Influence of fabrication stresses on fatigue life of friction stir welded aluminium profiles |
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| Authors: | Meysam Mahdavi Shahri Rolf Sandström |
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| Affiliation: | 1. Applied Mechanics and Bioengineering, Aragón Institute of Engineering Research (I3A), University of Zaragoza, Spain;2. CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Spain;1. Department of Engineering Mechanics, Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, Ivana Lu?i?a 5, 10000 Zagreb, Croatia;2. LMT-Cachan, ENS Cachan/CNRS/University Paris-Saclay, 61 avenue du Président Wilson, 94235 Cachan Cedex, France;1. Department of Metallurgical Engineering and Materials Science, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India;2. Mechanical Metallurgy Division, Bhabha Atomic Research Centre, Mumbai 400085, India |
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| Abstract: | Influence of clamping and welding procedure on fatigue life of a friction stir (FS) welded aluminium profile has been analysed. Two series of aluminium profiles (series A and B) have been fatigue tested. The different clamping conditions in series A and B gave rise to different failure positions that could not be explained neither by the effective notch stress method, nor by the critical distance methods. The clamping in series A introduced plastic deformation at the weld notch that gave rise to tensile residual stresses. The failure position could be explained from the value of the stress intensity factor provided that the residual stresses were considered. |
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