Naslov
Growth of multiple fatigue cracks in plates under cyclic tension

Autori
Božić, Željko ; Wolf, Hinko ; Semenski, Damir

Izvornik
Transactions of FAMENA (1333-1124) 34 (2010); 1-12

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

Ključne riječi
multiple fatigue cracks; crack growth simulation; fatigue test

Sažetak
Fatigue life of plates damaged with multiple collinear cracks and subjected to cyclic tension loading was investigated. Results of fatigue crack growth tests with a constant tensile stress range were reported for a plate with a single crack and a plate with three collinear equidistant cracks. A simulation procedure based on numerical integration of the differential equation of a crack growth model was introduced. The Mode I stress intensity factor values, KI, were calculated by a FEM program using singular elements and assuming plane stress conditions. Using the Paris law, Klesnil- Lukáš and Zheng-Hirt crack growth models, the fatigue life was simulated for the test specimens. Experiments and simulations showed a higher crack growth rate for the specimen with three cracks and 40% shorter fatigue life compared to the specimen with a single crack, which is due to the interaction of multiple cracks.

Izvorni jezik
Engleski

Znanstvena područja
Grafička tehnologija, Strojarstvo, Zrakoplovstvo, raketna i svemirska tehnika

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