3rd French conference on acoustics
J. Phys. IV France 04 (1994) C5-749-C5-752
Génération d'ondes acoustiques dans un milieu anisotrope par impact laserA. MOURAD1, M. DESCHAMPS1 and B. CASTAGNÈDE2
1 Laboratoire de Mécanique Physique, Université Bordeaux I, 33405 Talence, France
2 Laboratoire d'Acoustique de l'Université du Maine, Av. Olivier Messiaen, BP. 535, 72017 Le Mans cedex, France
The Lamb's problem for an elastic, anisotropic and homogeneous half space is solved. The source is linear and contains in the free surface of this half space. A numerical calculation based on the Cagniard de Hoop method is performed, in the case of cubic symmetry. The free surface is parallel to a plane of symmetry. In addition, the line source may be parallel, or not, to an axis of symmetry. The displacement field is then calculated at any point of this half space, for various directions of this line source. This theoretical study may be applied to the generation of acoustic waves when using a laser beam focused by a cylindrical lens on a sample. The impact is then linear.
© EDP Sciences 1994