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Using autofrettage technology to decrease stresses in a girth welded joint of a high pressure hydrogen tank

Abstract

A numerical model of a welded joint of the hydrogen storage tank was built. The stresses caused by inner pressure, welding, and autofrettage were investigated. Numerical results showed that complicated welded residual stresses were generated in the weld central line and heat affect zone, which made the stresses in the welded joint increase and fluctuate. In order to improve the stress distribution, the autofrettage process was used after welding. Comparison of stress distribution with and without autofrettage, showed that the autofrettage process caused stresses in the welded joint of the hydrogen storage tank to be more uniform along the wall, and decreased the influence of welding on the total stresses. Therefore, the safety of a high-pressure hydrogen storage tank is improved by the application of autofrettage. Copyright (C) 2015, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.

Year of Publication
2015
Journal
International Journal of Hydrogen Energy
Volume
40
Issue
25
Number of Pages
8110-8121+
Date Published
Jul 6
ISBN Number
0360-3199
Accession Number
WOS:000356556700020
URL
https://www.webofscience.com/wos/woscc/full-record/WOS:000356556700020
DOI
10.1016/j.ijhydene.2015.04.069
Short Title
Using autofrettage technology to decrease stresses in a girth welded joint of a high pressure hydrogen tank
Alternate Journal
Int J Hydrogen Energ
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