Experimental and analytical assessment of fatigue and crack propagation in cold worked open hole specimens. Issue 9 (30th April 2013)

• Record Type: Journal Article
• Authors: Boni, L.; Fanteria, D.; Lanciotti, A.; Polese, C.; Susmel, L.; Iacoviello, F.; Ferro, G.
• Is Part Of: Fatigue & fracture of engineering materials & structures. Volume 36:Issue 9(2013:Sep.)
• Page Start: 930
• Page End: 941
• Publication Date: 2013-04-30
• Subjects: Materials -- Fatigue -- Periodicals; Fracture mechanics -- Periodicals; 620.1123
• DOI: 10.1111/ffe.12050
• Languages: English
• ISSNs: 8756-758X

Abstract

<abstract abstract-type="main"> <title>ABSTRACT</title> <p>Fatigue and crack propagation tests are carried out on 7075‐T73 open hole aluminium alloy specimens. A remarkable increment of fatigue life due to the Split Sleeve Cold Expansion^TM process is observed, further improved by applying the process twice on the same hole. Comparable increments are obtained by using the StressWave^TM method. Specific tests are performed in order to point out a possible relaxation of the residual stresses due to fatigue loading. The results obtained reveal no relaxation phenomena in the tested specimens.</p> <p>The compressive residual stress around cold expanded holes is numerically evaluated. Dedicated experiments based on the Sachs method are conducted to confirm the residual stress prediction.</p> </abstract>