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Advances in Materials Science and Engineering
Volume 2017, Article ID 5824171, 14 pages
Research Article

SPR Characteristics Curve and Distribution of Residual Stress in Self-Piercing Riveted Joints of Steel Sheets

1Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Sippy Downs, QLD 4556, Australia
2Faculty of Science, Engineering and Technology, Swinburne University of Technology, Hawthorn, VIC 3122, Australia
3Australian Nuclear Science and Technology Organisation, Lucas Heights, NSW 2234, Australia
4Henrob (UK) Pty Ltd, Geebung, QLD 4034, Australia

Correspondence should be addressed to Rezwanul Haque; ua.ude.csu@euqahr

Received 10 October 2016; Revised 25 November 2016; Accepted 4 December 2016; Published 15 February 2017

Academic Editor: Paolo Ferro

Copyright © 2017 Rezwanul Haque et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Neutron diffraction was used to describe the residual stress distributions in self-piercing riveted (SPR) joints. The sheet material displayed a compressive residual stress near the joint, and the stress gradually became tensile in the sheet material far away from the joint. The stress in the rivet leg was lower in the thick joint of the softer steel sheet than in the thin joint of the harder steel sheet. This lower magnitude was attributed to the lower force gradient during the rivet flaring stage of the SPR process curve. This study shows how the residual stress results may be related to the physical occurrences that happened during joining, using the characteristics curve. The study also shows that neutron diffraction technique enabled a crack in the rivet tip to be detected which was not apparent from a cross-section.