Double Rough Surface Contact Model and Finite Element Simulation based on Fractal Theory

Song, Jianfeng; Wang, Wenwu; Lang, Yuedong; Dong, Yongxiang; Luo, Guo-Ling

doi:10.1088/1742-6596/1877/1/012016

Cited by 2 publications

(2 citation statements)

References 4 publications

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“…In addition, these models borrow the solution of spherical or paraboloidal contact to represent a single unevenness. Song et al 6 analyzed the contact area and contact load based on the test results of machined surface morphology with different surface roughness. The authors used the two-rough surface two-dimensional finite element contact model established in the Abaqus software.…”

Section: Introductionmentioning

confidence: 99%

Analysis of tangential characteristics of the paraboloidal contact model

Guo

Peng

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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A paraboloidal contact model with different axial crossing angles is established. The contact model is subjected to a combined action of normal and tangential loads. Based on the Hertzian theory, the contact states of the model under the action of the normal load are obtained by deriving the equations. The contact states include critical interference values of the elastic phase, elastoplastic phase, and plastic phase. Under the action of the normal preload, the tangential stiffness of the contact model is obtained and verified by finite element simulation. Simulation results indicate that tangential displacements of the contact model in the deformation phase correspond well with analytical solution equations. Stresses and strains on the contact surface are also investigated. By employing the proposed contact model, the effects of axial crossing angle, friction factor, focal length, and normal load on mechanical properties are investigated. The paraboloidal contact model is advantageous to contact analysis for paraboloidal gears and cams.

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Section: Introductionmentioning

confidence: 99%

Analysis of tangential characteristics of the paraboloidal contact model

Guo

Peng

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…Engineering surfaces are found to have fractal characteristics [29,30]. When fractal parameters instead of statistic parameters are adopted to characterize rough surfaces, there is no need to make too many assumptions about the surface topography, and the fractal characteristics of rough surfaces can be preserved [31][32][33][34][35]. As a result, although there are some skeptical opinions on the fractal approaches [36], contact models based on fractal theory have received more and more attention from researchers.…”

Section: Introductionmentioning

confidence: 99%

A Fractal Contact Model for Rough Surfaces considering the Variation of Critical Asperity Levels

Liu

Guo

Chen

et al. 2022

Advances in Materials Science and Engineering

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A contact model for rough surfaces based on the fractal theory is proposed in the present work. Firstly, the deformation of the material is divided into four stages: elastic deformation, the first elastoplastic deformation, the second elastoplastic deformation, and full plastic deformation. And the variation of material hardness is considered when analyzing the contact characteristics of a single asperity within the first and second elastoplastic deformation stages. Secondly, the size distribution function of contact spots at different frequency levels is derived. And the expressions of asperity critical frequency levels are rederived. Lastly, the feasibility and credibility of the proposed model are verified by comparison with other contact models and experimental data. The results show that when the variation of the material hardness is considered, the contact area of a single asperity in the first elastoplastic deformation stage becomes larger, while the contact area of a single asperity in the second elastoplastic deformation stage becomes smaller. Moreover, the critical asperity frequency levels of the rough surface are not constant, but the variables are related to the total real contact area of the rough surface and decrease as the real contact area increases. The proposed model is a modification and improvement of the existing fractal contact models, which can lead to a more accurate relationship between the contact load and the total real contact area of the rough surface.

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Double Rough Surface Contact Model and Finite Element Simulation based on Fractal Theory

Cited by 2 publications

References 4 publications

Analysis of tangential characteristics of the paraboloidal contact model

Analysis of tangential characteristics of the paraboloidal contact model

A Fractal Contact Model for Rough Surfaces considering the Variation of Critical Asperity Levels

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