Influence of roughness on characteristics of tight interference fit of a shaft and a hub

Yang, Gong-Ming; Coquille, Jean Claude; Fontaine, Jean François; Lambertin, M.

doi:10.1016/s0020-7683(01)00035-x

Cited by 53 publications

(17 citation statements)

References 8 publications

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“…Figure 19 shows the scattering of the pull-out force versus the surface roughness. where roughness was found to correlate with bond strength (Yang et al, 2001). Yang et al examined this effect in more detail in a subsequent work, showing that while the roughness can lead to a loss in interference due to the valleys of the rough texture, the plastic deformation of the asperities in the texture can lead to increased contact pressure, and thus an increased bond strength (Yang et al, 2002).…”

Section: Pull-out Force Resultsmentioning

confidence: 99%

Laser surface texturing of stainless steel 316L cylindrical pins for interference fit applications

Obeidi

McCarthy

Kailas

et al. 2018

Journal of Materials Processing Technology

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This study is focused on the development of a novel method for designing high-end interference fit fasteners. In this work, a new surface laser treatment process was utilized to enable enhanced usability and bond strength control of press-fit connections. Cylindrical 10 mm diameter pins of 316L were textured over a 10 mm length using a pulsed CO2 laser beam focused one millimeter below the surface, with the thermal energy adjusted to bring the surface to just above the melting point of the metal. The pin surface morphology and dimensions were precisely controlled by controlling the laser processing parameters specifically the laser beam power, the pulse repetition frequency, and the overlap between scan tracks. The pin was inserted into a hub hole diameter of 10.05±0.003 mm and pull out joint bond strengths were examined. The results of this study showed that surface thus altered provided improved control of the bond strength which is a particular novelty of this new interference fit joining method. Surface roughness, Ra, from 40 to 160 µm, melt pool depths from 0.4 to 1.7 mm, increases in the pin outer diameter from 0.5 to 1.1 mm, and pull out forces of up to 7.51 kN were achieved. The bond joint was found to re-grip before final failure providing a more secure joint and increased safety. This joining method allows for the possibility of joining different materials. The pulse repetition frequency was measured to be the most significant processing parameter for control of the resulting mechanical properties and the bond strength with a clear inverse relationship.

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Section: Pull-out Force Resultsmentioning

confidence: 99%

Laser surface texturing of stainless steel 316L cylindrical pins for interference fit applications

Obeidi

McCarthy

Kailas

et al. 2018

Journal of Materials Processing Technology

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show abstract

“…The approach will not predict the stress concentrations at the ends of the joint and nor is it suitable for a bush of changing section (a railway wheel for example). Generally numerical methods, principally finite or boundary element analysis, are used to determine contact stress distribution [3,4,5,6,7]. These methods can be used to predict non-uniform contact pressures at the interface caused by geometry changes and edge stress discontinuities.…”

Section: Interface Pressure Calculationmentioning

confidence: 99%

Measurement of interface pressure in interference fits

Lewis

Marshall

Dwyer-Joyce

2005

Proceedings of the Institution of Mechanical Engineers, Part C:

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When components such as bearings or gears are pressed onto a shaft the resulting interference induces a pressure at the interface. The size of this pressure is important as many components fail because fatigue initiates from press-fit stress concentrations. This aim of this work was to develop ultrasound as a tool to non-destructively determine press-fit contact pressures.An interference fit interface behaves like a spring. If the pressure is high there are few air gaps; so it is very stiff and allows transmission of an ultrasonic wave. If the pressure is low then interface stiffness is lower and most ultrasound is reflected. A spring model was used to determine maps of contact stiffness from interference fit ultrasonic reflection data. A calibration procedure was then used to determine the pressure.The interface contact pressure has been determined for a number of different press and shrink fit cases. The results show a central region of approximately uniform pressure with edge stress at the contact sides. The magnitude of the pressure in the central region agrees well with the elastic Lamé analysis. In the more severe press fit cases, the surfaces scuffed which lead to anomalies in the reflected ultrasound. These anomalies were associated with regions of surface damage at the interface.The average contact pressure in a shrink fit and press fit joint were similar. However in the shrink fit joint more uneven contact pressure was observed with regions of poor conformity. This could be because the action of pressing on a sleeve plastically smoothes out long wavelength roughness leading to a more conforming surface.

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“…From the ANOVA (Table 4) it is clear that only the linear effects of interference and average undulation number are significant and the higher-order effects and interaction effects are negligible. Earlier investigations [15][16][17][18] observed the influence of the surface roughness of mating surfaces on the load bearing ability of interference-fitted assemblies. However, these investigations did not touch upon the roundness profile in general and the average undulation number in particular.…”

Section: Discussionmentioning

confidence: 99%

“…the pressure is maximum and the orthoradial stress is minimum on the peaks and vice versa on the valleys. Yang et al [18] worked on asperities behaviour at a mating surface; they confirmed that surface roughness has a noticeable influence on joint strength and proposed a new peak-to-peak tightening definition to compute the pressure.…”

Section: Introductionmentioning

confidence: 98%

Load bearing ability of interference-fitted assemblies: A roundness profile analysis

Sogalad

Udupa

2009

Proceedings of the Institution of Mechanical Engineers, Part C:

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This article makes a detailed study of the influence of harmonics and the average undulation number of roundness profiles on the load bearing ability of interference-fitted assemblies. For this purpose, a plan of experiments was prepared by taking 3 2 factorial design with interference and the average undulation number as parameters. The analysis reveals that both the parameters influence the load bearing ability of interference-fitted assemblies. Further, it is found that harmonics influence the load bearing ability of interference-fitted assemblies.

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Influence of roughness on characteristics of tight interference fit of a shaft and a hub

Cited by 53 publications

References 8 publications

Laser surface texturing of stainless steel 316L cylindrical pins for interference fit applications

Laser surface texturing of stainless steel 316L cylindrical pins for interference fit applications

Measurement of interface pressure in interference fits

Load bearing ability of interference-fitted assemblies: A roundness profile analysis

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