Study on the critical loosening condition toward a new design guideline for bolted joints

Gong, Honghan; Liu, Jianhua; Ding, Xiaoyu

doi:10.1177/0954406218802928

Cited by 28 publications

(17 citation statements)

References 21 publications

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“…Gong et al [101] FEA Developed a novel simulation method, including two stages to clearly monitor the real rotation-induced loosening.…”

Section: Local Slippage Accumulation Theorymentioning

confidence: 99%

“…Gong et al [22,23] found that it was difficult to identify the critical transverse force for initiating loosening using a traditional finite element simulation owing to stress redistribution. Therefore, they developed a novel simulation method that included two stages to clearly monitor the real rotation-induced loosening [101]. In the first stage, a large transverse force was initially applied to accelerate the stress release/redistribution.…”

Section: Local Slippage Accumulation Theorymentioning

confidence: 99%

“…An important finding was related to the friction coefficients, which indicated that the bolted joint would not loosen when the two coefficients |www.Springer.com/journal/40544 | Friction http://friction.tsinghuajournals.com were significantly different from each other. In addition, Gong et al [101] evaluated various influencing factors, such as initial preload, frictional coefficients at the thread and bearing surfaces, clamped length, nominal diameter of the bolted joint, material type, and fit tolerance from the perspective of critical transverse force. The results indicated that the preload, frictional coefficients at the thread and bearing surfaces, clamped length, and fit tolerance were the prominent factors that affected loosening.…”

Section: Feamentioning

confidence: 99%

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Review of research on loosening of threaded fasteners

et al. 2021

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Loosening of threaded fasteners is a key failure mode, which is mainly caused by the slippage and friction behaviors on the thread and bearing surfaces, and will affect the integrity and reliability of products. Numerous scholars have conducted research on the loosening of threaded fasteners; however, comprehensive reviews on the loosening of threaded fasteners have been scarce. In this review article, we define loosening as a loss of preload and divide it into non-rotational and rotational loosening. The causes and mechanisms of non-rotational and rotational loosening are summarised. Some essential topics regarding loosening under transverse vibration have also attracted significant attention and have been investigated widely, including the loosening curve, critical condition of loosening, and influencing factors of loosening. The research carried out on these three topics is also summarised in this review. It is believed that our work will not only help new researchers quickly understand the state-of-the-art research on loosening, but also increase the knowledge of engineers on this critical subject. In the future, it is important to conduct more quantitative research on local slippage accumulation, and the relationship between local slippage accumulation and rotational loosening, which will have the potential to comprehensively unravel the loosening mechanism, and effectively guide the anti-loosening design of threaded fasteners.

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“…Gong et al [101] FEA Developed a novel simulation method, including two stages to clearly monitor the real rotation-induced loosening.…”

Section: Local Slippage Accumulation Theorymentioning

confidence: 99%

Section: Local Slippage Accumulation Theorymentioning

confidence: 99%

Section: Feamentioning

confidence: 99%

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Review of research on loosening of threaded fasteners

et al. 2021

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“…Baek [27] determined the loosening mechanism of threaded fasteners for complex structures through finite element analysis and experiments. Gong [28] has studied the key factors that affect the loosening of the bolted connection in the finite element analysis. The bolt model with the thread rise angle provided more detailed data for the analysis of the process of the loosened bolted connection, but the huge calculation caused by this can easily lead to the phenomenon of non-convergence in the analysis, which makes the finite element simulation analysis slightly insufficient in practical applications.…”

Section: Introductionmentioning

confidence: 99%

Loosening of Bolted Connections under Transverse Loading in Timber Structures

Chen

Wang

et al. 2020

Forests

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Bolted joints are widely used in timber structures, and the loosening of bolt connections will reduce the structural performance. In this paper, a mechanical model of bolt connection for timber structures is established, and the process of bolt loosening under a transverse load is investigated. By using the finite element method to construct an accurate thread model with a helix angle, the thread contact state during the bolt loosening procedure was analyzed in detail, and the factors such as load amplitude, load frequency, load location, and different timber materials on bolt loosening are also studied. In the timber structure, the load amplitude is the main factor affecting the bolt loosening, the decay rate of the preload in the bolted joint is positively correlated with the amplitude of the cyclic transverse load. The frequency of the loading has a smaller effect on the looseness, the preload decreases as the frequency increases. When the load is applied to the smooth rod part of the bolt, the preload force will decrease rapidly, and the distance between the load position and the bolt has no effect on the change in looseness. The decreasing range of the preload is different with different timber material, but the decreasing law is the same. The model can be applied to analyze the loosening rule of bolted connections in timber structures.

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“…e limit value of the safety margin is determined by the user. Gong and Liu developed a three-dimensional finite element model to investigate the effects of the preload generation, vibration parameter, and material model on the loosening [7] and identified the critical transverse force for initiating loosening [8]. Zhao et al [9] proposed a simplified numerical model of bolt slipping for simulating SJs and better capturing the slipping phenomenon.…”

Section: Introductionmentioning

confidence: 99%

Research on the Numerical Calculation Method for Antiloosening Performance of Screwed Joints under Complex Working Conditions

Yi-min

Guo

Qin

et al. 2020

Mathematical Problems in Engineering

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This study aimed at addressing the difficulties entailed in accurately determining the working loads of screwed joints (SJs) by establishing mechanical models and verifying the accuracy of the numerical calculation model of antiloosening performance under complex working conditions. First, considering the slip state of the interface and the stress state of the thread surface, a corresponding mechanical model was established to investigate the quantitative model of the interaction amongst structural parameters, complex working loads, and antiloosening performance of SJs. The applicability of existing models is expanded by this new model. Second, a load calibration test, an actual working condition test, and a dynamic simulation were combined to accurately determine the load under complex working conditions. A new experimental scheme for measuring the critical residual preload was employed to verify the reliability and accuracy of the numerical calculation model. The results confirmed that structural safety is ensured and that accident risk is reduced. Finally, based on this model, the transverse load, axial load, bending moment, torque about the bolt axis, clamping eccentricity, loading eccentricity, and coefficient of friction in the thread and at the interface were analyzed in terms of the antiloosening performance. The results of this study are expected to provide significant guidance to engineering practices. Moreover, the numerical calculation model can accurately predict the antiloosening performance and failure and also provide technical support for improving the structural reliability, particularly for key screwed-joint structures (SJSs), under complex working conditions loading.

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Study on the critical loosening condition toward a new design guideline for bolted joints

Cited by 28 publications

References 21 publications

Review of research on loosening of threaded fasteners

Review of research on loosening of threaded fasteners

Loosening of Bolted Connections under Transverse Loading in Timber Structures

Research on the Numerical Calculation Method for Antiloosening Performance of Screwed Joints under Complex Working Conditions

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