PSI - Issue 19

Théophane Vanlemmens et al. / Procedia Structural Integrity 19 (2019) 610–616 Vanlemmens, Elbel, Meneghetti/ Structural Integrity Procedia 00 (2019) 000 – 000

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Table 1: Comparison between PSM and test for weld extremities in terms of number of cycles

However, it should be noted that calibration of the PSM for a notch opening angle of 90° is still under investigation.

5. Conclusion

The tests done within this project have shown that the PSM seems to be a reliable alternative to R1 concept for the life assessment of welded structures. The efficiency of the method can allow the analyst to save a lot of time in the analysis. The method seems to be a little bit more pessimistic than the R1 concept, but since this seems to be systematic, this could be corrected by adjusting the PSM FAT class. However, more studies are needed on this point to be able to conclude. The next step that is needed before an efficient industrial application is an automation of the post treatment that has been done manually in this project. Concerning the weld ends, the first results presented in this paper are promising, although the results are too pessimistic as well. Some additional work is needed on this topic before using it for industrial applications.

References

[1] Elbel, Karge, November 2011, Improvements in the fatigue assessment of large welded structures using the nominal stress approach, Fatigue design proceedings, Senlis [2] Meneghetti et al., November 2017, The Peak Stress Method to assess the fatigue strength of welded joints using linear elastic finite elements analyses, Fatigue design proceedings, Senlis, [3] Meneghetti et al., May 2018, Rapid estimation of notch stress intensity factors in 3D large-scale welded structures using the peak stress method, Fatigue 2018 Congress, Poitiers [4] Hobbacher, Recommendations for fatigue design of welded joints and components [5] Jubin, Huther, October 2018, Influence des extrémités de cordon sur la tenue en fatigue – Etude des procédures de démarrage et arrêt, Rapport de projet commission TPMF/Cetim numéro 215078 [6] Kaffenberger et al., 2012, Fatigue resistance of weld ends, Computational Materials Science 53 (2012) 287-292