A friction stir welding (FSW) tool geometry, consisting of a shoulderless conical probe, is investigated for application to closed contour welding, variable thickness welding, and open-loop control welding.
The Direct Strength Method (DSM), which was newly developed and adopted as an alternative to the effective width method for the design of cold-formed steel sections recently by NAS (AISI, 2004), was calibrated by using the test results for application to welded steel sections.
The application of these approaches to a welded joint with cut-out holes in orthotropic bridge decks, where it is not easy to distinguish the non-linear stress caused by the notch at the weld toe from the stress concentration effect emanating from the hole in the detail, was investigated.
Hence, this article is devoted to the improvement of this technique and its application to the identification of weld defects in the gas distribution pipelines of the "Tunisian Society of Electricity and Gas distribution: STEG".
This is the basis for future applications to welded structures in presence of mixed mode loading.
Finally, the application to the fatigue life assessment of welded elements is presented and compared to experimental results.
Arc welding is a complex process, the dynamics of which are affected by many manufacturing conditions that typically vary during welding or vary from application to application.
Specifically, this study investigated the fatigue life enhancement afforded by three retrofit methods: post-installation of tensioned bolts behind the weld, application of Ultrasonic Impact Treatment UITto thethe weld, and a combination of the two techniques.
Susceptibility to porosity and fusion defects has limited the use of arc welding of aluminium to applications where weld quality is not of paramount importance (Table 3).
This method of surface treatment, where the efficiency of the jet is enhanced by the generation of pulses using an acoustic generator, showed promising results for its practical application as a post-weld treatment method.
