Hrvatska znanstvena bibliografija (CROSBI)

Pregled bibliografske jedinice broj: 83880

Zbornik radova

Autori: Kozak, Dražan; Sedmak, Aleksandar; Adžiev Gjorgji; Gubeljak, Nenad
Naslov: Application of J-integral to strength mismatch welded structures
Izvornik: Proceedings of the 6th International Research/Expert Conference 'Trends in the development of machinery and associated technology' / Brdarević, Safet ; Ekinović, Sabahudin ; Compamys, Pascual Ramon (ur.). - Zenica : Faculty of Mechanical Engineering in Zenica , 2002. 353-356.
Skup: 6th International Research/Expert Conference 'Trends in the development of machinery and associated technology'
Mjesto i datum: Neum, Bosna i Hercegovina, 18-22.09.2002.
Ključne riječi: welded structures; J-integral; state-of-stress; path dependency; finite element analysys
This paper attempts to clarify the conditions under which the J -integral is path-independent in fracture toughness specimens with heterogeneous structure. For this purpose, three point bend specimens with thickness of 36mm consisting X-welded joint were produced with surface crack (a/W=0, 3) in the middle. The base material of the plate was high strength low allowed (HSLA) steel with about 700 MPa of yield strength. Welded joint has been performed as overmatch (mismatch factor M=1, 2). Standard fracture mechanics testing of specimens were carried out. During experiment load (F), load line displacement (LLD), crack mouth opening displacement (CMOD), crack tip opening displacement (CTOD) as well as crack extension Δ a were recorded. Plane stress and plane strain finite element (FE) models of the specimens have been performed. The validity of the numerical model has been proven comparing FE results with the same obtained experimentally. ANSYS code for the calculation of J-integral value through five paths around the crack tip has been applied. Path dependence of J-integral is more present with loading increasing, particularly after crack initiation. Calculated far field J-integral with PS assumption agrees more with experimental value. Numerical calculation of J-integral for inhomogeneous structures is possible, but one should have in mind all possible influences on results. First of all it depends on assumed state-of-stress by 2-D finite element modelling and geometry of the welded structure.
Vrsta sudjelovanja: Predavanje
Vrsta prezentacije u zborniku: Cjeloviti rad (više od 1500 riječi)
Vrsta recenzije: Međunarodna recenzija
Projekt / tema: 152004, 152002, 0152018, 0152015
Izvorni jezik: ENG
Kategorija: Znanstveni
Znanstvena područja:
Puni text rada: 83880.TMT02-114.doc