PSI - Issue 19

M. Duchet et al. / Procedia Structural Integrity 19 (2019) 585–594 Author name / Structural Integrity Procedia 00 (2019) 000 – 000

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Fig. 6: comparison of weld geometry between the as welded and after TIG remelting.

Fig. 5: Fatigue S-N curve of lap joint specimen (FB590, 2.5 mm) after TIG remelting.

Fig. 8: comparison of weld geometry between the as welded and after transversal oscillating welding.

Fig. 7: Fatigue properties of lap joints (FB590, 2.5 mm) after transversal oscillating welding.

3. Technological specimen “demonstrators” The work done on lap-joint specimens has permitted to assess the improvement of their fatigue behaviour. Nevertheless, lap-joints are simple axially loaded specimens in tension, far from a real application. By consequence, specific specimens, inspired from work carried out by members of the Japanese Society of Automotive Engineers [5], and surnamed demonstrators, have been designed. They are representative of real arc-welded assemblies found in components, such as a multi-links rear axle, a front subframe or a body mount support of typical pickups frame as shown is the Fig. 9.Fig. 9: representative specimens extracted from real components (body mount support of pickup frame). In a first part, the different demonstrators are detailed and the way to load them. In a second part, different fatigue results are presented.