Residual Stress of Thin-Wall Pipe Subjected to Axisymmetric Plastic Expansion
Author:
Chiba Norimasa1, Ishida Yuji1, Ogasawara Nagahisa1, Ito Hiroshi1, Enomoto Kunio2, Kimoto Hiroshi2
Affiliation:
1. Department of Mechanical Engineering, National Defense Academy, 1-10-20 Hashirimizu, Yokosuka, Kanagawa 239-8686, Japan 2. Mechanical Engineering Research Laboratory, Hitachi, Ltd., 3-1-1 Saiwaicho, Hitachi, Ibaraki 317-8511, Japan
Abstract
A straight pipe was expanded at one end by inserting a rigid disk. The residual stress measured at the inner surface shows a strong tensile peak beyond the region where the pipe was directly expanded by the insertion of the disk. The reason the residual stress reaches its peak at a location further into the pipe is discussed based on a FE analysis. The residual stress was found to reach its tensile peak at the plastic region front that was developed during the pipe expansion. A simple formula for identifying the tensile peak location is also proposed.
Publisher
ASME International
Subject
Mechanical Engineering,Mechanics of Materials,Safety, Risk, Reliability and Quality
Reference10 articles.
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