Abstract
The weight function technique is used to analyse both static and dynamic three-dimensional fracture mechanics problems. The weight functions are first determined, in terms of Laplace transforms, by an indirect boundary element method. The stress intensity factor in the time domain is then obtained by Durbin's inversion method. The dynamic stress intensity factors are calculated for a central square crack in a square bar and a circular or elliptical crack in a cylinder under different types of loads. An extension of the method for arbitrary dynamic loads is developed via a dynamic Green's function approach.
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