Naslov
Influence of graphite nodularity on plastification around crack tip of ductile iron

Autori
Lovrenić-Jugović, Martina ; Pustaić, Dragan ; Lazić, Ladislav ; Baleta, Jakov

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

Izvornik
Proceedings Book included on CD-ROM of 17th International Foundrymen Conference: Hi-tech casting solution and knowledge based engineering / Dolić, Natalija ; Zovko Brodarac, Zdenka ; Begić Hadžipašić, Anita - Sisak : Metalurški fakultet Sveučilišta u Zagrebu, 2018, 303-312

ISBN
978-953-7082-31-4

Skup
17th International Foundrymen Conference: High- tech casting solution and knowledge based engineering

Mjesto i datum
Opatija, Hrvatska, 16.05.2018. - 18.05.2018

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
graphite nodularity, Ramberg-Osgood equation, strain hardening exponent, Dugdale model, plastic zone magnitude around crack tip

Sažetak
The dependence of plastic zone magnitude around crack tip on graphite nodularity of cast iron wasconsidered in this paper. Mechanical properties of four different samples of cast iron as a function of graphite nodularity (21%, 52%, 77% and 95%) were taken from available literature. At plastic deformation, the cast iron is nonlinearly hardened in accordance with the Ramberg-Osgood equation. Those data wasfitted with non-linear Ramberg-Osgood equation, where material parameters were determined using least-squares method. Thin infinite plate with straight crack was loaded perpendicularly to the crack plane. Plastic zone magnitude around the crack tip was determined according to the Dugdale model. An isotropic and non-linear strain hardening of a plate material was assumed. The stress intensity coefficient from the cohesive stresses was calculated using Green functions. The analytical methods, assuming small plastic zone around a crack tip, were used in the analysis. The results were obtained by means of commercial software package and presented in the form of diagrams.

Izvorni jezik
Engleski

Znanstvena područja
Metalurgija, Strojarstvo

POVEZANOST RADA