Fatigue Behavior of Tube-to-Tubesheet Expanded Joints

[+] Author and Article Information
Z. F. Sang, Y. Z. Zhu

Mechanical Engineering Department, Nanjing Institute of Chemical Technology, Nanjing, People’s Republic of China

G. E. O. Widera

Mechanical Engineering Department, University of Illinois at Chicago, Chicago, IL 60680

J. Pressure Vessel Technol 113(2), 341-344 (May 01, 1991) (4 pages) doi:10.1115/1.2928765 History: Received February 19, 1991; Online June 17, 2008


In order to study the fatigue behavior of expanded tube-to-tubesheet joints for steam generators and tubular heat exchangers under cyclical loading, both static and fatigue tests were performed. As a result of the sticking interface which is formed between the tube and tubesheet hole, it is shown that: 1) the expanded joint of tube-tubesheet interface is not sensitive to cyclic loads, 2) the fatigue strength of the expanded joint is higher than that of the tube materials, and 3) cyclic loads have no obvious effect on the static pull-out strength.

Copyright © 1991 by The American Society of Mechanical Engineers
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