The Behaviour of Elastic Surface Waves Polarized in a Plane of Material Symmetry II. Monoclinic Media
Abstract
A general analysis has been given in part I of symmetric elastic surface waves, characterized by the coincidence of the reference plane with a plane of material symmetry. There follows here a detailed account of the propagation of such waves in media with monoclinic, the minimum type of symmetry. The three definite integrals involved in the determination of the surfacewave function, and hence the speed of propagation, are evaluated and an explicit formula is obtained connecting a fourth integral, also required in the calculation of surfacewave properties, to the other three. Illustrative numerical results are presented, referring in all to 12 monoclinic crystals. The continuous transitions between subsonic and supersonic surfacewave propagation, encountered previously in cubic and transversely isotropic elastic media, occur in seven of the materials and thus emerge as a customary feature of symmetric surface waves. Computations of the associated displacement and traction fields and the paths of particles in the boundary of the transmitting body are also described.
 Publication:

Proceedings of the Royal Society of London Series A
 Pub Date:
 July 1992
 DOI:
 10.1098/rspa.1992.0103
 Bibcode:
 1992RSPSA.438..207C