文档介绍：Reliability Study of the
Hydraulically Expanded
Tube-to-Tubesheet Joint
Caifu Qian
A three-dimensional parametrized finite element model is established for the nonlinear
Chenghong Duan analysis of the hydraulically expanded tube-to-tubesheet joint. Distribution of the re-
sidual contact pressure on the contact surface between the tube and the tubesheet is
Hongjie Yu investigated. It is found that sealing circular bands exist on the contact surface which
enhance the sealing of the joint since the residual contact pressures on the sealing
Hongwei Duan circular bands are higher than on other positions. The sealing circular bands are located
close to the two ends of the hole when it is not grooved, but they are located at the two
Junli Tian brinks of the groove for a grooved hole and in the latter case, the residual contact
pressures are even higher, reflecting that the joint with a grooved tube-sheet hole is more
Beijing University of Chemical Technology, capable of sealing. Experiments and finite element calculations for the pull-out force of
Beijing 100029, . the joint are also performed for different expansion pressures and groove widths. Results
show that with the increase of the groove width, the measured pull-out force increases
significantly and es larger and larger than the calculated one, which is owing to
the scratch on the contact surf