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Pregled bibliografske jedinice broj: 138047

Zbornik radova

Autori: Gubeljak, Nenad; Kozak, Dražan; Matejiček, Franjo; Oblak, Maks
Naslov: Experimental and Numerical Analysis of Strength Overmatched Weld Root Passes on the Heat Affected Zone Fracture Behaviour
Izvornik: 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. 183-190.
Skup: 4th International Congress of Croatian Society of Mechanics
Mjesto i datum: Bizovac, Hrvatska, 18-20.09.2003.
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.
Vrsta sudjelovanja: Predavanje
Vrsta prezentacije u zborniku: Cjeloviti rad (više od 1500 riječi)
Vrsta recenzije: Međunarodna recenzija
Projekt / tema: 0152015, 0152018
Izvorni jezik: ENG
Kategorija: Znanstveni
Znanstvena područja:
Strojarstvo
Puni text rada: 138047.Paper_Gub_Koz_Mat_Obl.doc



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