Micromechanical analysis of constraint effect on fracture initiation in strength mismatched welded joints
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2007
Authors
Dobrojević, M.Rakin, Marko
Gubeljak, Nenad
Cvijović, Ivana
Zrilić, Milorad
Krunich, N.
Sedmak, Aleksandar
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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 arc-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.
Keywords:
Mismatched welded joint / Micromechanical model / High-strength low-alloyed steel / Ductile fracture / Constraint effectSource:
Materials Science Forum, 2007, 555, 571-576Publisher:
- Trans Tech Publications Ltd
Funding / projects:
- Specijalne teme mehanike loma materijala (RS-MESTD-MPN2006-2010-144027)
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Inovacioni centarTY - CONF AU - Dobrojević, M. AU - Rakin, Marko AU - Gubeljak, Nenad AU - Cvijović, Ivana AU - Zrilić, Milorad AU - Krunich, N. AU - Sedmak, Aleksandar PY - 2007 UR - https://machinery.mas.bg.ac.rs/handle/123456789/679 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 arc-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 C3 - Materials Science Forum T1 - Micromechanical analysis of constraint effect on fracture initiation in strength mismatched welded joints EP - 576 SP - 571 VL - 555 DO - 10.4028/0-87849-441-3.571 ER -
@conference{ 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 arc-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", journal = "Materials Science Forum", title = "Micromechanical analysis of constraint effect on fracture initiation in strength mismatched welded joints", pages = "576-571", volume = "555", doi = "10.4028/0-87849-441-3.571" }
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 joints. in Materials Science Forum Trans Tech Publications Ltd., 555, 571-576. https://doi.org/10.4028/0-87849-441-3.571
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 joints. in Materials Science Forum. 2007;555:571-576. doi:10.4028/0-87849-441-3.571 .
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 joints" in Materials Science Forum, 555 (2007):571-576, https://doi.org/10.4028/0-87849-441-3.571 . .