Transient effects during rapid crack propagation

An analysis is described for rapid crack propagation in an axially loaded s trip and for a driven wedge. Each has a dynamic steady state, but this is u sually not achieved because the initial boundary conditions of crack length and speed are violated. It is shown that the induced transient behaviour m ay be described using a perturbation analysis. In the strip case there is a nonlinear oscillating solution, while for the wedge a damped harmonic moti on results.