Deterministic elastic-plastic modelling of rough surface contact including spectral interpolation and comparison to theoretical models

An, Bowen; Wang, Xianzhang; Xu, Yang; Jackson, Robert L.

doi:10.1016/j.triboint.2019.02.039

Cited by 39 publications

(14 citation statements)

References 35 publications

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“…In addition, it has been shown to be extremely problematic to obtain an adequately refined mesh for deterministic elastic-plastic rough surface contact. 37 Therefore, deterministic methods are not employed in the current work. In this work elastic-plastic versions of the Archard-based multiscale model, 38,39 the Greenwood and Williamson statistical model 40,41 and the simple hardness model 42 are considered and compared to the measurements.…”

Section: Modeling Methodologymentioning

confidence: 99%

A comparison of nanoscale measurements with the theoretical models of real and nominal contact areas

Jackson

Chen

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part J:

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In this study, an experimental method is proposed to measure the real area of contact between an alumina sphere and an Al surface based on the adhesive transfer of the Au film and the scanning electron microscope in the back-scattered mode. A thin film of Au is sputtered on the alumina sphere before the indentation with the Al surface. After indentation, the interfaces of the alumina sphere and Al surface are observed by the scanning electron microscope. The contact area can be identified based on both the distributions of the alumina and Au on the alumina sphere and Al surface, respectively. The measured contact area at different nominal pressures are compared to predictions made by several popular theoretical elastic-plastic rough surface contact models.

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Section: Modeling Methodologymentioning

confidence: 99%

A comparison of nanoscale measurements with the theoretical models of real and nominal contact areas

Jackson

Chen

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part J:

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“…Notably, although the model in this study adopts the setting that hardness is 2.8 times the yield strength, the real situation is much more complicated than the setting. The "hardness" is not only related to material properties or geometry but also to the 6 Friction | https://mc03.manuscriptcentral.com/friction contact scale [35][36][37]. To reduce the influence of related variables, we adopt the simplest and unified setting in this study.…”

Section: Elastoplastic Contact Model Of a Single Asperitymentioning

confidence: 99%

New analytical model of elastic-plastic contact for three-dimensional rough surfaces considering interaction of asperities

et al. 2021

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The contact calculation of three-dimensional real rough surfaces is the frontier field of tribology and surface science. In this study, we consider the interaction and elastic-plastic deformation characteristics of asperities and further, propose an analytical contact calculation method for rough surfaces considering the interaction of asperities. Based on the watershed algorithm, the rough surface is segmented and the asperities are reconstructed into ellipsoids. According to the height relationship between the asperities, the definition of the deformation reference height of the matrix between each couple of asperities is provided. Subsequently, the calculation formula of the substrate deformation is provided according to the local contact pressure considering the elastic-plastic deformation of the asperity, and the contact state under a specific load is determined using the iterative correction method. The results correspond with those of finite element numerical calculation and the study reveals the following: (1) compared with the results obtained without considering the asperity interaction, contact area, distance, and stiffness will be reduced by 6.6%, 19.6%, and 49.5%, respectively, when the influence of asperity interaction is considered; (2) the interaction of the asperities has the greatest influence on the surface contact distance and stiffness. Under the same load, the existence of asperity interaction will reduce the contact distance, area, and stiffness; (3) considering the interaction of the asperities, the higher asperity will bear more load, but it will simultaneously reduce the contact of the surrounding area and increase that of the distant area. The calculation method proposed in this study has the advantages of high calculation efficiency and accuracy, thus, providing the calculation basis and method for subsequent studies on service performance of rough surfaces, such as the calculation of contact stiffness and fatigue performance analysis of rough surfaces.

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“…In the past few decades, many scholars have studied the modeling of rough surface contact. 1–8 Greenwood and Williamson 6 proposed a classic statistical contact model (the G-W model). The model assumes that the rough surface is composed of hemispherical asperities with the same curvature radius, whose height obeys the Gaussian distribution, and the deformations of asperities are independent of each other.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation experiments and regression modeling for asperity contact of ceramic surfaces

Tan

2021

SIMULATION

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Ceramic materials, with their excellent properties, have been widely used in the engineering field. With the ceramic surface as the research object, the properties of elastic contact of ceramic surfaces are studied using the numerical simulation calculation method. In this paper, uniform experimental design is carried out with topography parameters, external load, and material property parameters, which have a direct impact on the surface contact; a numerical calculation model is established and a series of simulation experiments is carried out on the contact of asperities on the ceramic surface, which not only intuitively shows the contact behavior of asperities on the ceramic surface, but also obtains the contact parameters of the surface. Then, the numerical simulation results are compared with those of G-W model, which proves the feasibility of the numerical simulation calculation and shows that the numerical simulation model established in this paper is more in line with the engineering practice than the G-W model. Through the regression analysis of the simulation results, the analytical calculation model between the surface contact parameters and the influencing factors is established, which provides references for quantitative analysis and characterization of contact properties related to the material surface.

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Deterministic elastic-plastic modelling of rough surface contact including spectral interpolation and comparison to theoretical models

Cited by 39 publications

References 35 publications

A comparison of nanoscale measurements with the theoretical models of real and nominal contact areas

A comparison of nanoscale measurements with the theoretical models of real and nominal contact areas

New analytical model of elastic-plastic contact for three-dimensional rough surfaces considering interaction of asperities

Numerical simulation experiments and regression modeling for asperity contact of ceramic surfaces

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