In this paper, the effect of strength mismatch and width of the welded joints oil the stress-strain distribution in the crack tip region has been discussed. The single-edge notched bend (SENB) specimens (precrack length a(0)/W= 0.32) were experimentally and numerically analysed. The model of local approach to fracture, proposed by Gurson, Tvergaard and Needleman, was used. High-strength low-alloyed (HSLA) steel was used as a base metal in quenched and tempered condition. The flux-cored arc-welding process in shielding gas was used. Two different fillers were selected to make over- and undermatched weld metal. The experimental analysis of fracture behaviour of the over- and undermatched welded joints was followed by numerical computations of void volume fraction in front of the crack tip. The critical void volume fraction, f(c), used in prediction of the crack growth initiation on the SENB specimen had been previously determined on a round smooth specimen. Three widths of weld metal wer...e considered: 6,12 and 18 mm. A comparison of the crack tip opening displacement (CTOD) values corresponding to crack initiation in the SENB specimens is given, as determined both experimentally and using the GTN model.
TY - JOUR
AU - Rakin, Marko
AU - Gubeljak, Nenad
AU - Dobrojević, M.
AU - Sedmak, Aleksandar
PY - 2008
UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5569
AB - In this paper, the effect of strength mismatch and width of the welded joints oil the stress-strain distribution in the crack tip region has been discussed. The single-edge notched bend (SENB) specimens (precrack length a(0)/W= 0.32) were experimentally and numerically analysed. The model of local approach to fracture, proposed by Gurson, Tvergaard and Needleman, was used. High-strength low-alloyed (HSLA) steel was used as a base metal in quenched and tempered condition. The flux-cored arc-welding process in shielding gas was used. Two different fillers were selected to make over- and undermatched weld metal. The experimental analysis of fracture behaviour of the over- and undermatched welded joints was followed by numerical computations of void volume fraction in front of the crack tip. The critical void volume fraction, f(c), used in prediction of the crack growth initiation on the SENB specimen had been previously determined on a round smooth specimen. Three widths of weld metal were considered: 6,12 and 18 mm. A comparison of the crack tip opening displacement (CTOD) values corresponding to crack initiation in the SENB specimens is given, as determined both experimentally and using the GTN model.
PB - Pergamon-Elsevier Science Ltd, Oxford
T2 - Engineering Fracture Mechanics
T1 - Modelling of ductile fracture initiation in strength mismatched welded joint
EP - 3510
IS - 11
SP - 3499
VL - 75
DO - 10.1016/j.engfracmech.2007.04.026
ER -
@article{
author = "Rakin, Marko and Gubeljak, Nenad and Dobrojević, M. and Sedmak, Aleksandar",
year = "2008",
abstract = "In this paper, the effect of strength mismatch and width of the welded joints oil the stress-strain distribution in the crack tip region has been discussed. The single-edge notched bend (SENB) specimens (precrack length a(0)/W= 0.32) were experimentally and numerically analysed. The model of local approach to fracture, proposed by Gurson, Tvergaard and Needleman, was used. High-strength low-alloyed (HSLA) steel was used as a base metal in quenched and tempered condition. The flux-cored arc-welding process in shielding gas was used. Two different fillers were selected to make over- and undermatched weld metal. The experimental analysis of fracture behaviour of the over- and undermatched welded joints was followed by numerical computations of void volume fraction in front of the crack tip. The critical void volume fraction, f(c), used in prediction of the crack growth initiation on the SENB specimen had been previously determined on a round smooth specimen. Three widths of weld metal were considered: 6,12 and 18 mm. A comparison of the crack tip opening displacement (CTOD) values corresponding to crack initiation in the SENB specimens is given, as determined both experimentally and using the GTN model.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Engineering Fracture Mechanics",
title = "Modelling of ductile fracture initiation in strength mismatched welded joint",
pages = "3510-3499",
number = "11",
volume = "75",
doi = "10.1016/j.engfracmech.2007.04.026"
}
Rakin, M., Gubeljak, N., Dobrojević, M.,& Sedmak, A.. (2008). Modelling of ductile fracture initiation in strength mismatched welded joint. in Engineering Fracture Mechanics
Pergamon-Elsevier Science Ltd, Oxford., 75(11), 3499-3510.
https://doi.org/10.1016/j.engfracmech.2007.04.026
Rakin M, Gubeljak N, Dobrojević M, Sedmak A. Modelling of ductile fracture initiation in strength mismatched welded joint. in Engineering Fracture Mechanics. 2008;75(11):3499-3510.
doi:10.1016/j.engfracmech.2007.04.026 .
Rakin, Marko, Gubeljak, Nenad, Dobrojević, M., Sedmak, Aleksandar, "Modelling of ductile fracture initiation in strength mismatched welded joint" in Engineering Fracture Mechanics, 75, no. 11 (2008):3499-3510,
https://doi.org/10.1016/j.engfracmech.2007.04.026 . .
