Abstract
In order to simulate three-dimensional dynamic crack propagation, a three-dimensional moving finite-element method was developed. A new expression was also derived for the dynamic J integral (J') in terms of the equivalent domain integral (EDI) method. The moving finite-element procedure together with the dynamic J integral evaluation procedure made it possible to evaluate the distribution of the dynamic energy release rate along the propagating crack front at each time step. Furthermore, a new formula for converting the dynamic J integral to the stress intensity factor along the crack front was derived by introducing a three-dimensionality parameter. Numerical simulation was carried out for several sample problems.
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