Modeling of fatigue wear of a two-layered elastic half-space in contact with periodic system of indenters

Goryacheva, I. G.; Torskaya, E. V.

doi:10.1016/j.wear.2010.02.018

Cited by 28 publications

(21 citation statements)

References 8 publications

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“…can be used), and the modeling conditions (1) and (2) are also satisfied. An average distance between the asperities is 0.15 mm, a dispersion of calculated radiuses is large, which is probably caused by discrete measurements of the profiles.…”

Section: Resultsmentioning

confidence: 99%

“…The discrete contact of the coated elastic bodies was studied as an indentation or a sliding of asperities (periodic system 1,2 or a model based on the profilometry) 3–5 through the coatings with constant thickness. The same models of discrete contact were used to solve two-level contact problem, when the roughness of the counter body was taken into account in macrocontact problem solution.…”

Section: Introductionmentioning

confidence: 99%

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Study of roughness effect on elastic indentation of coated bodies

Torskaya

2015

Proceedings of the Institution of Mechanical Engineers, Part C:

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Two-level contact problem is proposed to study the effect of roughness of elastic coatings. The solution is based on using a function of additional displacements in a macrolevel contact problem formulation. The dependence of additional displacements on nominal pressure is obtained from consideration of a periodic model of roughness. Analytical–numerical method, which is based on Hankel integral transforms, boundary elements, and iteration procedure, is used to find macrocontact characteristics. The influence of the parameters of microgeometry on contact characteristics at macroscale is analyzed.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Study of roughness effect on elastic indentation of coated bodies

Torskaya

2015

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…The solutions of the dry contact problems for functionally graded materials for contacts with fixed and unknown boundaries will be obtained. There are many studies dedicated to finding the solution to these problems [5–27]. Specifically, plane and axisymmetric problems for a rigid punch indented in a half-plane/half-space with a coating made of functionally graded material have been considered in purely elastic formulation [5–10], in thermo-elastic formulation [11–15], in electro-elastic formulation [16, 17], in magneto-electro-elastic formulation [18, 19], in viscoelastic formulation [20], etc.…”

Section: Introductionmentioning

confidence: 99%

“…Most solutions of contact problems for solids with coatings are obtained under special assumptions concerning the variations of the coating elastic characteristics with depth. Specifically, for the cases of piece-wise constant elastic characteristics [12, 20, 22, 23], for elastic characteristic varying according to a power law [8, 10], and for the case of exponential variations of elastic characteristic [5, 9, 11, 16–19, 26, 27]. Only in a few studies [6, 7] was it assumed that the coating elastic characteristics vary continuously and arbitrarily with depth.…”

Section: Introductionmentioning

confidence: 99%

“…Specifically, plane and axisymmetric problems for a rigid punch indented in a half-plane/halfspace with a coating made of functionally graded material have been considered in purely elastic formulation [5][6][7][8][9][10], in thermo-elastic formulation [11][12][13][14][15], in electro-elastic formulation [16,17], in magneto-electro-elastic formulation [18,19], in viscoelastic formulation [20], etc. A frictional contact have been studied [12,17,19,21,22], where the case of thermo-frictional heat generation was considered [12,17,19], the case of wear was studied [23], etc. Plane contact of two elastic solids with functionally graded coatings has been investigated [25][26][27].…”

Section: Introductionmentioning

confidence: 99%

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Lubricated point heavily loaded contacts of functionally graded materials. Part 1. Dry contacts

Kudish

Volkov

Vasiliev

et al. 2017

Mathematics and Mechanics of Solids

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Over the last couple decades coatings attract more and more attention in practical applications. The present study addresses a question which is not well studied: how coated surfaces behave in lubricated contacts? In other words, this is a study of the effectiveness of functionally graded materials in heavily loaded point elastohydrodynamically lubricated contacts with straight lubricant entrainment. As a part of the study, some criteria of coating effectiveness are introduced and discussed. More specifically, the behavior of main parameters such as the lubrication film thickness and the frictional force in point heavily loaded lubricated contacts of functionally graded elastic materials are considered. The problem is studied based on the method of matched asymptotic expansions which allows us to split the problem into two separate problems: a dry contact problems for functionally graded elastic materials and an elastohydrodynamically lubricated problem for functionally graded materials. The elastohydrodynamically lubricated problem uses as input data not only the operational and physical parameters of the materials and lubricant but also the asymptotic behavior of the dry contact problem solution near the contact boundaries. Therefore, a sequence of two problems must be solved: the dry contact problems for functionally graded elastic materials and the elastohydrodynamically lubricated problem for functionally graded materials. Similar methods have been used for the analysis of an elastohydrodynamically lubricated problem for heavily loaded line contacts of functionally graded materials. The dry contact problem will be analyzed in Part 1 of the paper based on a semi-analytical bilateral method which produces correct asymptotic solutions for thin and thick coatings. The analytical expressions for contact pressure are obtained and analyzed for various combinations of coating thicknesses and elastic properties. The elastohydrodynamically lubricated problem will be considered in Part 2 of the paper based on the method of matched asymptotic expansions. In the analysis of the elastohydrodynamically lubricated problem, as in the case of homogeneous contact materials, it is shown that the whole contact region can be subdivided into three subregions: the central one which is adjacent to the other two regions occupied by the ends of the zones. The central region can be subdivided into the Hertzian region and then adjacent to it inlet and exit zones which, in turn, are adjacent to the inlet and exit boundaries of the contact, respectively. In the Hertzian region the elastohydrodynamically lubricated problem solution is very close to the solution of the corresponding dry (i.e. non-lubricated) contact problem for functionally graded elastic materials which have been analyzed. In the central region in the inlet and exit zones of a heavily loaded point elastohydrodynamically lubricated contact, the elastohydrodynamically lubricated problem for functionally graded elastic materials using certain scaling transforms can be reduced...

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Modeling of Fatigue Fracture of Coatings in Multi-cycle Friction Contact

Torskaya

2018

Proceedings of the 7th International Conference on Fracture Fatigue and Wear

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Modeling of fatigue wear of a two-layered elastic half-space in contact with periodic system of indenters

Cited by 28 publications

References 8 publications

Study of roughness effect on elastic indentation of coated bodies

Study of roughness effect on elastic indentation of coated bodies

Lubricated point heavily loaded contacts of functionally graded materials. Part 1. Dry contacts

Modeling of Fatigue Fracture of Coatings in Multi-cycle Friction Contact

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