Constant-amplitude fatigue behavior of M24 high-strength bolt of end-plate flange connection

Jiao, Jinfeng; Liu, Zhanxiang; Guo, Qianqian; Liu, Yong; Lei, Honggang

doi:10.1016/j.istruc.2021.08.108

Cited by 24 publications

(8 citation statements)

References 27 publications

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“…At present, the research on the fatigue of bolts is focused on the whole life cycle, and the research on the fatigue crack initiation and fatigue crack propagation of high-strength bolts is rarely reported. By constant amplitude fatigue test, the effects of stress ratio (the ratio of the minimum stress to the maximum stress during the cyclic loading on the bolt), stress amplitude, pre-tightening force, and bolt grade on the fatigue properties of high- strength bolts have been studied by Xu Yazhou, 16 Shen Yu, 17 Yang, 18 Jiao, 19 MALJAARS. 20 In their research, the macro-morphology of bolt fracture was analyzed, the S-N curve was fitted, and the fatigue life formula was given.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation and experimental verification of fatigue crack propagation in high-strength bolts based on fracture mechanics

Zhang,

Li,

Zhao

et al. 2023

Science Progress

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To investigate the fatigue crack propagation behavior of high-strength bolts for high-speed train brake discs, the fatigue crack propagation of high-strength bolts with initial defects under various load ratios was numerically simulated and experimentally verified based on fracture mechanics in this paper. Firstly, the fracture mechanics model of a three-dimensional hexahedral mesh with initial root defects was established using ABAQUS-FRANC3D interactive technology. Then the stress intensity factor (SIF) of the crack front was calculated by the stress superposition of the crack surface to simulate the coupling effect of preload and axial cyclic load. Based on it, fatigue crack propagation was simulated. Finally, the corresponding fatigue experiments on prefabricated crack bolts were carried out. The results show that mode I cracks dominate in the process of crack propagation. The stable crack propagation zones of the fractured high-strength bolts all show a semi-elliptical cross-section. The SIF of the crack front decreases with the increase of the load ratio, thus making the crack propagation life increase with the increase of the load ratio. The experimental outcomes are in great agreement with the simulation results, which verify that the numerical simulation method can effectively and accurately evaluate the fatigue life of high-strength bolts with initial defects and provides an effective means for predicting the fatigue crack propagation life of the same type high-strength bolts in engineering applications.

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Section: Introductionmentioning

confidence: 99%

Numerical simulation and experimental verification of fatigue crack propagation in high-strength bolts based on fracture mechanics

Zhang,

Li,

Zhao

et al. 2023

Science Progress

View full text Add to dashboard Cite

show abstract

“…At present, the fatigue research on bolts is mostly focused on the whole fatigue life cycle and the fatigue crack initiation stage. By constant amplitude fatigue test, the effects of stress ratio, stress amplitude, pre-tightening force, and bolt grade on the fatigue properties of high-strength bolts have been studied by Xu Yazhou 15 , Shen Yu 16 , Yang 17 , Jiao 18 , and Maljaars 19 . In their research, the macro-morphology of bolt fracture was analyzed, the S–N curve was fitted, and the fatigue life formula was given.…”

Section: Introductionmentioning

confidence: 99%

Crack propagation analysis and fatigue life assessment of high-strength bolts based on fracture mechanics

Zhang,

Li,

Zhao

et al. 2023

Sci Rep

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To investigate the effect of initial cracks on the fatigue performance of high-strength bolts for high-speed train brake discs, the fatigue crack propagation behavior of high-strength bolts under the coupling action of preload and dynamic fatigue load was investigated experimentally and numerically based on the theory of linear elastic fracture mechanics. Firstly, fatigue tests of high-strength bolts with initial crack defects were carried out, and then a three-dimensional accurate numerical model with the hexahedral mesh for a bolt-nut was established by MATLAB, and the fatigue crack propagation behaviors were investigated using ABAQUS-FRANC3D interactive technology. In this paper, the effects of the initial crack state, the bolt preload, the axial excitation load, and the friction coefficient of the screw pair on crack propagation life were emphatically studied, and the simulated crack propagation trajectory and crack propagation life agreed well with the experimental results. The findings indicated that 0°-oriented cracks beginning at the maximum principal stress were predicted to have the shortest fatigue life. The crack propagation life was sensitive to the initial crack size, the coefficient of initial crack geometry, and the bolt preload, but not to the friction coefficient of the screw pair. Furthermore, when evaluating the effect of fatigue load on crack propagation, the load ratio, the mean load, and the load range should all be considered.

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“…High-strength bolts have the characteristics of a simple installation, stable quality, high construction efficiency, and convenient disassembly. They have become the main connection method for steel structures [ 1 , 2 , 3 , 4 ]. However, when they are applied to extremely harsh environments, such as cross-sea bridges, offshore platforms, offshore wind power, and petrochemicals, they will face the risk of corrosion and damage [ 5 , 6 , 7 ].…”

Section: Introductionmentioning

confidence: 99%

A Study on the Fatigue Performance and Corrosion Resistance of 304/45 Bimetallic Composite Bolts

Zhou

Ding

2023

Materials

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This paper utilized a hot-rolling process to produce composite rods and subsequently manufactured 304/45 composite bolts through the process of drawing and thread rolling. The study focused on examining the microstructure, fatigue performance, and corrosion resistance of these composite bolts. Additionally, the impacts of quenching and tempering on the fatigue performance of the composite bolts were explored and compared to the performance of 304 stainless steel (SS) bolts and Grade 6.8 35K carbon steel (CS) bolts. The results indicate that the SS cladding of the cold-worked 304/45 composite (304/45-CW) bolts was primarily strengthened by the cold deformation mechanism, which resulted in high microhardness, averaging 474 HV. At a maximum surface bending stress of 300 MPa, the fatigue cycles of the 304/45-CW reached 342,600 cycles at a 63.2% failure probability, which was significantly higher than that of commercial 35K CS bolts. The S-N fatigue curves showed that the fatigue strength of the 304/45-CW bolts was approximately 240 MPa, but the fatigue strength of the quenched and tempered 304/45 composite (304/45-QT) bolts decreased significantly to 85 MPa, due to the loss of the cold deformation strengthening effect. The corrosion resistance of the SS cladding of the 304/45-CW bolts was impressive and remained largely unaffected by carbon element diffusion.

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Constant-amplitude fatigue behavior of M24 high-strength bolt of end-plate flange connection

Cited by 24 publications

References 27 publications

Numerical simulation and experimental verification of fatigue crack propagation in high-strength bolts based on fracture mechanics

Numerical simulation and experimental verification of fatigue crack propagation in high-strength bolts based on fracture mechanics

Crack propagation analysis and fatigue life assessment of high-strength bolts based on fracture mechanics

A Study on the Fatigue Performance and Corrosion Resistance of 304/45 Bimetallic Composite Bolts

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