文档介绍：Proceedings of PVP2006-ICPVT-11
2006 ASME Pressure Vessels and Piping Division Conference
July 23-27, 2006, Vancoucer, BC, Canada
PVP2006-ICPVT-11-93164
RESEARCH OF ELASTOMERIC EXPANSION FOR TUBE-TO-TUBESHEET JOINT
J. W. Hao, H. L. Pan, S. H. Tang
School of Mechanical and Power Engineering, East China University of Science and Technology,
Shanghai, 200237, P. R. of China
distorts the grains, so the residual stresses are high and the tube
ABSTRACT elongation may induce additional axial stresses. Explosive
Just as hydraulic expansion, elastomeric expansion is an forming has been essfully used for many years, but is not
alternative method to produce tube-to-tubesheet joint with low used widely because of its danger[6]. The residual stress left by
residual stress level. However, the key parameters of the explosive forming is not investigated in detail; however, it is
elastomer expansion are different from the hydraulic expansion. considered that it is lower than the residual stress left by
For elastomeric expansion, the problems lie in three aspects, (1) mechanical rolling because the expanding pressure is lower and
the expanding pressure (the radial pressure) applied to the almost uniform. Hydraulic forming was developed by an
surface of the tube is difficult to be measured directly; (2) the engineer of West Germany in 1943[7]. It i