Numerical prediction of ductile fracture resistance of welded joint zones
Апстракт
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.
Кључне речи:
welded joint / numerical analysis / micromechanical model / heat affected zone / ductile fractureИзвор:
Procedia Structural Integrity - 21st European Conference on Fracture, (Ecf21), 2016, 2, 753-760Издавач:
- Elsevier Science Bv, Amsterdam
Финансирање / пројекти:
- Микромеханички критеријуми оштећења и лома (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
Институција/група
Inovacioni centarTY - CONF AU - Younise, Bashir AU - Rakin, Marko AU - Gubeljak, Nenad AU - Međo, Bojan AU - Sedmak, Aleksandar PY - 2016 UR - https://machinery.mas.bg.ac.rs/handle/123456789/2344 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 C3 - Procedia Structural Integrity - 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 -
@conference{ 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 = "Procedia Structural Integrity - 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 Procedia Structural Integrity - 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 Procedia Structural Integrity - 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 Procedia Structural Integrity - 21st European Conference on Fracture, (Ecf21), 2 (2016):753-760, https://doi.org/10.1016/j.prostr.2016.06.097 . .