Naslov
Elastoplastic analysis of external axial surface cracks in tubes

Autori
Tonković, Zdenko ; Skozrit, Ivica

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

Izvornik
Proceedings of the 2004 International Conference on Computational & Experimental Engineering & Sciences / Atluri, S.N. - , 2004

Skup
International Conference on Computational & Experimental Engineering and Sciences

Mjesto i datum
Madeira, Portugal, 26.07.2004. - 29.07.2004

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
finite element method; elastoplastic fracture analysis; J-integral evaluation; structural integrity; tubes

Sažetak
Systematic detailed linear and non-linear 3-D finite element analyses have been carried out to determine the stress intensity factors, the J-integral and the plastic limit loads for external axial semi-elliptical surface cracks in VVER steam generator tubes under internal pressure. The results for the stress intensity factors are presented in terms of the well-known GE/EPRI influence functions to allow comparisons with some results available in the literature. The plastic limit pressure solutions have been developed on the basis of finite element limit load analyses employing elastic-perfectly plastic material behaviour. Using these solutions, a new analytical approximation of the plastic limit pressure has been developed for a wide range of cracks. The proposed stress intensity factors and analytical approximation of limit pressure provide very useful tools for assessing the integrity of pressurized tubes.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo

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