Unified fatigue life prediction of bolts with different sizes and lengths under various axial loading conditions

Nam, Juhyun; Kim, Dong-Won; Kim, Kyungjae; Choi, Seong Hee; Oh, Je Hoon

doi:10.1016/j.engfailanal.2021.105841

Cited by 13 publications

(4 citation statements)

References 25 publications

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“…Bolted flanged connections are widely used in industry, agriculture and national defense construction, and the main failure type is leakage (Dong et al , 2022; Nam et al , 2022; Mourya et al , 2015; Marek et al , 2022; Jaszak, 2021; Cao et al , 2021). The gasket is the core component of the bolted flanged connections.…”

Section: Introductionmentioning

confidence: 99%

Study on life distribution and prediction method of flexible graphite composite reinforced gasket

Zhang,

Shao,

Kong

et al. 2023

ILT

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Purpose This paper aims to prevent gasket sealing failure in engineering, accurately predict gasket life, extend system life and improve sealing reliability. The accelerated life test method of flexible graphite composite–reinforced gaskets is established, the life distribution law of flexible graphite composite–reinforced gaskets is revealed, and the life prediction method of flexible graphite composite–reinforced gaskets with different allowable leakage rates is proposed, which can provide a reference for the life prediction of other types of gaskets. Design/methodology/approach In this study, flexible graphite composite–reinforced gaskets were tested for long-term high-temperature sealing performance on a multi-sample gasket accelerated life test rig. The data were also analyzed using the least squares method and the K-S hypothesis calibration method. A gasket time-dependent leakage model and an accelerated life model were also developed. Constant stress-accelerated life tests were conducted on flexible graphite composite–reinforced gaskets. On this basis, a gasket life prediction method at different allowable leakage rates was proposed. Findings The life distribution law of flexible graphite composite–reinforced gaskets is revealed. The results show that the life of the gasket obeys the Weibull distribution. The time-correlated leakage model and accelerated life model of the gasket were established. And the accelerated life test method of the flexible graphite composite–reinforced gasket was established. The life distribution parameters, accelerated life model parameters and life estimates of gaskets were obtained through tests. On this basis, a gasket life prediction method under different leakage rates was proposed, which can be used as a reference for other types of gaskets. Practical implications The research in this paper can better provide guidance for the use and replacement of gaskets in the project, which is also very meaningful for predicting the leakage condition of gaskets in the bolted flange connection system and taking corresponding control measures to reduce energy waste and pollution and ensure the safe operation of industrial equipment. Originality/value A multi-specimen gasket-accelerated life test device has been developed, and the design parameters of the device have reached the international advanced level. The life distribution law of the flexible graphite composite–reinforced gasket was revealed. The accelerated life test method for the flexible graphite composite–reinforced gasket was established. The life prediction method of the flexible graphite composite–reinforced gasket under different allowable leakage rates was proposed. Peer review The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-08-2023-0254/

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Section: Introductionmentioning

confidence: 99%

Study on life distribution and prediction method of flexible graphite composite reinforced gasket

Zhang,

Shao,

Kong

et al. 2023

ILT

View full text Add to dashboard Cite

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“…Nam et al investigated a novel method to construct a unified stress-life (S-N) curve that was proposed for the three different bolts with different sizes and lengths subjected to various external axial loading conditions and preloads, ranging from 44% to 88% of the ultimate tensile stress [6]. Maljaars and Euler drew on a large number of fatigue tests to assess bolts and bolted connections, which revealed the possibility to improve current design specifications [7].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of Constant-Amplitude Fatigue Performance of M39 High-Strength Bolts in Grid Structures with Bolt-Sphere Joints

Zhou

Lei

et al. 2022

Mobile Information Systems

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Grid structures with bolt-sphere joints are widely used in industrial plants. With the installation of suspension cranes, high-strength bolts are subjected to repeated alternating loads and cause fatigue problems. Due to their dispersive nature, the degree of difficulty and cost of fatigue tests are extremely high. Due to the lack of a recognized fatigue design method, engineering designers have encountered great difficulties, and the promotion and application of such methods are severely restricted. In this paper, we successfully implemented a constant-amplitude fatigue test of M39 high-strength bolt specimens on an American MTS Landmark 370.50 fatigue testing machine and obtained the corresponding S-N curve from the statistical analysis of the test data. Using the nominal stress amplitude Δσ and the hot point stress amplitude Δσk as the design parameters, we established a corresponding constant-amplitude fatigue design method. We performed a microscopic analysis of the fracture surface using a TESCAN Mira3 LMH scanning electron microscope and revealed the fatigue failure mechanism of the high-strength bolts.

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“…To date, many studies have investigated the fatigue of bolts. For example, Nam [1] studied the fatigue life of bolts with different dimensions under axial loading. Maljaars [2] improved the relevant specifications after analyzing a large amount of data from bolt fatigue tests.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Variable-Amplitude Fatigue Performance of M60 High-Strength Bolts of Grid Structures with Bolted Spherical Joints

et al. 2022

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The high-strength bolts of grid structures with bolted spherical joints under the action of suspension cranes are at risk of severe fatigue failure. Thus, this paper studies the variable-amplitude fatigue performance of M60 high-strength bolts. The test results for eight specimens in four loading modes are obtained using an Amsler fatigue testing machine. The fatigue life is also estimated based on Miner and Corten–Dolan’s theories, and the applicability of Corten–Dolan’s theory is verified. The fracture induced by the variable-amplitude fatigue is microscopically analyzed using scanning electron microscopy (SEM), revealing the mechanism of the variable-amplitude fatigue failure. Our findings provide valuable experimental data supporting the fatigue life estimation of grid structures with bolted spherical joints in service.

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Unified fatigue life prediction of bolts with different sizes and lengths under various axial loading conditions

Cited by 13 publications

References 25 publications

Study on life distribution and prediction method of flexible graphite composite reinforced gasket

Study on life distribution and prediction method of flexible graphite composite reinforced gasket

Experimental Study of Constant-Amplitude Fatigue Performance of M39 High-Strength Bolts in Grid Structures with Bolt-Sphere Joints

Experimental Study on Variable-Amplitude Fatigue Performance of M60 High-Strength Bolts of Grid Structures with Bolted Spherical Joints

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