Welded joint geometry effect on fatigue crack growth resistance in different metallic materials. (September 2021)

• Record Type: Journal Article
• Authors: Sedmak, Aleksandar; Hemer, Abubkr; Sedmak, Simon A.; Milović, Ljubica; Grbović, Aleksandar; Čabrilo, Aleksandar; Kljajin, Milan
• Is Part Of: International journal of fatigue. Volume 150(2021)
• Publication Date: 2021-09
• Subjects: xFEM -- Welded joint geometry -- Fatigue crack growth rate -- Paris coefficients; Materials -- Fatigue -- Periodicals; Materials -- Fatigue; Periodicals; 620.1122
• DOI: 10.1016/j.ijfatigue.2021.106298
• Languages: English
• ISSNs: 0142-1123

Abstract

Highlights: Numerical simulation of fatigue crack growth through different welded joint regions. Comparison of steels with significantly different microstructures and applications. Development of a methodology which could be used for a wide variety of materials, in a relatively simple manners. Abstract: Fatigue crack growth through different welded joint regions was investigated, in terms of welded joint geometry and fatigue crack position. In the first phase of investigation, numerical simulation of crack growth in a welded joint made of steel P460NL1 was performed using extended Finite Element Methods (xFEM). Numerical models employed Paris law, using experimentally determined coefficients for each welded joint zone. Weld geometry was varied by using different heat affected zone (HAZ) widths, i.e. fatigue crack lengths. The second stage involved similar numerical models with different material (Protac 500). Fatigue lives for regions in both models were then compared.