Determination of the Expansion Parameters for the Combined Welding and Expanding Connection of Tube-to-tubesheet
In this paper, numerical simulation for hydraulic expanding connection of tube to tubesheet was performed. Residual contact preesure on the contact surface between tube and tubesheet as well as residual expansion stress in the tubesheet were investigated. It is seen the distribution of residual contact pressure is not uniform. Instead, near the two tubesheet surfaces, there are two tightness bands on which the residual contact pressure is high. Based on the fact that residual expansion stress could be a driving force for the tubesheet cracking, it is suggested that the expansion pressure should not be too large but enough to completely form the tightness bands on the contact surface. With this criterion, expansion pressures for typical tube materals and size are given.
Expansion pressure Residual expansion stress Finite element analysis Tubesheet cracking
Huifang Li Caifu Qian Lan Wang
Beijing University of Chemical Technology, Beijing 100029,China Jinzhou Petro Chemical Company, Jinzhou 121001, China
国际会议
沈阳
英文
186-190
2010-07-28（万方平台首次上网日期，不代表论文的发表时间）