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Influence of technological flaw occurred during welding of header-nozzle joint using SAW welding process on the strength of welded joint


Konjatić, Pejo; Kozak, Dražan; Samardžić, Ivan; Despotović, Božo
Influence of technological flaw occurred during welding of header-nozzle joint using SAW welding process on the strength of welded joint // Design, Fabrication and Economy of Metal Structures / Jármai, Károly ; Farkas, József (ur.).
Miskolc, Hungary: Springer, 2013. str. 483-488 (predavanje, međunarodna recenzija, cjeloviti rad (in extenso), znanstveni)


Naslov
Influence of technological flaw occurred during welding of header-nozzle joint using SAW welding process on the strength of welded joint

Autori
Konjatić, Pejo ; Kozak, Dražan ; Samardžić, Ivan ; Despotović, Božo

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

Izvornik
Design, Fabrication and Economy of Metal Structures / Jármai, Károly ; Farkas, József - Miskolc, Hungary : Springer, 2013, 483-488

ISBN
978-3-642-36690-1

Skup
Design, Fabrication and Economy of Metal Structures 2013

Mjesto i datum
Miškolc, Mađarska, 24-26.04.2013

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
SAW welding; welded joint; flaw; inclusion; finite element method

Sažetak
This paper deals with the influence of technological flaw, occurred during welding of header-nozzle joint using SAW welding process, on the strength of welded joint. Three models of welded joints geometry are modeled: model without flaw, model with assumption of flaw existence around whole length of welded joint in form of torus with 1 mm diameter (the most dangerous case) and model with largest measured flaw with 1 mm diameter and with length of 8 mm. Numerical analyses using finite element method have been conducted. From obtained results it can be concluded that technological flaw occurred during process of welding does not influence the static strength of welded joint because there is no increase in stress, which is in all three models lower than yield strength. Even in the worst case scenario, when flaw with same diameter as largest detected flaw (1 mm) would occur along whole length of weld, it is not registered stress increasing in the region of weld joint subjected to internal pressure of 102 bar. Since there is no significant stress concentrations around flaws in all three models i.e. stresses do not exceed yield strength of material, there are no plastic deformations.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo



POVEZANOST RADA


Projekt / tema
152-1201910-1909 - Analiza i procjena loma konstrukcija iz anizotropnih materijala (Dražan Kozak, )
152-1521473-1474 - Napredni postupci izravne izradbe polimernih proizvoda (Pero Raos, )
152-1521473-1476 - Suvremene tehnologije spajanja lakih strojarskih konstrukcija (Ivan Samardžić, )

Ustanove
Strojarski fakultet, Slavonski Brod