Residual Stress Redistribution During Elastic Shakedown in Fillet Welded Plate

Residual Stress Redistribution During Elastic Shakedown in Fillet Welded Plate

J.R. Chukkan, G. Wu, M.E. Fitzpatrick, X. Zhang, J. Kelleher

Abstract. Welding residual stresses exist in various welded structures such as ships and offshore structures. According to the load levels during operation, the as-welded residual stresses can be relaxed or redistributed. The elastic shakedown phenomenon can be considered as one of the reasons for the stress relaxation or redistribution. This work studies the redistribution of welding residual stresses during different levels of shakedown in a fillet-welded plate manufactured in line with ship design and welding procedures. Fillet welding was performed on a ship structural steel, DH36. The fillet welds were subjected to different levels of shakedown under tensile cyclic load. Neutron diffraction was used to measure residual stresses in these plates in the as-welded state and after elastic shakedown. A mixed hardening model in line with the Chaboche model was determined for both weld and base material. A shakedown limit analysis based on plastic work dissipation was developed as the shakedown criterion to estimate the shakedown limit on the component. Further, the redistribution of residual stresses due to elastic shakedown was quantified through experimental measurements.

Keywords
Residual Stress, Shakedown Limit Analysis, Elastic Shakedown, Neutron Diffraction, Stress Relaxation

Published online 9/11/2018, 6 pages
Copyright © 2018 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: J.R. Chukkan, G. Wu, M.E. Fitzpatrick, X. Zhang, J. Kelleher, ‘Residual Stress Redistribution During Elastic Shakedown in Fillet Welded Plate’, Materials Research Proceedings, Vol. 6, pp 233-238, 2018

DOI: https://dx.doi.org/10.21741/9781945291890-37

The article was published as article 37 of the book Residual Stresses 2018

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

References
[1] L. Gannon, N. Pegg, M. Smith, Y. Liu, Effect of residual stress shakedown on stiffened plate strength and behaviour, Ships and Offshore Structures. 8 (2013) 638-652. https://doi.org/10.1080/17445302.2012.664429
[2] J. Eckerlid, A. Ulfvarson, Redistribution of initial residual stresses in ship structural details and its effect on fatigue, Mar. Struct. 8 (1995) 385-406. https://doi.org/10.1016/0951-8339(94)00027-P
[3] M. Abdel-Karim, Shakedown of complex structures according to various hardening rules, Int. J. Pressure Vessels Piping. 82 (2005) 427-458. https://doi.org/10.1016/j.ijpvp.2005.01.007
[4] J. Bree, Elastic-plastic behaviour of thin tubes subjected to internal pressure and intermittent high-heat fluxes with application to fast-nuclear-reactor fuel elements, The Journal of Strain Analysis for Engineering Design. 2 (1967) 226-238. https://doi.org/10.1243/03093247V023226
[5] N. Lautrou, D. Thevenet, J. Cognard, A fatigue crack initiation approach for naval welded joints, 2 (2005) 1163-1170.
[6] J. Paik, O. Hughes, P. Rigo, Ultimate limit state design technology for aluminum multi-hull ship structures, Transactions-Society of Naval Architects and Marine Engineers. 113 (2006) 270-305.
[7] L. Li, T. Moan, B. Zhang, Residual stress shakedown in typical weld joints and its effect on fatigue of FPSOs, (2007) 193-201.
[8] J.R. Chukkan, G. Wu, M.E. Fitzpatrick, E. Eren, X. Zhang, J. Kelleher, Residual stress redistribution during elastic shake down in welded plates, 12th International Fatigue Congress (FATIGUE 2018), MATEC Web Conf.165 (2018) 21004.
[9] Y. Sun, S. Shen, X. Xia, Z. Xu, A numerical approach for predicting shakedown limit in ratcheting behavior of materials, Mater Des. 47 (2013) 106-114. https://doi.org/10.1016/j.matdes.2012.12.049
[10] J. Lemaitre, J. Chaboche, Mechanics of Solid Materials, Cambridge university press, 1994.
[11] R5, Assesment procedure for the high temperature response of structures, (2014).
[12] British Energy, R6 Revision 4: Assessment of the Integrity of Structures Containing Defects, Amendment 10, 2014.