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Pregled bibliografske jedinice broj: 138047

Experimental and Numerical Analysis of Strength Overmatched Weld Root Passes on the Heat Affected Zone Fracture Behaviour


Gubeljak, Nenad; Kozak, Dražan; Matejiček, Franjo; Oblak, Maks
Experimental and Numerical Analysis of Strength Overmatched Weld Root Passes on the Heat Affected Zone Fracture Behaviour // Extended Abstracts and Proceedings (CD-ROM Edition) of the 4th International Congress of Croatian Society of Mechanics / Matejiček, Franjo (ur.).
Zagreb: Croatian Society of Mechanics, 2003. str. 183-190 (predavanje, međunarodna recenzija, cjeloviti rad (in extenso), znanstveni)


Naslov
Experimental and Numerical Analysis of Strength Overmatched Weld Root Passes on the Heat Affected Zone Fracture Behaviour

Autori
Gubeljak, Nenad ; Kozak, Dražan ; Matejiček, Franjo ; Oblak, Maks

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

Izvornik
Extended Abstracts and Proceedings (CD-ROM Edition) of the 4th International Congress of Croatian Society of Mechanics / Matejiček, Franjo - Zagreb : Croatian Society of Mechanics, 2003, 183-190

Skup
4th International Congress of Croatian Society of Mechanics

Mjesto i datum
Bizovac, Hrvatska, 18-20.09.2003.

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Fracture toughness testing; weld joint; heat affected zone; finite element analysis

Sažetak
In the last decade the extensive fracture toughness testing of welded joints with the crack located in the heat-affected zone of structural steels was performed. Many investigations of fracture behaviour show that unpredictable fracture behaviour of specimen with crack tip located in HAZ can occur. The reason for such behaviour may lie in the HAZ microstructure heterogeneity and existing of local brittle zones (coarse-grained heat affected zone - CGHAZ). The spreading of stress and strain fields in the vicinity of crack tip, which is located in the HAZ, may be analysed very effective by finite element calculation. The aim of this paper is to determine the effect of different crack tip position in HAZ on crack driving force and consequently on fracture behaviour of strength mismatch fracture toughness specimen. The results for principal stresses distribution shown that highest maximum principal stress is reached just under the HAZ crack tip in direction of BM. Numerical analysis shows that changing of crack tip position has a significant effect on fracture behavior in elastic and plastic loading range. Significantly low effect on fracture behaviour has changing of amount of overmatching weld metal in root layer. Obtained results give principles for idealization of finite elements modelling of fracture behavior of welded joints.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo



POVEZANOST RADA


Projekt / tema
0152015
0152018

Ustanove
Strojarski fakultet, Slavonski Brod