Engineering analysis of notch root fatigue crack growth under spectrum loading

Sunder, R (1991) Engineering analysis of notch root fatigue crack growth under spectrum loading. International Journal of Fatigue, 13 (3). pp. 249-262. ISSN 0142-1123

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Abstract

An engineering procedure is described to predict notch root fatigue crack growth under spectrum loading. Long-crack growth rates and closure data, notch root stress-strain analysis and Rainflow cycle counting constitute major inputs to the prediction process. The procedure models non-uniform extension of the part-through crack13; front, crack growth in compression fatigue and the effect of tensile and compressive overloads. Crack growth predictions under constant-amplitude and combat aircraft spectrum loadings were compared with data from the literature for 2.3-mm and 6.25-mm thick 2024-T313; alloy sheet material. Good predictions were obtained for the thicker material using the linear elastic fracture mechanics approach. The thinner material required inclusion of strain-based intensity and residual stress effects for more realistic predictions. Neglecting13; these factors as a rule provided life estimates that are not conservative.

Item Type:	Journal Article
Additional Information:	Copyright for this article belongs to Elsevier Science
Uncontrolled Keywords:	Notch root crack growth;Central hole;Short crack;Crack closure; Cycle counting;Spectrum loading;Life prediction13;
Subjects:	ENGINEERING > Structural Mechanics
Division/Department:	Structures Division
Depositing User:	M/S ICAST NAL
Date Deposited:	08 Feb 2010
Last Modified:	07 May 2012 11:05
URI:	http://nal-ir.nal.res.in/id/eprint/4469

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