In-situ Observations of a Multi-Asperity Real Contact Area on a Submicron Scale

Zugelj, B. Brodnik; Kalin, Mitjan

doi:10.5545/sv-jme.2017.4366

Cited by 13 publications

(1 citation statement)

References 35 publications

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“…Wang and Keer [22] and Zhao et al [23] considered the hardening of materials during contact as one of the parameters that can be used for verifying the numerical models. Several methods have been proposed to measure this property [24][25][26][27][28][29][30][31][32][33][34][35][36][37]. These methods are based on thermal [27][28][29], electrical [30,31], and optical [32][33][34] principles.…”

Section: Introductionmentioning

confidence: 99%

Numerical and experimental study on the effect of considering plastic and elastoplastic deformation of each asperity in dry contact of rough surfaces

Esfahani¹,

Akbarzadeh²,

Kadkhodaei³

2019

Surf. Topogr.: Metrol. Prop.

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Contact is one of the main means to transmit force between bodies, and a detailed study of contact mechanics provides the required knowledge toward a realistic prediction of the behavior of contacting bodies. In this study, an approach based on the Greenwood-Williamson model is developed in which all of the contact points on the contacting surfaces are observed momentarily. The surface roughness is experimentally measured. The surface asperities are treated as spline functions, and their properties such as radius of curvature are obtained by differentiating these functions. The response of each individual contact point is evaluated by solving contact equations related to a specific asperity in elastic, elastoplastic, and plastic regimes. The method is therefore called spatially resolved Greenwood-Williamson (SRGW) model. To validate the model, a new technique is used which is based on indentation. A series of indentation experiments are conducted on two contacting surfaces, and the elastic and plastic deformations of the asperities under different loads are measured. The percentage error of the proposed approach is lower compared to other methods such as GW and ZMC, which shows the higher accuracy of this new method. The results show that the presented model can predict experimental results with reasonable accuracy under different contact conditions.

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Section: Introductionmentioning

confidence: 99%

Numerical and experimental study on the effect of considering plastic and elastoplastic deformation of each asperity in dry contact of rough surfaces

Esfahani¹,

Akbarzadeh²,

Kadkhodaei³

2019

Surf. Topogr.: Metrol. Prop.

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Evaluation of the Real Contact Area of Rough Surfaces by Using a Finite Element Model

Ruggiero

Stefano

2020

Mechanisms and Machine Science

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The purpose of this research was the analysis and the evaluation of the real contact area (RCA) of 15 rough samples with different mechanical properties. The investigation was carried out by the realization of a FEM model which simulates the contact between a rough deformable surface and rigid smooth sapphire plane. The roughness of the rough plane was modelled as a series of hemispheres of different radius which represent the asperities. Adhesion and asperities interaction were not considered and the peaks were distributed according to a Gaussian function. All the results, in terms of total area, load, pressure, deformation, were compared with the values calculated by two classical contact statistical models.

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Three-dimensional asperity model of rough surfaces based on valley–peak ratio of the maximum peak

Zhou

Wang

et al. 2021

Meccanica

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In-situ Observations of a Multi-Asperity Real Contact Area on a Submicron Scale

Abstract: We present apparatus that allows in-situ optical measurements of the evolving real contact area between a rigid glass and a deformable Al6026 surface with 700 nm of lateral and 20 nm of vertical resolution. In previous experimental studies of multi-asperity real

Cited by 13 publications

References 35 publications

Numerical and experimental study on the effect of considering plastic and elastoplastic deformation of each asperity in dry contact of rough surfaces

Numerical and experimental study on the effect of considering plastic and elastoplastic deformation of each asperity in dry contact of rough surfaces

Evaluation of the Real Contact Area of Rough Surfaces by Using a Finite Element Model

Three-dimensional asperity model of rough surfaces based on valley–peak ratio of the maximum peak

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