内圧を受ける有限肉厚円筒の内面に存在する半だ円表面き裂の応力拡大係数 : 第1報、解析手法  [in Japanese] Stress Intensity Factors for an Internal Semi-Elliptical Surface Crack in Cylindrical Pressure Vessels : 1st Report, Method of Analysis  [in Japanese]

In this paper, the surface crack problem in a cylinder subjected to internal pressure is solved. The analysis is based on the body force method, but it is different from the usual body force method in the following point. That is, the body forces to be continuously distributed on the imaginary cylindrical boundaries are approximated by some discrete point forces acting on the outside of the imaginary boundaries. By using this method combined with the resultant force boundary conditions, solutions with high accuracy can be easily obtained.