Limit Loads for Piping Branch Junctions with Local Wall-thinning under Internal Pressure and In-plane Bending

감육이 존재하고 내압과 굽힘하중의 복합하중을 받는 T 분기관의 한계하중

This paper presents plastic limit loads of piping branch junctions with local wall thinning under combined pressure and in-plane bending, based on systematic three-dimensional finite element limit analyses using elastic-perfectly plastic materials. An ideal branch junction without weld or reinforcement around the intersection is considered with two locations of wall thinning; one in the run pipe, and the other in the branch pipe. Based on FE results, effects of thinning geometries on plastic limit moments are quantified and simple approximations of plastic limit loads are proposed.