Abstract
The fatigue strength improvement of materials and welded structures calls for calls for preciseness. The advantages of removing or mitigate tensile residual stresses and using the beneficial compressive residual stresses created by thermal and mechanical post-weld treatments are already known in welding communities. One solution is to improve the fatigue strength of welded structures by mechanical impact post-weld treatments. By an efficient High-Frequency Mechanical Impact (HFMI) treatment a significant improvement on local work hardening, reduction of notches effect, and fatigue strength could by obtained.
It is well known that HFMI is widely adopted for ships and offshore structures to improve fatigue life of welded joints. However, numerous aspects of this method need to be clarified or further investigated. The present study focuses on the influence of the position of the tool during HFMI treatment by numerically investigating the peening response on a welded joint under different positions, using a symmetric T-Welded Joint Model, with different peening tool angles regarding to the web and different impact positions around the weld toe.
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Ruiz, H.O., Osawa, N., Vega, A., De Gracia, L.C. (2020). A Practical Analysis of the Influence of Tool Positioning During High-Frequency Mechanical Impact Treatment on a Welded Joint. In: Carreño Moreno, V., Vega Saenz, A., Carral Couce, L., Saravia Arenas, J. (eds) Proceeding of the VI International Ship Design & Naval Engineering Congress (CIDIN) and XXVI Pan-American Congress of Naval Engineering, Maritime Transportation and Port Engineering (COPINAVAL). CIDIN COPINAVAL 2019 2019. Springer, Cham. https://doi.org/10.1007/978-3-030-35963-8_25
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DOI: https://doi.org/10.1007/978-3-030-35963-8_25
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