Modelling of interference fits with taking into account surfaces roughness with homogenization technique

Boutoutaou, Hamid; Bouaziz, Mohamed; Fontaine, Jean François

doi:10.1016/j.ijmecsci.2013.01.012

Cited by 23 publications

(8 citation statements)

References 25 publications

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“…However, they determined cylindricity using a non-standard method based on an analysis of roundness profiles at three different sections. Boutoutaou et al 19 modelled interference fits in FEM taking into account surface roughness using a homogenization technique and results showed good agreement with experimental results. Boutoutaou and Fontaine 20 proposed an FEM incorporating form defects and roughness defects in the design of interference (shrink fitted) assemblies, which is used to determine the specifications that consider the manufacturing process.…”

Section: Introductionmentioning

confidence: 76%

Combined effect of cylindricity, roundness and roughness on axial load-carrying ability of interference fits

Raj

Bhatti

Dhanish

2020

Proceedings of the Institution of Mechanical Engineers, Part J:

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Interference fits are commonly used in engineering for various applications. While the effect of many factors on the load-carrying ability of interference fits has been studied extensively, the combined effect of cylindricity, roundness and roughness does not appear to have been considered to that extent, and this paper is an attempt to remedy the situation. As a first step, finite element method was used to verify that there will be a reduction in the load-carrying ability due to the introduction of perfect geometrical deviations on the shaft. Thereafter, a detailed experimental investigation was carried out to study the effect of cylindricity and their joint effect with various other factors on the axial load-carrying ability of shaft–bearing interference fitted assemblies. A number of shafts of C40 steel of nominal diameter 20 mm were manufactured with varying cylindricity values and selectively assembled with standard deep grove ball bearings, thereby achieving interference fits with a grade of H7/u6 between them. The assembled specimens were tested on a Universal Testing Machine with a specially made fixture and the maximum extraction load determined. The effect of the various factors on the extraction load was examined using statistical methods. It was found that shaft cylindricity error did reduce the load-carrying ability of interference fits. The combination of interference, cylindricity and surface roughness was found to give the best prediction for extraction load. Certain other parameters were also examined, but they were not found significant.

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Section: Introductionmentioning

confidence: 76%

Combined effect of cylindricity, roundness and roughness on axial load-carrying ability of interference fits

Raj

Bhatti

Dhanish

2020

Proceedings of the Institution of Mechanical Engineers, Part J:

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“…During the actual assembly process, due to the surface roughness of parts, 7,8 the indentation method is used to assemble the minimum magnitude of interference, and min can be calculated.…”

Section: Calculate the Minimum Magnitude Of Interferencementioning

confidence: 99%

Theoretical and experimental studies for wind turbine’s shrink disk

Wang

Kang

Tang

2014

Proceedings of the Institution of Mechanical Engineers, Part C:

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With the wide application of multi-layer interference fit in many engineering fields, as for key component in the wind turbine generator, wind turbine’s shrink disk uses interference fit to transmit rated torque and axial force. In order to ensure the work reliability of shrink disk during the actual operation, the paper presents a more precise method on the design calculation of contact pressure on the mating surfaces with interference fit. In accordance with the order from the inside to the outside, the contact pressure of spindle-to-sleeve surface can be calculated based on the rated load required to transmit. Combining with Thick-wall Cylinder Theory and Lame Equation, taking into account the impact of fit clearance, the checking method of the bushing was used to calculate the contact pressure on mating surface of bushing-to-inner ring; and the stress analysis of the inner ring was used to calculate the contact pressure on mating surface of inner ring-to-outer ring. At the same time, the effects of frictional coefficient, fit clearance, and other design parameters on theoretical results were also analyzed. The pressure distribution of each mating surface was obtained by Abaqus software simulation, which showed that the results from improved method was closer to simulation results and had higher accuracy than traditional method by comparing the results with three different methods. Finally, the test was designed to verify whether the shrink disk could bear the load or not on the test platform of shrink disk, and the results indicated that it could meet the requirements of given loadcase.

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“…They concluded that the extraction force increases as the number of lobes increases. Boutoutaou et al (2013) they presented a technique of numerical homogenization in the behavior of a temperature interference adjustment. This approach allows considering the influence of roughness in the modeling of industrial parts that usually have a complex geometry.…”

Section: Introductionmentioning

confidence: 99%

Strength of the shaft/hub joint using a finite element model

Salgado-Cruz

Cortés-García

Szwedowicz-Wasik

et al. 2019

JSTA

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This article describes the effect of the roughness size on the axial slip strength between the parts of shaft/hub joints with interference fit. The surface roughness was obtained from a turning process with different finishes (fine, medium and rough). A finite element modeling was developed, which uses a normal contact stiffness equivalent to the size of the surface roughness between the joint pieces to represent the real contact. In order to validate the numerical model, theoretical results of contactpressure and extraction force of the shaft/hub joint with smooth elements were compared with the corresponding numerical results obtained. The numerical results from studies that considered the size of the surface roughness showed that the axial load capacity of the joint decreased with larger roughness.

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Modelling of interference fits with taking into account surfaces roughness with homogenization technique

Cited by 23 publications

References 25 publications

Combined effect of cylindricity, roundness and roughness on axial load-carrying ability of interference fits

Combined effect of cylindricity, roundness and roughness on axial load-carrying ability of interference fits

Theoretical and experimental studies for wind turbine’s shrink disk

Strength of the shaft/hub joint using a finite element model

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