A transversely isotropic solid is at rest, and contains a semi-infinite, plane crack. The
axis of rotational material symmetry lies in the crack plane. Application of normal
point forces to each face of the crack causes transient 3D growth. The related
problem of discontinuities in displacement and traction that exist on regions that
exhibit dynamic similarity is first considered. Analytic results are obtained in integral
transform space. These lead to equations of the Wiener–Hopf type for the
fracture problem. Analytic solutions are again obtained and, upon inversion,
subjected to a dynamic energy release rate criterion that includes kinetic
energy. A particular form of rapid growth in time of the forces is found to
cause crack growth rates that indeed vary with position, but not with time.
The influence of anisotropy upon wave speeds and crack edge contour are
examined.
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