNG-TSONG WU |
關鍵字: | Acousto-elasticity; Scanning acoustic microscope; Surface wave | 公開日期: | 1996 | 卷: | 29 | 期: | 5 | 起(迄)頁: | 281-292 | 來源出版物: | Ndt & E International | 摘要: | In this paper, the velocities of surface waves propagating in a prestressed anisotropic crystal are determined both theoretically and experimentally. The Barnett-Lothe's integral formalism, which is fast and efficient in determining the surface wave velocities, is extended to solve the surface wave problem of a prestressed anisotropic material. The governing equations and boundary conditions of the wave superposed on a prestressed elastic body are derived by acousto-elasticity, and the effective wave propagating constants of the finite deformed body are determined. As the effective constants are determined and utilized to replace the elastic constants in the Barnett-Lothe's integral formalism, the surface wave velocities of the prestressed anisotropic body can be determined. In the experiment the surface wave velocity of a magnesium oxide (MgO) single crystal with (001) orientation under compressive stress is measured. A uniaxial compression in the [100] direction is applied to the crystal, and the corresponding phase velocities of the surface wave propagating on the (001) surface are measured by the V(z) curves of a line focused scanning acoustic microscope (SAM) with a frequency 1.0GHz. Copyright © 1996 Elsevier Science Ltd. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/487133 https://www.scopus.com/inward/record.uri?eid=2-s2.0-0030259753&doi=10.1016%2fs0963-8695%2896%2900031-x&partnerID=40&md5=d98ca9113ef88ba921676ba645368614 |
ISSN: | 0963-8695 | DOI: | 10.1016/S0963-8695(96)00031-X | SDG/關鍵字: | Acoustic microscopes; Acoustic properties; Anisotropy; Boundary conditions; Elasticity; Integral equations; Magnesia; Prestressed materials; Single crystals; Surface waves; Ultrasonic propagation; Ultrasonic waves; Acousto elasticity; Barnett-Lothe integral; Compressive stress; Prestressed anisotropic solid; Scanning acoustic microscope; Uniaxial compression; Ultrasonic velocity measurement |
顯示於: | 應用力學研究所 |
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