Local approach is applied to analysis of ductile fracture in steel welded joints. Welded single-edge notched bend (SENBspecimens with joints containing one or two weld metals are investigated. The Gurson plastic flow criterion is used, and the crack growth is modelled by observing damage in elements in front of the crack tip. The effect of various factors: microstructural parameters, joint width, initial crack length, as well as size and formulation of finite elements in the ligament, is examined. Special consideration is given to the connection between material microstructure and fracture behaviour, and it is found that initial porosity and finite element size that correspond to the microstructural quantities (volume fraction of non-metallic inclusions and mean free path between them, determined using quantitative microstructural analysisgive the most appropriate results. It is concluded that local approach enables estimation of ductile fracture initiation in analysed welded joints, a...lso capturing the constraint effect caused by the different joint widths and effect of material inhomogeneity along the crack front of the joints with two different weld metals.
TY - CONF
AU - Međo, Bojan
AU - Rakin, Marko
AU - Gubeljak, Nenad
AU - Arsić, Miodrag
AU - Sedmak, Aleksandar
PY - 2010
UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1550
AB - Local approach is applied to analysis of ductile fracture in steel welded joints. Welded single-edge notched bend (SENBspecimens with joints containing one or two weld metals are investigated. The Gurson plastic flow criterion is used, and the crack growth is modelled by observing damage in elements in front of the crack tip. The effect of various factors: microstructural parameters, joint width, initial crack length, as well as size and formulation of finite elements in the ligament, is examined. Special consideration is given to the connection between material microstructure and fracture behaviour, and it is found that initial porosity and finite element size that correspond to the microstructural quantities (volume fraction of non-metallic inclusions and mean free path between them, determined using quantitative microstructural analysisgive the most appropriate results. It is concluded that local approach enables estimation of ductile fracture initiation in analysed welded joints, also capturing the constraint effect caused by the different joint widths and effect of material inhomogeneity along the crack front of the joints with two different weld metals.
PB - 18th European Conference on Fracture: Fracture of Materials and Structures from Micro to Macro Scale, ECF 2010
C3 - 18th European Conference on Fracture: Fracture of Materials and Structures from Micro to Macro Scale
T1 - Local approach to analysis of ductile fracture in welded joints-Influence factors
UR - https://hdl.handle.net/21.15107/rcub_technorep_1550
ER -
@conference{
author = "Međo, Bojan and Rakin, Marko and Gubeljak, Nenad and Arsić, Miodrag and Sedmak, Aleksandar",
year = "2010",
abstract = "Local approach is applied to analysis of ductile fracture in steel welded joints. Welded single-edge notched bend (SENBspecimens with joints containing one or two weld metals are investigated. The Gurson plastic flow criterion is used, and the crack growth is modelled by observing damage in elements in front of the crack tip. The effect of various factors: microstructural parameters, joint width, initial crack length, as well as size and formulation of finite elements in the ligament, is examined. Special consideration is given to the connection between material microstructure and fracture behaviour, and it is found that initial porosity and finite element size that correspond to the microstructural quantities (volume fraction of non-metallic inclusions and mean free path between them, determined using quantitative microstructural analysisgive the most appropriate results. It is concluded that local approach enables estimation of ductile fracture initiation in analysed welded joints, also capturing the constraint effect caused by the different joint widths and effect of material inhomogeneity along the crack front of the joints with two different weld metals.",
publisher = "18th European Conference on Fracture: Fracture of Materials and Structures from Micro to Macro Scale, ECF 2010",
journal = "18th European Conference on Fracture: Fracture of Materials and Structures from Micro to Macro Scale",
title = "Local approach to analysis of ductile fracture in welded joints-Influence factors",
url = "https://hdl.handle.net/21.15107/rcub_technorep_1550"
}
Međo, B., Rakin, M., Gubeljak, N., Arsić, M.,& Sedmak, A.. (2010). Local approach to analysis of ductile fracture in welded joints-Influence factors. in 18th European Conference on Fracture: Fracture of Materials and Structures from Micro to Macro Scale
18th European Conference on Fracture: Fracture of Materials and Structures from Micro to Macro Scale, ECF 2010..
https://hdl.handle.net/21.15107/rcub_technorep_1550
Međo B, Rakin M, Gubeljak N, Arsić M, Sedmak A. Local approach to analysis of ductile fracture in welded joints-Influence factors. in 18th European Conference on Fracture: Fracture of Materials and Structures from Micro to Macro Scale. 2010;.
https://hdl.handle.net/21.15107/rcub_technorep_1550 .
Međo, Bojan, Rakin, Marko, Gubeljak, Nenad, Arsić, Miodrag, Sedmak, Aleksandar, "Local approach to analysis of ductile fracture in welded joints-Influence factors" in 18th European Conference on Fracture: Fracture of Materials and Structures from Micro to Macro Scale (2010),
https://hdl.handle.net/21.15107/rcub_technorep_1550 .
