Naslov
The Influence of Residual Stresses on Fatigue Crack Growth Rate in Stiffened Panels

Autori
Božić, Željko ; Schmauder, Siegfried ; Wolf, Hinko

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of 2nd Mediterranean Conference & New Challenges on Heat Treatment and Surface Engineering / Smoljan, Božo ; Matijević, Božidar - Zagreb : Hrvatsko društvo za toplinsku obradu i inženjerstvo površina, 2013, 435-444

ISBN
978-953-7690-02-1

Skup
2nd Mediterranean Conference & New Challenges on Heat Treatment and Surface Engineering

Mjesto i datum
Cavtat, Hrvatska; Dubrovnik, Hrvatska, 11.06.2013. - 14.06.2013

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Modeling; Fatigue; Crack propagation; Residual stress

Sažetak
This paper presents models for predicting fatigue crack propagation in welded stiffened panels. The Mode I total stress intensity factor Ktot values with respect to crack length were determined based on the superposition rule of linear elastic fracture mechanics by using finite element method. The FEM models included idealized residual stress distribution patterns. By using the Paris power law equation the crack propagation life was simulated for a welded stiffened panel specimen and compared with results of cyclic tension fatigue tests. Numerical simulations demonstrated that tensile welding residual stresses in the vicinity of stiffeners increase the Ktot values and the crack growth rate. Compressive residual stresses between the stiffeners reduce the fatigue crack growth rate. This was in good agreement with experimental results. The results emphasized the significance of residual stresses in the assessment of the fatigue crack growth life in welded stiffened panels.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo

POVEZANOST RADA