Simulations of fatigue crack propagation in friction stir welds under flight loading conditions*

Autor:	T. Ghidini, Claudio Dalle Donne, C. Polese, Agostino Lanciotti
Rok vydání:	2006
Předmět:	Materials science business.industry Mechanical Engineering Fracture mechanics Structural engineering Welding Paris' law Fatigue crack propagation law.invention Crack closure Mechanics of Materials Residual stress law Friction stir welding General Materials Science business Joint (geology)
Zdroj:	Materials Testing. 48:370-375
ISSN:	2195-8572 0025-5300
DOI:	10.3139/120.100746
Popis:	Since Friction Stir Welding has been identified as a key technology for primary aerospace structures, fatigue crack growth testing and modelling is required. However, there is still a complete lack of information regarding the fatigue crack propagation in friction stir welds under variable amplitude loading and flight loading conditions. Experimental investigations have been performed on centre cracked 4 mm thick AA2024-T3 base metal and FSW specimens: regarding the FSW samples, the crack was placed 5 mm out of the weld centre, in the most critical part of the joint: the coupons have been tested under simple variable amplitude load sequences, and under a standardized flight-simulation load history, Falstaff. The fatigue crack propagation was then predicted using widespread aerospace fracture mechanics software packages. Interaction effects and internal residual stresses were firstly separately simulated and than combined in order to evaluate the ability to predict the fatigue crack propagation on FSW welded structures under service loading conditions.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::8f6e9a8b4d9fda7cc9c8142f146d65f2 https://doi.org/10.3139/120.100746 Zobrazit plný text záznamu