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Influence of chosen expression for J-integral and plastic collapse loads on structural integrity assessment of surface cracked thick-walled tubes


Skozrit, Ivica; Tonković, Zdenko; Kozak, Dražan; Čanađija, Marko
Influence of chosen expression for J-integral and plastic collapse loads on structural integrity assessment of surface cracked thick-walled tubes // Proceedings of the 7th Conference on New Trends in Fatigue and Fracture Meeting / Toth, Laslo ; Pluvinage, Guy (ur.).
Miskolctapolca, 2007. (predavanje, međunarodna recenzija, cjeloviti rad (in extenso), znanstveni)


Naslov
Influence of chosen expression for J-integral and plastic collapse loads on structural integrity assessment of surface cracked thick-walled tubes

Autori
Skozrit, Ivica ; Tonković, Zdenko ; Kozak, Dražan ; Čanađija, Marko

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

Izvornik
Proceedings of the 7th Conference on New Trends in Fatigue and Fracture Meeting / Toth, Laslo ; Pluvinage, Guy - Miskolctapolca, 2007

Skup
7th Conference on New Trends in Fatigue and Fracture Meeting

Mjesto i datum
Miskolctapolca, Mađarska, 3-4.05.2007

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
J-integral; plastic limit pressure; plastic collapse pressure; GE/EPRI; reference stress method

Sažetak
The plastic limit and collapse loads as well as the stress intensity factor and J-integral of thick-walled tubes with external axial semi-elliptical surface cracks are investigated by three-dimensional non-linear finite element analyses. Unlike the existing solutions, the newly developed analytical approximation of the plastic limit pressure for thick-walled tubes is applicable to a wide range of crack dimensions. The influence of the choice of flow stress on the plastic collapse estimation of steam generator tubes is considered. Numerical results show that the flow stress, defined by some Failure Assessment Diagram methods, depends not only on the tube material, but also on the crack geometry. Further, for application of the J-integral results to general stress-strain laws, the J estimation equation is re-formulated using the modified reference stress approach.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo



POVEZANOST RADA


Projekt / tema
069-0691736-1737 - Numerička analiza odziva konstrukcija za određena područja eksploatacije (Josip Brnić, )
120-1201910-1812 - Numeričko modeliranje procesa deformiranja bioloških tkiva (Jurica Sorić, )
120-1201910-1906 - Modeliranje oštećenja i sigurnost konstrukcija (Zdenko Tonković, )
152-1201910-1909 - Analiza i procjena loma konstrukcija iz anizotropnih materijala (Dražan Kozak, )

Ustanove
Tehnički fakultet, Rijeka,
Fakultet strojarstva i brodogradnje, Zagreb,
Strojarski fakultet, Slavonski Brod