Finite Element Modelling of a Pair of Flexible Elements Contact Preloaded and Externally Loaded with an Arbitrary Force

Grzejda, Rafał

doi:10.12913/22998624/122196

Cited by 5 publications

(3 citation statements)

References 43 publications

(46 reference statements)

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“…Grzejda et al [22][23][24] studied the problem of multi-bolt connections in asymmetric structures, focusing on the effect of the tightening sequence on the preload. Grzejda 25 studied the contact problem of flexible primitives using the finite element method to develop mathematical and physical models describing the connection structure. Grzejda 26,27 studied the modelling and computation of the assembly process of asymmetric multibolt structures, and the problem of distributed pressures in the structure was investigated by means of two types of connection models.…”

Section: Introductionmentioning

confidence: 99%

Effect of tightening process parameters on the T-F curve of bolts in composite structures

Xuande,

Xiaogang,

Tao

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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Aircraft composite structures are widely joined using bolts. Differences in the tightening process parameters for tightening bolts can significantly affect the tightening torque (T)-preload (F) relationship. Some of the more significant process parameters include lubrication conditions, tightening speed, tightening area, sealant and washer. The experimental study compared the differences in T-F curves, friction coefficients, torque coefficients and yield preload during the tightening process for different values of the process parameters. The focus was on the state of the thread surface, the state of the bearing surface, the diffusion of the lubricating medium and sealant with preload, etc. The distribution of the T-F curve was obtained for all possible values of the process parameters. As the tightening speed increases, both the inter-thread friction coefficient and the macroscopic increase in the coefficient of friction on the bearing surface are observed when tightening the bolt head. The presence of sealant reduces the inter-thread friction coefficient. The size of the T-F curve area reflects the sensitivity of the bolt tightening process to the various process parameters. The size of the T-F curve area reflects the sensitivity of the bolt tightening process to the various process parameters.

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Section: Introductionmentioning

confidence: 99%

Effect of tightening process parameters on the T-F curve of bolts in composite structures

Xuande,

Xiaogang,

Tao

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…It was discovered that the tension was distributed more uniformly in joints with more rigid gaskets. Many papers have investigated the impact of various contact issues on the accuracy of the numerical solution [9][10][11]. Moreover, studies [12,13] analysed the influence of the rigidity of a gasket on the bolts' tension level caused by the increase in pressure of the sealed medium.…”

Section: Introductionmentioning

confidence: 99%

Methodology of Leakage Prediction in Gasketed Flange Joints at Pipeline Deformations

et al. 2022

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The paper presents the proposal of a leakage prediction method in flange joints, after pipeline deformation, based on FEM (Finite Element Methods). The stages of developing the design are discussed, and a complex, multi-stage method of applying the loads is presented in detail. Moreover, the gasket material data obtained in experiments were used. The paper also presents the results of calculations on a non-uniform stress distribution in the radial direction of the gasket. In addition, it has been shown that the deflection of the pipeline with a minor displacement causes an increase in the diversification of the circumferential pressure of the gasket, and also has a significant influence on the determination of the actual state of stress to which the gasket is subject. Moreover, it was found that the distribution of contact pressure on the deflection of the pipeline has a significant influence on the level of leakage. The results of tests are compared to the results of the numerical calculations of the stress in bolts. By comparing the bolt tension changes obtained by numerical and experiment analyses, it has been shown that the assumptions made in developing the numerical model are correct.

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“…It is one of the most accurate methods of this type [ 38 ]; therefore, it is also implemented in this article. The research described in this study can be used to verify the innovative method of modelling nonlinear asymmetric multi-bolted connections presented in [ 39 , 40 ].…”

Section: Introductionmentioning

confidence: 99%

Experimental Studies of an Asymmetric Multi-Bolted Connection under Monotonic Loads

2021

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This article describes the experimental studies of a preloaded asymmetric multi-bolted connection in the exploitation state. The construction of two stands were introduced: for bolt calibration and for evaluating the bolt forces in a multi-bolted connection. The bolts were tightened in a specific optimal sequence, in three passes, monitoring the force values in the bolts using a calibrated strain gauge measuring system. The studies were conducted for the selected multi-bolted connection on an Instron 8850 testing machine. The measurement data were saved in MATLAB R2018b Simulink. The measurement results were analysed statistically and are presented via charts showing the distributions of the normalised values of the bolt forces as a function of the linearly increasing and decreasing exploitation loads. We show that the forces in individual bolts, after unloading the multi-bolted connection, change in relation to the initial values of their preload.

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Finite Element Modelling of a Pair of Flexible Elements Contact Preloaded and Externally Loaded with an Arbitrary Force

Cited by 5 publications

References 43 publications

Effect of tightening process parameters on the T-F curve of bolts in composite structures

Effect of tightening process parameters on the T-F curve of bolts in composite structures

Methodology of Leakage Prediction in Gasketed Flange Joints at Pipeline Deformations

Experimental Studies of an Asymmetric Multi-Bolted Connection under Monotonic Loads

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