An Incremental Equivalent Circular Contact Model for Rough Surfaces

Wang, Gangfeng; Liang, Xuanming; Yan, Dapeng

doi:10.1115/1.4050602

Cited by 26 publications

(18 citation statements)

References 16 publications

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“…At the initial stage of contact, one could observe the obvious linear relation between load and actual contact area for three surfaces. Such linear relation has been reported in the simulation of both elastic and elastoplastic rough surface contact [14][15][16]. Furthermore, the difference in contact response of the three surfaces has also been reflected significantly, especially in curves slopes.…”

Section: Resultssupporting

confidence: 65%

“…Recently, Wang et al [14][15][16]27] proposed a series of incremental contact models, which can deal with rough contact problems of different materials, including elastic, elastic-perfectly plastic, and strainhardening plastic solids, as well as solids with strain gradient plasticity. In this work, the model is extended to account for the contact of hyperelastic solids.…”

Section: The Incremental Equivalent Circular Contact Model Accounting...mentioning

confidence: 99%

“…Persson's contact theory is strict for complete contact, whereas recalibration is required for small area fractions. Recently, Wang et al [14] adopted a deterministic description of rough surfaces and put forward an incremental contact model for elastic and elastoplastic materials, which is validated by both the finite element method [14,15] (FEM) and optical experiments [16] with contact area fractions up to 15%. However, hyperelasticity is absent in the abovementioned models.…”

Section: Introductionmentioning

confidence: 99%

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An incremental contact model for hyperelastic solids with rough surfaces

Jiang

Liang

2023

Preprint

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Hyperelastic materials like gels and rubbers have numerous applications in daily life and industrial production. However, most traditional contact models for rough solids do not include the hyperelastic deformation mechanism. This paper extends the linear-elastic incremental equivalent contact model to study the contact processes of hyperelastic rough solids. For any specific surface separation, the contact stiffness is determined by the total area and number of the contact patches, as well as the instantaneous tangent modulus. Analogous to buckle theory, we introduce the hyperelasticity of materials through employing the tangent modulus. By integrating the stiffness of contact spots, the normal contact force is then obtained. The load-area relation predicted by the present model exhibits consistency with finite element results even up to a contact area fraction of 90%. For hyperelastic solids with self-affine fractal rough surfaces, we investigate the effect of surface morphologies on contact behaviors. This research will be helpful for further studies about the lubrication, leakage, and wear of contact interfaces.

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Section: Resultssupporting

confidence: 65%

Section: The Incremental Equivalent Circular Contact Model Accounting...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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An incremental contact model for hyperelastic solids with rough surfaces

Jiang

Liang

2023

Preprint

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“…Therefore, some methods for accurately calculating the real contact area by relatively sparse elements are proposed [19,64]. Based on the distribution law of discrete mesh calculation error, Yastrebov [65,66] proposes a correction formula for calculating the real contact area.…”

Section: Methodsmentioning

confidence: 99%

An equivalent calculation method for 3D contact area between two rough surfaces based on 2D profiles

Jing

Meng

Dai

et al. 2022

Preprint

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The calculation of the real contact area between rough surfaces is an important prerequisite for studying the contact characteristics of mechanical joints. However, it is challenging to accurately calculate the real contact area between rough surfaces by existing theoretical and experimental methods. Therefore, an efficient and practical equivalent calculation method for the real contact area between three-dimensional(3D) rough surfaces based on two-dimensional(2D) profiles is presented in this paper. The main advantage of the presented method as compared with those available in the literature is that the real contact area can be predicted only by the section of the 3D rough surfaces in contact, which greatly reduces the computational cost. The sampling strategy of sections is studied to improve the accuracy of the proposed method. The accuracy of the proposed equivalent calculation method is verified by numerical simulation. The results show that the proposed equivalent calculation method can efficiently predict the real contact area between rough surfaces within the scope of engineering application.

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“…However, since the interaction and coalescence between neighboring asperities were not considered in these multi-roughness models, they could only be valid for a small contact area and thus have significant disadvantages [14]. Recently, some studies have used profilometric theory to determine the real contact area [19][20][21]. However, this theory requires significant numerical analysis of the intersection geometry of a rough surface.…”

Section: Introductionmentioning

confidence: 99%

Effects of surface roughness and counter body variables on the dry sliding wear behavior of AISI 4140 steel based on the elastoplastic flattening model

Küçük

Erdoğan²,

Kurşuncu

et al. 2023

Surf. Topogr.: Metrol. Prop.

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This study aimed to determine the effect of surface roughness and counter body material on the wear behavior of AISI 4140 steel based on the elastoplastic flattening model. Most studies in tribology based on the elastoplastic regime focus on modeling the contact between a sphere and a flat surface. However, these models' main challenge is determining the real contact area. This study claims that the real contact area can be detected with high accuracy through interface software used in optical microscopy. The sample surfaces were roughened and then supposed to dry sliding wear tests using the AISI 52100 and Al2O3 abrasive counter bodies under varying loads and test durations. It was concluded from the calculations that the sample's surface roughness value significantly affects the contact pair's plasticity index and, thus, the sample's wear behavior against the counter body material. Higher plasticity index values indicating the abrasive effect were obtained with the Al2O3 ball, which has a higher hardness and elasticity modulus than the AISI 52100 steel ball. The surface damage of the sample with a high roughness value was less than the other samples. The COF values obtained with the steel ball were detected as lower than that of the alumina ball. Also, it was seen that the surface roughness parameter and plasticity index values calculated were compatible with the wear characteristics of the test samples. As a result, determining the real contact area between the contacting surfaces and its usability in calculating the elastoplastic flattening model parameters were experimentally tested and verified.

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An Incremental Equivalent Circular Contact Model for Rough Surfaces

Cited by 26 publications

References 16 publications

An incremental contact model for hyperelastic solids with rough surfaces

An incremental contact model for hyperelastic solids with rough surfaces

An equivalent calculation method for 3D contact area between two rough surfaces based on 2D profiles

Effects of surface roughness and counter body variables on the dry sliding wear behavior of AISI 4140 steel based on the elastoplastic flattening model

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