Numerical prediction of ductile fracture resistance of welded joint zones
Apstrakt
This study deals with the numerical prediction of ductile fracture initiation and development in welded joints of a high strength low alloyed steel. Having in mind the material heterogeneity in the joint zone, a combined experimental-numerical procedure is applied for determination of properties of the weld metal and heat affected zone - HAZ (both coarse-grained and fine-grained portion). Single smooth tensile specimen is tested, and the surface strains are determined during this test using stereometric measurement. Combined with numerical analysis, this enabled determination of stress-strain curves, which are subsequently used in numerical analysis of fracture of pre-cracked specimens. Two different geometries are considered: standard single-edge notched bend (SENB) specimens and surface-cracked tensile specimens. In each of them, the crack is positioned either in weld metal or between the coarse-grained and fine-grained HAZ. Micromechanical model (complete Gurson model, by Z.L. Zhang...) is applied in numerical analysis. Higher resistance to ductile fracture initiation and crack growth in HAZ is successfully predicted, as well as constraint effect caused by different crack shapes.
Ključne reči:
welded joint / heat affected zone / ductile fracture / numerical analysis / micromechanical modelIzvor:
21st European Conference on Fracture, (ECF21), 2016, 2, 753-760Izdavač:
- Elsevier Science Bv, Amsterdam
Finansiranje / projekti:
- Mikromehanički kriterijumi oštećenja i loma (RS-MESTD-Basic Research (BR or ON)-174004)
DOI: 10.1016/j.prostr.2016.06.097
ISSN: 2452-3216
WoS: 000387976800096
Scopus: 2-s2.0-85065786898
Institucija/grupa
Tehnološko-metalurški fakultetTY - JOUR AU - Younise, Bashir AU - Rakin, Marko AU - Gubeljak, Nenad AU - Međo, Bojan AU - Sedmak, Aleksandar PY - 2016 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3295 AB - This study deals with the numerical prediction of ductile fracture initiation and development in welded joints of a high strength low alloyed steel. Having in mind the material heterogeneity in the joint zone, a combined experimental-numerical procedure is applied for determination of properties of the weld metal and heat affected zone - HAZ (both coarse-grained and fine-grained portion). Single smooth tensile specimen is tested, and the surface strains are determined during this test using stereometric measurement. Combined with numerical analysis, this enabled determination of stress-strain curves, which are subsequently used in numerical analysis of fracture of pre-cracked specimens. Two different geometries are considered: standard single-edge notched bend (SENB) specimens and surface-cracked tensile specimens. In each of them, the crack is positioned either in weld metal or between the coarse-grained and fine-grained HAZ. Micromechanical model (complete Gurson model, by Z.L. Zhang) is applied in numerical analysis. Higher resistance to ductile fracture initiation and crack growth in HAZ is successfully predicted, as well as constraint effect caused by different crack shapes. PB - Elsevier Science Bv, Amsterdam T2 - 21st European Conference on Fracture, (ECF21) T1 - Numerical prediction of ductile fracture resistance of welded joint zones EP - 760 SP - 753 VL - 2 DO - 10.1016/j.prostr.2016.06.097 ER -
@article{ author = "Younise, Bashir and Rakin, Marko and Gubeljak, Nenad and Međo, Bojan and Sedmak, Aleksandar", year = "2016", abstract = "This study deals with the numerical prediction of ductile fracture initiation and development in welded joints of a high strength low alloyed steel. Having in mind the material heterogeneity in the joint zone, a combined experimental-numerical procedure is applied for determination of properties of the weld metal and heat affected zone - HAZ (both coarse-grained and fine-grained portion). Single smooth tensile specimen is tested, and the surface strains are determined during this test using stereometric measurement. Combined with numerical analysis, this enabled determination of stress-strain curves, which are subsequently used in numerical analysis of fracture of pre-cracked specimens. Two different geometries are considered: standard single-edge notched bend (SENB) specimens and surface-cracked tensile specimens. In each of them, the crack is positioned either in weld metal or between the coarse-grained and fine-grained HAZ. Micromechanical model (complete Gurson model, by Z.L. Zhang) is applied in numerical analysis. Higher resistance to ductile fracture initiation and crack growth in HAZ is successfully predicted, as well as constraint effect caused by different crack shapes.", publisher = "Elsevier Science Bv, Amsterdam", journal = "21st European Conference on Fracture, (ECF21)", title = "Numerical prediction of ductile fracture resistance of welded joint zones", pages = "760-753", volume = "2", doi = "10.1016/j.prostr.2016.06.097" }
Younise, B., Rakin, M., Gubeljak, N., Međo, B.,& Sedmak, A.. (2016). Numerical prediction of ductile fracture resistance of welded joint zones. in 21st European Conference on Fracture, (ECF21) Elsevier Science Bv, Amsterdam., 2, 753-760. https://doi.org/10.1016/j.prostr.2016.06.097
Younise B, Rakin M, Gubeljak N, Međo B, Sedmak A. Numerical prediction of ductile fracture resistance of welded joint zones. in 21st European Conference on Fracture, (ECF21). 2016;2:753-760. doi:10.1016/j.prostr.2016.06.097 .
Younise, Bashir, Rakin, Marko, Gubeljak, Nenad, Međo, Bojan, Sedmak, Aleksandar, "Numerical prediction of ductile fracture resistance of welded joint zones" in 21st European Conference on Fracture, (ECF21), 2 (2016):753-760, https://doi.org/10.1016/j.prostr.2016.06.097 . .