A method of estimating the direct stress concentration round holes in reinforced sheet

Abstract

It was shown in Aeronautical Research Council Report No. 5455 that the accurate stress-function solution of certain two-dimensional problems of stress distribution may be replaced, with negligible error, by the approximate stringer-sheet solution (R. & M. Nos. 2099, 2100). This report extends the comparison of the two methods to problems of stress concentration near holes. The stringer-sheet solution is not as accurate as before but the error in the direct stress is sufficiently low for the method to be of practical use. It is proposed to apply the method to rectangular holes and to the problem of a hole reinforced at its edge.