Affiliation:
1. Beijing University of Chemical Technology
2. Guangdong University of Petrochemical Technoloty
3. Jinzhou Petrochemical Company
Abstract
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.
Publisher
Trans Tech Publications, Ltd.
Reference9 articles.
1. Yokell, S. Expanded, and welded- and -expanded tube-to-tubesheet Joints, ASME, J. Pres. Ves. Tech. 1992, 114(2) : 157-165.
2. Soler, A I, Hong, X. Analysis of tube-tubesheet joint loading lncluding thermal loading, ASME, J. Appl. Mech., 1984, 51(6): 339-344.
3. Kalnins, A, Updike, D P, and Caldwell, S M. Contact pressure in rolled tube-tubesheet Joints. Tansaction of the 10 th International Conference on Structural Mechanics in Reactor Technolog. 1989, 1: 195-200.
4. Weinstock, S, Reinis, K, and Soler, A. Tube-to-tubesheet joint interfacing pressure: Analysis and Experiments. ASME, J. Pres. Ves. Tech. 1987, 109 (5): 193-199.
5. Allam, M, and Bazergui, A. Axial strength of tube-to-tubesheet joints: Finite Element and Experimental Evaluations. ASME, J. Pres. Ves. Tech. 2002, 124 (2): 22-31.