Self-loosening effects on vibration characteristics of plates with bolted joints: An experimental and finite element analysis

Pirdayr, Abouzar; Mohammadi, M; Kazemzadeh-Parsi, Mohammad Javad; Rajabi, Majid

doi:10.1016/j.measurement.2021.109922

Cited by 29 publications

(6 citation statements)

References 33 publications

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“…However, this method is suitable for global damage detection; thus, it cannot be effectively utilized for detecting localized looseness in bolted joints. 66 Pirdayr et al 57 reported that signal parameters such as signal energy, kurtosis, and standard deviation are more significant in detecting multi-bolt looseness than natural frequency. These limitations bolster the implementation of PZT transducers for looseness detection in bolted connections.…”

Section: Discussion and Future Scopementioning

confidence: 99%

Review on recent advances in structural health monitoring paradigm for looseness detection in bolted assemblies

Chelimilla

Chinthapenta

Kali

et al. 2023

Structural Health Monitoring

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The integrity of bolted joints is still a challenging problem owing to the gross or localized slip at the interfacial surfaces of the joints when subjected to external disturbances such as vibrations. This slip escalates the interfacial movement and, thus, leads to a decrease in preload levels, that is, looseness of the bolted assemblies. In the last decade, modal analysis, wave propagation, and percussion methods were traditionally used to detect looseness in bolted connections. With an increase in computational power, machine learning algorithms such as neural networks, random forests, decision trees, and support vector machines complemented the traditional methods in accurate looseness estimation. Subsequently, this integration paved the path for real-time health monitoring of bolted joints. This paper summarizes recent investigations on looseness detection in bolted assemblies based on traditional methods and machine learning algorithms. The working principle, advantages, challenges, and applications of the aforementioned methods are also detailed in this paper. Apart from these investigations, the latest studies on the Internet of Things-based health monitoring of structures are also reviewed to explore their adaptability in remote monitoring of bolted connections for damage detection in the future.

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Section: Discussion and Future Scopementioning

confidence: 99%

Review on recent advances in structural health monitoring paradigm for looseness detection in bolted assemblies

Chelimilla

Chinthapenta

Kali

et al. 2023

Structural Health Monitoring

View full text Add to dashboard Cite

show abstract

“…The rotation effects, such as centrifugal effect, initial tension, gyro moment and geometric nonlinearity caused by large deformation, are considered. Pirdayr et al [27] studied the vibration characteristics of six bolt connecting plates by using test and finite element methods. Consider the influence of bolt looseness on vibration characteristics.…”

Section: Introductionmentioning

confidence: 99%

Influence of Non-uniform Parameter of Bolt Joint on Complexity of Frequency Characteristics of Cylindrical Shell

Tang

She

et al. 2023

Chin. J. Mech. Eng.

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Bolt connection is one of the main fixing methods of cylindrical shell structures. A typical bolted connection model is considered as a tuned system. However, in the actual working conditions, due to the manufacturing error, installation error and uneven materials of bolts, there are always random errors between different bolts. To investigate the influence of non-uniform parameters of bolt joint, including the stiffness and the distribution position, on frequency complexity characteristics of cylindrical shell through a statistical method is the main aim of this paper. The bolted joints considered here were simplified as a series of springs with random features. The vibration equation of the bolted joined cylindrical shell was derived based on Sanders’ thin shell theory. The Monte Carlo simulation and statistical theory were applied to the statistical analysis of mode characteristics of the system. First, the frequency and mode shape of the tuned system were investigated and compared with FEM. Then, the effect of the random distribution and the random constraint stiffness of the bolts on the frequency and mode shape were studied. And the statistical analysis on the natural frequencies was evaluated for different mistuned levels. And some special cases were presented to help understand the effect of random mistuning. This research introduces random theory into the modeling of bolted joints and proposes a reference result to interpret the complexity of the modal characteristics of cylindrical shells with non-uniform parameters of bolt joints.

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“…Dravid et al revealed an influence of washer on self-loosening of bolted joints (18) . With experiments and FEM analysis, Pirdayr et al showed an influence of vibration on self-loosening of screws (19) . Zhao et al conducted research on the effect of the initial tightening force and contact states on the load change relation (20) .…”

Section: Introductionmentioning

confidence: 99%

Influences of Various Parameters on Shear Stiffness of Bolted Joint Subjected to Shear Load

Murai¹,

Watanabe²,

Fukuda³

et al. 2023

Preprint

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Multi-material structures have been required to reduce weight of vehicles in order to improve fuel efficiencies. To realize multi-material structures effectively, we have to select not only the optimum material for each structure but also the optimum joining techniques for each joint. Bolted joints are one of the most popular methods to join dissimilar materials. Various characteristics for the bolted joints had been revealed in the literatures. Especially self-loosening characteristics of bolted joints subjected to shear cyclic load have been still investigated. However it has not been sufficiently investigated which parameters effect on shear stiffness of bolted joints which is subjected to shear load. When two plates are joined by a bolt and a nut, it is important for functionally designing machines to know if the shear stiffness of the joining point is the same as the plate stiffness or not and if the stiffness changes or not. In this study, we have revealed experimentally and analytically the shear stiffness characteristics of bolted joints and which parameters determine the shear stiffness. Washers with different contact areas to the clamped plates were used in the experiments. The results showed that the shear stiffness of bolted joints increases with an increase in the contact area size between washers and clamped parts. The result indicates that the shear stiffness of bolted joint is mainly determined by the bending stiffness that is an easiness of bolted joints to rotate due to shear tensile force rather than the clamping force. But if the slippage occurs between the clamped plates, the shear stiffness of bolted joint markedly decreases. The results also showed that the tensile force with which the clamped plates begin to slip between them depends on the clamp force of bolted joints and the contact area size between the clamped plate and the washers.

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Self-loosening effects on vibration characteristics of plates with bolted joints: An experimental and finite element analysis

Cited by 29 publications

References 33 publications

Review on recent advances in structural health monitoring paradigm for looseness detection in bolted assemblies

Review on recent advances in structural health monitoring paradigm for looseness detection in bolted assemblies

Influence of Non-uniform Parameter of Bolt Joint on Complexity of Frequency Characteristics of Cylindrical Shell

Influences of Various Parameters on Shear Stiffness of Bolted Joint Subjected to Shear Load

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