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- W2247882275 abstract "Integral structures offer large benefits in terms of manufacturing cost, but suffer from a lower degree of fail safety when compared to built-up structures. In order to achieve an improvement on the fatigue crack propagation (FCP), crack containment features (also known as crenellations) have been used on these structures. The source of the FCP improvement is the stress intensity factor (K) modification due to the geometry change. In the current study, an analysis about means of estimating K from the experimental information, and also to verify the K behavior while the crack propagates was performed. The study tested two AA 7475 panels, one with crenellations and another without. As the crack propagates, the K values were estimated in two forms, based on the crack propagation rate and by using a digital image correlation (DIC) system, coupled with strain gages. Based on DIC system, it was possible to evaluate the K estimation, the singularity dominated zone size and the K increase, as long as the crack propagated, for both test specimens. A comparison between the two methods was also made, and finally the use of a DIC system as a tool for estimating the K parameter was discussed." @default.
- W2247882275 created "2016-06-24" @default.
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- W2247882275 date "2016-01-01" @default.
- W2247882275 modified "2023-09-27" @default.
- W2247882275 title "Experimental Determination of the Crack Tip Stress Intensity Factor in Integrally Stiffened Panels" @default.
- W2247882275 doi "https://doi.org/10.4028/www.scientific.net/amr.1135.112" @default.
- W2247882275 hasPublicationYear "2016" @default.
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