TY  - CONF
AU  - Dobrojevic, M.
AU  - Rakin, Marko P.
AU  - Gubeljak, Nenad
AU  - Cvijović, Ivana
AU  - Zrilic, M.
AU  - Krunich, N.
AU  - Sedmak, Aleksandar S.
PY  - 2007
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6701
AB  - In this paper the micromechanical approach to ductile fracture was applied in a study of constraint effect on crack growth initiation in mismatched welded joints. The single-edged notched bend specimens (precrack length a(0)/W=0.32) were experimentally and numerically analyzed. The coupled micromechanical model proposed by Gurson, Tvergaard and Needleman was used. Constraint effect was tested by varying widths of the welded joints (6, 12 and 18mm). High-strength low-alloyed (HSLA) steel was used as the base metal in a quenched and tempered condition. The flux-cored are-welding process in shielding gas was used. Two different fillers were selected to obtain over- and undermatched weld metal. The micromechanical parameters used in prediction of the crack growth initiation on precracked specimen were calibrated on a round smooth specimen. The difference in fracture behavior between over- and undermatched welded joints obtained in experimental results was followed by numerical computations of void volume fraction in front of the crack tip.
C3  - Materials Science Forum
T1  - Micromechanical analysis of constraint effect on fracture initiation in strength mismatched welded
VL  - 555
SP  - 571
EP  - +
DO  - 10.4028/www.scientific.net/MSF.555.571
ER  - 

@conference{
author = "Dobrojevic, M. and Rakin, Marko P. and Gubeljak, Nenad and Cvijović, Ivana and Zrilic, M. and Krunich, N. and Sedmak, Aleksandar S.",
year = "2007",
abstract = "In this paper the micromechanical approach to ductile fracture was applied in a study of constraint effect on crack growth initiation in mismatched welded joints. The single-edged notched bend specimens (precrack length a(0)/W=0.32) were experimentally and numerically analyzed. The coupled micromechanical model proposed by Gurson, Tvergaard and Needleman was used. Constraint effect was tested by varying widths of the welded joints (6, 12 and 18mm). High-strength low-alloyed (HSLA) steel was used as the base metal in a quenched and tempered condition. The flux-cored are-welding process in shielding gas was used. Two different fillers were selected to obtain over- and undermatched weld metal. The micromechanical parameters used in prediction of the crack growth initiation on precracked specimen were calibrated on a round smooth specimen. The difference in fracture behavior between over- and undermatched welded joints obtained in experimental results was followed by numerical computations of void volume fraction in front of the crack tip.",
journal = "Materials Science Forum",
title = "Micromechanical analysis of constraint effect on fracture initiation in strength mismatched welded",
volume = "555",
pages = "571-+",
doi = "10.4028/www.scientific.net/MSF.555.571"
}

Dobrojevic, M., Rakin, M. P., Gubeljak, N., Cvijović, I., Zrilic, M., Krunich, N.,& Sedmak, A. S.. (2007). Micromechanical analysis of constraint effect on fracture initiation in strength mismatched welded. in Materials Science Forum, 555, 571-+.
https://doi.org/10.4028/www.scientific.net/MSF.555.571

Dobrojevic M, Rakin MP, Gubeljak N, Cvijović I, Zrilic M, Krunich N, Sedmak AS. Micromechanical analysis of constraint effect on fracture initiation in strength mismatched welded. in Materials Science Forum. 2007;555:571-+.
doi:10.4028/www.scientific.net/MSF.555.571 .

Dobrojevic, M., Rakin, Marko P., Gubeljak, Nenad, Cvijović, Ivana, Zrilic, M., Krunich, N., Sedmak, Aleksandar S., "Micromechanical analysis of constraint effect on fracture initiation in strength mismatched welded" in Materials Science Forum, 555 (2007):571-+,
https://doi.org/10.4028/www.scientific.net/MSF.555.571 . .