Study of Two-Stage Tightening of Threaded Fasteners Using Various Tool Speed Combinations

Ganeshmurthy, Saravanan; Nassar, Sayed A.

doi:10.1115/pvp2007-26719

Cited by 4 publications

(2 citation statements)

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“…Guessous et al 17 studied the temperature effect during bolt tightening and its influence on the friction surface quality and wear. Ganeshmurthy and Nassar 18 analyzed the two-stage bolt tightening problem.…”

Section: Research Backgroundmentioning

confidence: 99%

Research on the relationship between the tightening torque and the preload of composite bolted structures

Yue

Xie

Liu

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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Bolted joints are widely used in assembly of composite structures that transmit large loads. The relationship between torque ( T) and preload ( F) is needed to be obtained when using the torque method to tighten bolts. In this paper, the T- F relationship in the process of bolt tightening composite laminates was analyzed through bolt tightening experiments. The variation behavior of friction coefficient in this process was also studied. On this basis, a progressive damage finite element model was established using the improved LaRC05 criterion to analyze the stress and damage of the composite laminate during tightening. The various stages in the bolt tightening were divided and the mechanical properties of each stage were analyzed. The results of the study showed that the thread friction coefficient μth and the bearing friction coefficient μb change with the preload during the tightening process. Its behavior can be described using an exponential function. Serious stress concentration and assembly damage can be formed in the direct extrusion area of the outer edge of the locknut when the composite laminate is bolted. The bolt tightening process of composite laminates can be divided into five stages. Research conclusions are valuable for understanding composite structures and formulating the bolt tightening process.

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Section: Research Backgroundmentioning

confidence: 99%

Research on the relationship between the tightening torque and the preload of composite bolted structures

Yue

Xie

Liu

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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show abstract

“…Guessous et al 22 studied the temperature effect during bolt tightening and its effect on the quality of the friction surface and wear conditions. Ganeshmurthy and Nassar 23 analysed the problem of two-stage tightening of bolts and studied the effect of different tightening speeds on the friction and torque coefficients.…”

Section: Introductionmentioning

confidence: 99%

Analysis and determination of bolt tightening process factors for composite structures under multiple working conditions

Yue

Xie

Liu

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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When developing the tightening process for composite bolts, ensuring that the target preload( F) required by design is achieved is a key scientific issue in meeting the mechanical properties of the connected structure. Variations in complex process factors during tightening have a large effect on the tightening torque( T)-preload curve( F), and the mechanism by which the tightening process factor affects the target preload must be considered. Using experimental means, the significance and coupling effects of tightening speed, lubrication conditions, tightening areas, joint sealants and washers have been systematically investigated. The tightening torque( T), torque coefficient( K), preload( F) and the peak stress coefficients X( σ) and interlaminar stress coefficients Y( σ) within the composite laminate are used as the main response variables, and a mathematical model between each response variable and the process factor is established to analyse the effect of significant factors on the response variables from a quantitative perspective. Finally, with a certain size of preload( F) as the optimisation target, the optimisation analysis of the tightening speed is carried out for four working conditions with different sealing conditions and different tightening area, and the optimum tightening speed for each working condition is determined. Based on the above study, an analytical method was proposed to determine the reasonable interval of tightening process parameters in this paper.

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Study on the Load Conversion of Bolt-Nut Fasteners between Tightening and Service Conditions

Liu

et al. 2021

Exp Tech

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Study of Two-Stage Tightening of Threaded Fasteners Using Various Tool Speed Combinations

Cited by 4 publications

References 0 publications

Research on the relationship between the tightening torque and the preload of composite bolted structures

Research on the relationship between the tightening torque and the preload of composite bolted structures

Analysis and determination of bolt tightening process factors for composite structures under multiple working conditions

Study on the Load Conversion of Bolt-Nut Fasteners between Tightening and Service Conditions

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