TY  - JOUR
AU  - Dobrojević, M.
AU  - Rakin, Marko
AU  - Gubeljak, Nenad
AU  - Cvijović, Ivana
AU  - Zrilić, Milorad
AU  - Krunich, N.
AU  - Sedmak, Aleksandar
PY  - 2007
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1131
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.
PB  - Trans Tech Publications Ltd, Durnten-Zurich
T2  - Research Trends in Contemporary Materials Science
T1  - Micromechanical analysis of constraint effect on fracture initiation in strength mismatched welded
EP  - 
SP  - 571
VL  - 555
DO  - 10.4028/www.scientific.net/MSF.555.571
ER  - 

@article{
author = "Dobrojević, M. and Rakin, Marko and Gubeljak, Nenad and Cvijović, Ivana and Zrilić, Milorad and Krunich, N. and Sedmak, Aleksandar",
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.",
publisher = "Trans Tech Publications Ltd, Durnten-Zurich",
journal = "Research Trends in Contemporary Materials Science",
title = "Micromechanical analysis of constraint effect on fracture initiation in strength mismatched welded",
pages = "-571",
volume = "555",
doi = "10.4028/www.scientific.net/MSF.555.571"
}

Dobrojević, M., Rakin, M., Gubeljak, N., Cvijović, I., Zrilić, M., Krunich, N.,& Sedmak, A.. (2007). Micromechanical analysis of constraint effect on fracture initiation in strength mismatched welded. in Research Trends in Contemporary Materials Science
Trans Tech Publications Ltd, Durnten-Zurich., 555, 571-.
https://doi.org/10.4028/www.scientific.net/MSF.555.571

Dobrojević M, Rakin M, Gubeljak N, Cvijović I, Zrilić M, Krunich N, Sedmak A. Micromechanical analysis of constraint effect on fracture initiation in strength mismatched welded. in Research Trends in Contemporary Materials Science. 2007;555:571-.
doi:10.4028/www.scientific.net/MSF.555.571 .

Dobrojević, M., Rakin, Marko, Gubeljak, Nenad, Cvijović, Ivana, Zrilić, Milorad, Krunich, N., Sedmak, Aleksandar, "Micromechanical analysis of constraint effect on fracture initiation in strength mismatched welded" in Research Trends in Contemporary Materials Science, 555 (2007):571-,
https://doi.org/10.4028/www.scientific.net/MSF.555.571 . .