文献类型：会议论文

英文题名：ELASTIC STRESSES AND LIMIT BENDING MOMENTS OF CONCENTRIC AND ECCENTRIC REDUCERS SUBJECTED TO BENDING MOMENTS

作者：Chen, Sun-yi[1];Chen, Jin[2];Wang, Zhengdong[3];Wang, Chen[4]

机构：[1]Challenge Petrochem Machinery Corp Maoming, Maoming 525024, Guangdong, Peoples R China;[2]East China Univ Sci & Technol, Inst Pressure Vesture & Equipment, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, Key Lab Pressure Syst & Safety, MOE, Shanghai 200237, Peoples R China;[4]East China Univ Sci & Technol, Shanghai 200237, Peoples R China

会议论文集：ASME 2014 Pressure Vessels and Piping Conference (PVP-2014)

会议日期：JUL 20-24, 2014

会议地点：Anaheim, CA

语种：英文

摘要：In order to assess the safety of concentric reducers and eccentric reducers, the meridian stress and circumferential stress of the reducers subjected to in-plane bending moments are calculated based on the membrane theory. Solutions of limit bending moments are derived by using the approach with the equivalent stress and engineering coefficient. The solutions for both reducers are identical, as the formulas are composed of a base term multiplied by a bending moment coefficient. The limit bending moments are dominated by the small end of the reducers. The value of limit bending moment of the reducers is 14.6% more than that of a thin wall reducing elbow with same diameter and thickness when corresponding bending coefficient lambda>3.0. But comparison with a straight pipe which has the same diameter and thickness as the small end of the reducers, the limit bending moment of the reducers is 11.1% lower and the constant in the formula for the reducers is 3.6 instead of 4.0 for straight pipe. It could be dangerous to determine the limit bending moment of concentric reducers and eccentric reducers directly from the formula of limit bending moment for a thin wall pipe.