Study of elastoplastic contact of a spherical indenter with metals and solid lubricating coatings: Part 1. Critical loads

Болотов, А. Н.; Meshkov, V. V.; Sutyagin, O. V.; Vasiliev, M. V.

doi:10.3103/s1068366613010029

Cited by 6 publications

(4 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…A number of works [15][16][17] used the empirical Mayer law to account for material hardening during elastoplastic contact, which establishes the relationship between the force when the sphere is pressed in and the diameter of the print. In [16,17], the influence of the single physico-mechanical properties of real materials on the features of the formation of contact elastoplastic deformations is emphasized. However, it explicitly features of the elastoplastic hardening body are not taken into account, which is a disadvantage of this approach.…”

Section: Contacting the Single Spherical Asperitymentioning

confidence: 99%

Indentation and flattening of rough surfaces spherical asperities

Ogar¹,

Gorokhov²,

Ugryumova³

2018

IJET

View full text Add to dashboard Cite

The paper indicates that the application of roughness models and the theories of contacting rough surfaces developed by Greenwood-Williamson and N.B. Demkin for solving the problems of hermetology leads to significant errors. This is explained by much greater contact pressures than for the tribology problems, by describing only the initial part of the reference surface curve, the lack of allowance for the plastic extrusion of the material. A brief review of methods for describing the introduction of a sphere into an elastoplastic reinforced half-space is given. The properties of the elastoplastic reinforced material are described by the power law of Hollomon. To describe the indentation and flattening of single spherical asperity, the results of finite element modeling are used. The cases of contacting a rigid rough surface with an elastoplastic half-space and a rigid smooth surface with a rough surface are considered. To determine the relative contact area, the discrete roughness model is used in the form of a set of spherical segments distributed along the height in accordance with the curve of the reference surface.

show abstract

Section: Contacting the Single Spherical Asperitymentioning

confidence: 99%

Indentation and flattening of rough surfaces spherical asperities

Ogar¹,

Gorokhov²,

Ugryumova³

2018

IJET

View full text Add to dashboard Cite

show abstract

“…Использование при расчетах числовых моделей [14][15][16] позволяет учитывать многочисленные факторы и точно описывать характер контактного взаимодействия. При определении деформации шероховатых поверхностей часто используется метод конечных элементов [17,18].…”

Section: влияние шероховатости на фактическую площадь контакта декеляunclassified

Determination of the actual deckle contact area and the actual pressure in the printed area

Aliyev,

Khalilov,

Ismailova

2023

MEI

View full text Add to dashboard Cite

The article determines the effect of micro-roughening of the surface roughness of the printing plate on the deformation of the deck. To study the effect of printing plate surface roughness on the actual contact area of the deck in the printing area, the interaction of the roughness microroughness with the surface of the softer material of the deck was considered. A review and discussion of the results of studies on contact problems was made. To determine the actual contact area from the applied load, the distribution of micro protrusions of the surface roughness of the printing plate is taken into account. A method has been developed for calculating the actual deckle contact area and the actual pressure in the printing area, taking into account the surface roughness of the printing plate. According to the proposed method, the values of the actual deckle contact area and the actual pressure in the printing zone were calculated. It has been established that with an increase in the normal load, the actual deckle contact area increases. Also, an increase in the normal load leads to an increase in the actual pressure. The set values of the actual contact area and the actual pressure contribute to the formation of an elastic saturated contact of the deckle, which ensures high quality prints. The results obtained by the developed method are compared with calculations based on known dependencies. In calculations, the number of protrusions crossed by the average level and the number of protrusion tops located above the midline in the area corresponding to the base length are determined, respectively, by the average roughness step and by the average step between adjacent roughness protrusions. The research results make it possible to make the right choice of printing plates and decals when adjusting and operating a printing machine, as well as to set the actual pressure value, which ensures high quality prints.

show abstract

“…A number of works [15][16][17] used the empirical Mayer law to account for material hardening during elastoplastic contact, which establishes the relationship between the force when the sphere is pressed in and the diameter of the print. In [16,17], the influence of the single physico-mechanical properties of real materials on the features of the formation of contact elastoplastic deformations is emphasized. However, its explicitly features of the elastoplastic hardening body are not taken into account, which is a disadvantage of this approach.…”

Section: Contacting the Single Spherical Asperitymentioning

confidence: 99%

Relative Contact Area by Indentation and Flattening of Rough Surfaces Spherical Asperities

Ogar

Gorokhov

Ugryumova

2018

Proceedings of the 4th International Conference on Industrial Engineering

View full text Add to dashboard Cite

The paper indicates that the application of roughness models and the theories of contacting rough surfaces developed by Greenwood-Williamson and N. B. Demkin for solving the problems of hermetology leads to significant errors. This is explained by much greater contact pressures than assumed for the tribology problems, describing only the initial part of the reference surface curve and the lack of allowance for the plastic extrusion of the material. A brief review of methods for describing the introduction of a sphere into an elastoplastic reinforced half-space is given. The properties of the elastoplastic reinforced material are described by the power law of Hollomon. To describe the indentation and flattening of single spherical asperity, the results of finite element modeling are used. The cases of contacting a rigid rough surface with an elastoplastic half-space and a rigid smooth surface with a rough surface are considered. To determine the relative contact area, the discrete roughness model is used in the form of a set of spherical segments distributed along the height in accordance with the curve of the reference surface.

show abstract

Study of elastoplastic contact of a spherical indenter with metals and solid lubricating coatings: Part 1. Critical loads

Cited by 6 publications

References 2 publications

Indentation and flattening of rough surfaces spherical asperities

Indentation and flattening of rough surfaces spherical asperities

Determination of the actual deckle contact area and the actual pressure in the printed area

Relative Contact Area by Indentation and Flattening of Rough Surfaces Spherical Asperities

Contact Info

Product

Resources

About