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Vol.11 No.2previousAA157- SP20 (AA158-159-160-161-162) NT94

Academic Articles
Regular Paper Vol.11 No.2 (2019) p.79-p.85
 

Numerical Investigation on Persistence of Modified Residual Stresses Due to Shot Peening

 

Kazuki IKUSHIMA1,*, Yusuke YAMADA1, Masakazu SHIBAHARA1, Koichi AKITA2 and Satoru NISHIKAWA3
 
1 Osaka Prefecture University, 1-1 Gakuencho, Naka-ku, Sakai, Osaka 599-8531, Japan
2 Tokyo City University, 1-28-1, Tamatsutsumi, Setagawa-ku, Tokyo, 158-8557, Japan
3 Iwate University, 4-3-5, Ueda, Morioka, Iwate, 020-8551, Japan
 
Abstract
In this research, to investigate the persistence of compressive stress on a shot peened surface, the residual stresses in a multi-pass welded pipe joint after shot peening were analyzed. Then, the variation of the stress distribution in the welded pipe was examined by elastic plastic analyses under axial tension and compression with consideration of the shot peened residual stress distribution. As a result, it was found that the stress distribution remains in compression by applying tension followed by compression. It was also found that the compressive stress can decrease by applying compression followed by tension. From the above results, it can be said that the persistence of compressive stress due to shot peening should be discussed before the peening operation, especially a large load can be assumed to act on the shot peened part.
 
Keywords
Shot peening, Residual stresses, Multi-pass welding, Elastic-plastic analysis, Finite element analysis
 
Full Paper: PDF EJAM Vol. 11 No. 2 pp. 79-85 "Numerical Investigation on Persistence of Modified Residual Stresses Due to Shot Peening "
Article Information
Article history:
Received 15 October 2018
Accepted 11 September 2019