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- W2324620814 abstract "A longitudinal direction is one in which three pure modes can propagate. It is known that every medium has at least three longitudinal directions. Every axis of symmetry is such a “bound” longitudinal direction, but in most media there are additional “free” longitudinal directions which do not coincide with symmetry directions. In particular, there are longitudinal directions even in triclinic media that possess no symmetry except the point symmetry. The maximum number of distinct longitudinal directions is thirteen. In a longitudinal direction the wave propagation is particularly simple: for the longitudinal mode, wave normal, displacement direction, and ray direction are identical, while for the two transverse modes the deviation of the ray direction from that of the wave normal depends on the type of longitudinal direction and the relative magnitude of a few stiffnesses expressed in a coordinate system aligned with the longitudinal direction. Similarly, the polarization pattern in the vicinity of a lon..." @default.
- W2324620814 created "2016-06-24" @default.
- W2324620814 creator A5027408749 @default.
- W2324620814 date "1991-01-01" @default.
- W2324620814 modified "2023-09-24" @default.
- W2324620814 title "Longitudinal directions in media of arbitrary anisotropy" @default.
- W2324620814 cites W2055683453 @default.
- W2324620814 doi "https://doi.org/10.1190/1.1888995" @default.
- W2324620814 hasPublicationYear "1991" @default.
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