Abstract
The Laplace transformed boundary element method is used to analyse the transient responses of a three-dimensional crack. The choice of Laplace inversion parameters and the calculation of dynamic stress intensity factors (SIF) are discussed. In order to verify the computation procedure and choose the discretization format, the transient displacement response of a prismatical beam under various dynamic loadings and the transient SIF response of a thick plate with a through-thickness crack under two different discretization schemes are calculated. Finally, the transient SIF response of a plate with a semi-circular surface crack under several different loading conditions is also computed, and the results are shown to be quite good.
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