Approximate closed form weight function for an elliptical crack in an infinite body

It has been reported in the literature that there exist a number of approximate closed-form weight functions for elliptical crack in an infinite body. The general procedure for refining them by Rice's integral formula is suggested. The tentative formula obtained in this way is numerically verified by a carefully elaborated procedure. For uniform loading, the accuracy of suggested formula lies within 6 percent of the strict solution. The practical use of the formula in the point weight function method for semi-elliptical crack is demonstrated. (Author)