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Expansion of cracked fastener holes as a measure for extension of lifetime to repair

	Engineering fracture mechanics 28 (1987), No.5/6, pp.689-698 : Abb.,Lit. ISSN: 0013-7944

	English
	Journal Article
	Fraunhofer LBF ()
	Aluminiumlegierung; Aufdornung; Bohrung(angerissen); Lebensdauerverlängerung; Nietverbindung; Reparaturmaßnahme; Rißfortschritt

Abstract
This paper presents results of experimental and theoretical investigations about the influence of cold expansion on crack-propagation life of pre-cracked fastener holes in 2024T3 aluminium alloy. Three different types of test specimens with different levels of load transfer and secondary bending and different pre-crack configurations were used. It turned out that these parameters as well as the type of loading (constant amplitude or flight-by-flight) and the initial crack length have a considerable influence on the possible gain in crack-propagation life. (LBF)

: http://publica.fraunhofer.de/documents/PX-13400.html