ACOUSTIC-WAVE GENERATION IN AN ANISOTROPI C MEDIUM USING A LASER-BEAM

The Lamb's problem for an elastic anisotropic and homogeneous half spa ce is solved. The source is linear and contains in the free surface of this half space. A numerical calculation based on the Cagniard de Hoo p 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 directio ns of this line source. This theoretical study may be applied to the g eneration of acoustic waves when using a laser beam focused by a cylin drical lens on a sample. The impact is then linear.