Abstract
A two-dimensional isotropic solid which is infinite in extent is given a static homogeneous deformation. A point perturbing body force is then superposed on this finite deformation causing anisotropic elastic waves to spread outward from the origin. The solid is characterized by three parameters which depend on the material properties and the initial deformation. When these parameters are suitably restricted, double points appear on the normal curve. For this situation the shape of the expanding wave front together with expressions for the displacement components behind the front are given. It is found that the wave front does not contain lids.
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