Naslov
Comparison of fatigue crack retardation methods

Autori
Domazet, Željko

Izvornik
Engineering failure analysis (1350-6307) 3 (1996), 2; 137-147

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
fatigue crack retardation; repair welding; CFRP patches; arrest holes

Sažetak
The efficiency of several fatigue crack retarding methods are examined. Al-alloy flat specimens with a central "key hole" starter notch were tested in a closed-loop servo hydraulic test machine. After the cracks had propagated to a predefined value, the following crack retarding methods were undertaken: repair welding, welding metal reinforcements, adhesively bonded CFRP patches, single peak tensile overloads and fatigue crack arrest holes. Fatigue test programmes were performed with constant load amplitudes and spectrum tensile loads. The results show that expanded and filled crack arrest holes, and CFRP patches applied to both sides, are the best fatigue crack retarding methods with all load conditions.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo

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