Vol. 20, No. 3, pp. 222-231 (2024)
UNIFIED FATIGUE LIFE CALCULATION OF Q460C STEEL FILLET WELD
CRUCIFORM JOINTS CONSIDERING FATIGUE CRACK INITIATION AND PROPAGATION
Wan-Zhen Wang 1, Zhi-Yu Jie 1, *, Guo-Ji Yu 2, Lin-Feng Xiao 3 and Yu-Zhe Fan 1
1 School of Civil Engineering, Geography and Environment, Ningbo University, Ningbo 315211, China
2 Hongrun Construction Group Co., Ltd, Shanghai 200235, China
3 Ningbo Huacong Architecture Design & Research Institute Co., Ltd, Ningbo 315042, China
*(Corresponding author: E-mail:This email address is being protected from spambots. You need JavaScript enabled to view it.)
Received: 13 November 2023; Revised:7 February 2024; Accepted: 16 February 2024
DOI:10.18057/IJASC.2024.20.3.2
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ABSTRACT
The present study experimentally investigates the effects of the relative stress amplitude and the relative nominal maximum stress on the fatigue life of Q460C steel fillet weld cruciform joints. An ellipsoidal fracture model proposed by the first author is used as the criterion of crack tip cracking and fatigue crack instability propagation. Theoretical calculations and numerical simulations were employed to analyze the fatigue crack initiation and propagation in the fillet weld cruciform joint. In addition, the fatigue crack initiation life, stable propagation life and total fatigue life were predicted using a unified fatigue life calculation model proposed by the first author. The calculation results reveal that the proposed unified fatigue life calculation model yield accurate fatigue life estimations, with errors ranging from −12.8% to −0.4%. Conversely, the calculation errors of the fatigue life formulas recommended in GB50017-2017, Eurocode3, and AISC360 range from −64.4% to −8.0%, −72.5% to −29.1%, and −49.4% to +30.7%, respectively.
KEYWORDS
Fillet weld, Fatigue test, Initiation life, Stable propagation life, Unified fatigue life calculation model
REFERENCES
[1] Araujo LC, Malcher L, Oliveira D, et al. A new multiaxial fatigue endurance model for high strength steels taking into account the presence of small defects. Int J Fatigue 2024;178:107981.
[2] Skriko T, Lipiäinen K, Ahola A, et al. Fatigue strength of longitudinal load-carrying welds in beams made of ultra-high-strength steel. J Constr Steel Res 2021;179:106563.
[3] Skriko T, Ghafouri M, Bjoerk T. Fatigue strength of TIG-dressed ultra-high-strength steel fillet weld joints at high stress ratio. Int J Fatigue 2017; 94: 110–120.
[4] Tong LW, Niu LC, Ren ZZ, et al. Experimental investigation on fatigue behavior of butt-welded high-strength steel plates. Thin Wall Struct 2021;165:107956.
[5] Tong LW, Niu LC, Ren ZZ, et al. Experimental research on fatigue performance of high-strength structural steel series. J Constr Steel Res 2021; 183:106743.
[6] Wang WZ, Shi WZ, Li B, et al. High-cycle fatigue life assessment of welded cruciform joints of Q460D steel. Struct 2023;57(11):105163.
[7] Lv FJ, Wang WZ, Zhao W. Fatigue test and unified fatigue life calculation of Q460C steel notched plates. Build 2023;13(3):697.
[8] Jie ZY, Wang WJ, Zhuge P, et al. Fatigue performance of inclined cruciform welded joints with artificial pits. Adv Steel Constr 2021;17(1):20–27.
[9] Guo T, Liu ZX, Zhu JS. Fatigue reliability assessment of orthotropic steel bridge decks based on probabilistic multi-scale finite element analysis. Adv Steel Constr 2015;11(3):334–346.
[10] Lipiäinen K, Ahola A, Virolainen E, Hirvi A, et al. Fatigue strength of hot-dip galvanized S960 cut edges and longitudinal welds. J. Constr. Steel Res 2022;189:, 107083.
[11] Ahola A, Skriko T, Lipiäinen K, et al. On the weld root fatigue strength and improvement techniques for non-load-carrying transverse attachment joints with single-sided fillet welds and made of mild and ultra-high-strength steels. Eng Struct 2021; 249:113373.
[12] Yue YN, Shuling Gao SL, Li N, et al. High-cycle fatigue performance of corroded Q690E high strength steel and Q690qENH high-strength weathering steel. Constr and Build Mater 2023;401:132835.
[13] Sui GY, Wang ZQ, Li JR, et al. Roles of microstructures in high-cycle fatigue behaviors of 42CrMo high-strength steel under near-yield mean stress. Int J Fatigue 2023;177:107928.
[14] Zhang Y, Sang XG, Xu GT, et al. Fatigue crack propagation of the gradient surface-modified layer of high-strength steel. Int J Fatigue 2023;177:107921.
[15] Fang L, Fu ZQ, Ji, BH, et al. Propagation mode and characteristics of fatigue crack in steel bridge deck after drilling ahead of the crack tip. Adv Steel Constr 2022;18(2):544–551.
[16] Yamada K, Ishikawa T, Kakiichi T. Rehabilitation and improvement of fatigue life of welded joints by ICR treament. Adv Steel Constr 2015;11(3):2944–551.
[17] Neuber H. Theory of stress concentration for shear-strained prismatic bodies with arbitrary nonlinear stress-strain law. J App Mech 1961;28:544–550.
[18] Paris PC, Erdogan F. A critical analysis of crack growth laws. J Bas Eng 1963;85D:528–534.
[19] GB50017-2017, Standard for design of steel structures, Architecture Industrial Press of China, Beijing, China, 2017. (in Chinese)
[20] AISC-360-05, Specification for structural steel buildings, American Institute of Steel Construction, Chicago, 2005.
[21] Eurocode3-2005, EN 1993-1-9, Design of steel structures-fatigue strength of steel structures, British Standards Institution, London, 2005.
[22] Wang WZ. Crack criterion and fracture tests of structural steel. Eng Mech 2008;25:27–31. (in Chinese).
[23] Wang WZ. Calculation model of fatigue crack initiation life and fatigue life calculation of Q460C steel notched plates. Mater Rev 2024;38(4):23010056. (in Chinese).
[24] Wang WZ. Fatigue failure model of Q345 steel round bars. J Harb Inst Technol 2019;51: 58–64. (in Chinese).
[25] GB/T3075-2008, Metallic materials-fatigue testing-axial-force-controlled method, Standards Press of China, Beijing, 2008. (in Chinese)
[26] Wang WZ, Qian XD, Su RQ, et al. Tensile tests and analyses of notched specimens fabricated from high strength steels using a generalized yield model. Fatigue Fract Eng Mat Struct 2010;33:310–319.