Weight functions for circular cracks

The authors examined a problem for a linearly elastic solid containing internal or external circular normal separation crack. It is shown that the corresponding weight function is equal to the product of the axisymmetric weight function and Poisson's kernel. An approximate weight function for an internal circular crack in an unlimited cylinder is constructed as an example.Translated from Problemy Prochnosti, No. 12, pp. 25–28, December, 1990.