Non-linearity of the contact layer between elements joined in a multi-bolted connection and the preload of the bolts

Grzejda, Rafał

doi:10.19206/ce-2016-201

Cited by 5 publications

(3 citation statements)

References 8 publications

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“…According to VDI 2230, multiple bolted connections are also recommended to be solved using FEM. The FEM simulation verified by the experiment is included, for example, in [14][15][16].…”

Section: Bolted Connectionsmentioning

confidence: 99%

Unsymmetrically Distributed Bolt Axial Forces between Symmetrically Spaced Bolts of Clamping Sleeve

Hruzik,

Struz,

Trochta

et al. 2023

Symmetry

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This article deals with the uniformity of the distribution of axial forces between the individual bolts of the clamping sleeve. Clamping sleeves are machine components connecting the shaft to the hub using contact force. For sleeve pretension, bolts are used and positioned symmetrically with respect to the axis of the clamping sleeve. Though the bolts are placed symmetrically around the axis, the bolt axial forces are not uniformly distributed when the bolts are tightened according to the manufacturer’s catalog. First, this article describes the procedure for tightening the sleeve bolts according to the manufacturer’s catalog. In the next part of the article, an FEA simulation of sleeve tightening is performed. The FEM simulation is then compared with the values found by measurement.

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“…According to VDI 2230, multiple bolted connections are also recommended to be solved using FEM. The FEM simulation verified by the experiment is included, for example, in [14][15][16].…”

Section: Bolted Connectionsmentioning

confidence: 99%

Unsymmetrically Distributed Bolt Axial Forces between Symmetrically Spaced Bolts of Clamping Sleeve

Hruzik,

Struz,

Trochta

et al. 2023

Symmetry

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“…This is evidenced by the substantial number of articles related to the analysis of the potential applications of AM in the production of machinery and equipment components [1][2][3][4][5][6][7][8]. Still, there are a lot of potential applications of AM technologies such as temporary fastening [9][10][11], but due to too little knowledge about the behavior of materials, only conventional materials are being used. Despite the parallel development and research into the use of metals, additive techniques predominantly rely on polymers [12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Bending Strength of Continuous Fiber-Reinforced (CFR) Polyamide-Based Composite Additively Manufactured through Material Extrusion

Łakomy,

Kluczyński,

Sarzyński

et al. 2024

Materials

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This paper shows the three-point bending strength analysis of a composite material consisting of polyamide doped with chopped carbon fiber and reinforced with continuous carbon fiber produced by means of the material extrusion (MEX) additive manufacturing technique. For a comparison, two types of specimens were produced: unreinforced and continuous fiber-reinforced (CFR) with the use of carbon fiber. The specimens were fabricated in two orientations that assure the highest strength properties. Strength analysis was supplemented by additional digital image correlation (DIC) analysis that allowed for the identification of regions with maximum strain within the specimens. The utilization of an optical microscope enabled a fractographic examination of the fracture surfaces of the specimens. The results of this study demonstrated a beneficial effect of continuous carbon fiber reinforcement on both the stiffness and strength of the material, with an increase in flexural strength from 77.34 MPa for the unreinforced composite to 147.03 MPa for the composite reinforced with continuous carbon fiber.

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“…The results show that the half-cone angle can be used to calculate the stiffness of the cover plate in the bolt connections. Grzejda 11 introduced a physical model of multi-bolted connections, including three subsystems (bolts, joined element, and the contact layer) and applied FEM to analyze the effect of non-linearity of the contact layer on the final values of the bolt forces in the case of sequential preloading of the multi-bolted connections. The results of the calculations were verified by the experimental results.…”

Section: Introductionmentioning

confidence: 99%

An experimental study on the relationship between torque and preload of threaded connections

Yang

Zhou

2018

Advances in Mechanical Engineering

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In order to investigate the relationship between torque and preload during the tightening process by using torque-only control method, a new measuring device was designed in this study. Nickel-based superalloy bolts and nuts of three specifications M8 3 1, M10 3 1.25, and M10 3 1.5 were used in threaded connections to implement the pre-tightening test at room temperature. Pre-tightening tests under four working conditions for every bolt were conducted. Torquepreload curves were drawn according to the test results, and nut factors were obtained by curve fitting method. The effect of surface lubrication and surface roughness on nut factor was analyzed. The results show that the nut factor under lubrication condition is smaller than that without lubrication when the surface roughness remains the same and that under the same lubrication condition, the larger the surface roughness, the greater the nut factor. The results show that the device proposed can be used to measure the preload accurately during the pre-tightening process of threaded connections. Finally, the influence of the screwing times on the nut self-locking torque was studied.

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Non-linearity of the contact layer between elements joined in a multi-bolted connection and the preload of the bolts

Cited by 5 publications

References 8 publications

Unsymmetrically Distributed Bolt Axial Forces between Symmetrically Spaced Bolts of Clamping Sleeve

Unsymmetrically Distributed Bolt Axial Forces between Symmetrically Spaced Bolts of Clamping Sleeve

Bending Strength of Continuous Fiber-Reinforced (CFR) Polyamide-Based Composite Additively Manufactured through Material Extrusion

An experimental study on the relationship between torque and preload of threaded connections

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