Numerical Simulation of Self-Loosening of Bolted Joints under Cyclic Transverse Loads

Hou, Shi Yuan; Liao, Ri Dong

doi:10.4028/www.scientific.net/amm.487.488

Cited by 9 publications

(3 citation statements)

References 10 publications

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“…It was found that loosening was more difficult to occur under a fine thread, small excitation amplitude and initial preload, and large thread and bearing friction coefficients. Hou and Liao [115] investigated the effect of increment step size, initial clamping force, amplitude of the shear load, thread tolerance, and friction coefficients on the loosening process. 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.…”

Section: Feamentioning

confidence: 99%

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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Section: Feamentioning

confidence: 99%

Review of research on loosening of threaded fasteners

et al. 2021

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“…The loosening of bolted joint structures is affected by a variety of uncertainties, such as structural dimensions, external loads, and service environment. In recent years, scholars at home and abroad have studied the loosening behaviour, loosening mechanism, and anti-loosening methods of bolted structures by various means such as loosening test and finite element simulation [4][5][6][7], and some key results have been obtained. Still, no report has been reported on the systematic summarization of these research results.…”

Section: Introductionmentioning

confidence: 99%

Research Progress on Influencing Factors of Bolted Joint Structure Loosening

You,

Liu,

Chen

et al. 2024

J. Phys.: Conf. Ser.

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Loosening of bolted joint structure is a critical failure mode mainly caused by the slippage and friction behaviours on the thread and bearing surfaces. Domestic and foreign scholars have conducted a series of studies on the loosening mechanism and anti-loosening methods of bolted joint structures; however, there are fewer summaries on the influencing factors of loosening of bolted joint structures. This paper takes the phenomenon of loosening of bolted joint structure as the research object, summarizes the research method of loosening of bolt joint structure and the influencing factors, and summarizes the influencing law of loosening of bolted joint structure in four aspects, namely, preload force, external load factors, structural factors, and operating temperature, to provide references for the design of anti-loosening of bolted joint structure.

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“…Quasi-static simulation of vibration frequency was usually applied in the FEA, 9–11 which assumed that the magnitude of vibration frequency would not affect the loosening behavior. However, there were also researches 15 showing that vibration frequency had an important effect on the loosening behavior. This result contradicted the quasi-static assumption.…”

Section: Introductionmentioning

confidence: 99%

Some factors affecting the loosening failure of bolted joints under vibration using finite element analysis

Gong

Liu

2017

Proceedings of the Institution of Mechanical Engineers, Part C:

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Finite element analysis has been regarded as an effective research method for analyzing the loosening failure of bolted joints under vibration. However, there exist some factors, which influence the accuracy and reliability of loosening results, thus determining the explanations of the loosening mechanism. In this study, a 3D finite element model of a typical bolted joint was built to investigate the effects of several different factors on the loosening under transverse vibration loading. These influencing factors include preload generation, vibration parameter, and material model. Based on the simulation results, it was found that applying the method of pretension element to generate preload instead of the actual method of torque was reliable and efficient. For the vibration parameter, it showed that the decrease rate in preload was higher for a larger vibration amplitude. But once the bearing surface reached complete slip, the loosening rate would keep constant. This was because the thread surface at that time reached a sticking state. Vibration frequency was proved to have no effect on the loosening behavior. This result demonstrated that the quasi-static assumption for vibration frequency was reasonable. Additionally, it also indicated that plastic material models only affected the preload loss in the initial several vibration cycles and had no influence on the loosening rate of preload after several vibration cycles. Finally, experiments were conducted to confirm qualitatively the results obtained based on finite element analysis.

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Numerical Simulation of Self-Loosening of Bolted Joints under Cyclic Transverse Loads

Cited by 9 publications

References 10 publications

Review of research on loosening of threaded fasteners

Review of research on loosening of threaded fasteners

Research Progress on Influencing Factors of Bolted Joint Structure Loosening

Some factors affecting the loosening failure of bolted joints under vibration using finite element analysis

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