Fatigue life of an anchored blind-bolt loaded in tension

Tizani, Walid; Rahman, Norashidah Abd; Pitrakkos, Theodoros

doi:10.1016/j.jcsr.2013.10.002

Cited by 22 publications

(6 citation statements)

References 6 publications

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“…As the stress range increases, the number of cycles decreases, and steel hollow sections exhibit lower fatigue. According to Zhao et al [23] and Tizani et al [24], the endurance level of the structure decreases due to the effects of higher stress range values. Obviously, the notch depth influences the number of cycles.…”

Section: Stress Range and Number Of Cyclesmentioning

confidence: 99%

Fatigue of notched steel hollow sections under sinusoidal cyclic loading

Jaini,

Sugiura,

Sato

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

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This paper presents the numerical modelling of the fatigue of notched steel hollow sections under sinusoidal cyclic loading. Steel hollow sections are commonly used as structural components, particularly for beams, columns, girders, trusses and bracing. The biggest concern is flaws or minor cuts that create notches in the steel hollow sections. The presence of a notch could degrade the strength properties and consequently lead to severe disadvantages in fatigue life. The fatigue assessment was carried out using the finite element program WELSIM. SHS50×50×3.0 was selected for the three-dimensional model. The sinusoidal cyclic loading was applied with a minimum force of 1.665 kN and a maximum force ranging from 5.550 kN to 16.65 kN. Variables such as notch depth and amplitude ratio were simulated to acquire the stress range and the number of cycles. The results showed that the stress range for unnotched specimens is 46.258 MPa to 164.93 MPa; for notched specimens, it is 52.273 MPa to 189.89 MPa. It was found that the presence of a notch leads to an increase in the stress range and a decrease in the number of cycles. The unnotched specimens can withstand the number of cycles from 1.83×106 to infinity. Meanwhile, the number of cycles for notched specimens ranges from 1.20×106 to 8.36×107. At each amplitude ratio, except for A = 0.10, the number of cycles is insignificant.

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Section: Stress Range and Number Of Cyclesmentioning

confidence: 99%

Fatigue of notched steel hollow sections under sinusoidal cyclic loading

Jaini,

Sugiura,

Sato

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

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“…Loosening and fatigue failure of bolted joints are the two most important problems for vehicles that are subjected to vibration loading [ 1 ]. Abundant studies have demonstrated that self-loosening failure of bolts is mainly caused by dynamic transverse loading [ 2 , 3 , 4 , 5 , 6 ], and fatigue failure of bolts is usually caused by dynamic tensile loading [ 7 , 8 , 9 , 10 ]. However, transverse vibration can cause fatigue of bolted joints as well.…”

Section: Introductionmentioning

confidence: 99%

Multiaxial Fatigue Analysis of Connecting Bolt at High-Speed Train Axle Box under Structural Subharmonic Resonance

Feng,

Li,

Shu

et al. 2023

Sensors

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Based on the dynamic characteristics of the axle box front cover of high-speed trains in the subharmonic resonance state, the nonlinear single-degree-of-freedom (SDOF) model was proved to be reasonable, and reasons for the ineffectiveness of the common prevention methods for preventing bolt failure were analyzed firstly. Then, dynamic stress of the bolt was simulated by innovatively adopting the linear method based on frequency response analysis. The stress simulation method was verified to be practical under the subharmonic resonance state by analyzing and comparing the experimental and numerical results of the bolted front cover. It was proved that the linear method was accurate enough to simulate the dynamic stress of bolts, which is of great engineering significance. In addition to the transverse resonance stress of bolts caused by drastic vertical vibration of the front cover, the tensile resonance stress at the root of the first engaged thread was too large to be neglected on account of the first-order bending modes of bolts. Next, equivalent stress amplitude of the multiaxial stresses was obtained by means of the octahedral shear stress criterion. Finally, fatigue life of bolts was predicted in terms of S-N curve suitable for bolt fatigue life analysis. It argued that the bolts were prone to multiaxial fatigue failure when the front cover was in subharmonic resonance for more than 26.8 h, and the fatigue life of bolts could be greatly improved when the wheel polygonization was eliminated by shortening the wheel reprofiling interval.

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“…Numerous studies have been conducted to explore the fatigue properties of high-strength bolts, including research by Yang et al [3,5], Qiu et al [6], Jiao et al [7,8], Liu et al [9], Tizani et al [10], and Schaumann and Rasmus [11]. These works focused on factors influencing bolt fatigue properties, such as geometry, types, and surface heat treatment.…”

Section: Introductionmentioning

confidence: 99%

Investigating Fatigue Mechanisms and Crack Growth in 20mntib Steel High-Strength Bolts: An Experimental and Simulation Study

2023

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In this paper, axial-tensile, constant-amplitude fatigue experiments are performed on M24 high-strength bolts with grade 8.8 fabricated from 20MnTiB steel with a stress ratio (R) of 0.3, and their crack development is simulated. The stress range-fatigue life (S–N) curve is derived by using the experimental results. The fatigue mechanism is then investigated through strain and fractographic analyses. Moreover, the extended finite element method (XFEM) is applied for assessing the fatigue crack propagation behavior of the high-strength bolts. The findings reveal that the 20MnTiB steel bolt exhibits a threshold fatigue strength of 140.77 MPa at two million loading cycles, which is 1.68 times greater than the corresponding value for 35K steel bolts at the same stress ratio. The bolt's stable deformation stage constitutes 87% of its total fatigue life. The XFEM is capable of accurately predicting the fatigue crack propagation trajectory and the lifespan of the high-strength bolts. Our analysis indicates that the crack initially propagates predominantly along the bolt's circumferential direction, accounting for 85% of the overall crack propagation life, before transitioning to unstable growth and experiencing an exponential increase in length.

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Fatigue life of an anchored blind-bolt loaded in tension

Cited by 22 publications

References 6 publications

Fatigue of notched steel hollow sections under sinusoidal cyclic loading

Fatigue of notched steel hollow sections under sinusoidal cyclic loading

Multiaxial Fatigue Analysis of Connecting Bolt at High-Speed Train Axle Box under Structural Subharmonic Resonance

Investigating Fatigue Mechanisms and Crack Growth in 20mntib Steel High-Strength Bolts: An Experimental and Simulation Study

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