On the dry elasto-plastic contact of nominally flat surfaces

Sahlin, Fredrik (author)

Larsson, Roland (author)

Glavatskikh, Sergei (author): Luleå University of Technology, Division of Machine Elements

(creator_code:org_t)

Elsevier BV, 2007
2007
English.
In: Tribology International. - : Elsevier BV. - 0301-679X .- 1879-2464. ; 40:4, s. 574-579

Related links:: http://pure.ltu.se/p...; show more...; https://urn.kb.se/re...; https://doi.org/10.1...; https://urn.kb.se/re...; show less...

Abstract Subject headings

A model to be used for numerical simulation of the contact of linear elastic perfectly plastic rough surfaces was developed. Energy dissipation due to plastic deformation is taken into account. Spectral theory and an FFT-techique are used to facilitate the numerical solution process. Results of simulations using four two-dimensional profiles with different topographies in contact with a rigid plane for a number loads are reported. From the results it is clear that the real area of contact (Ar) changes almost linearly with load and is only slightly affected by the difference in topography. A plasticity index is defined as the ratio of plastically deformed areaÂ (Ap) and Ar. Plastic deformation occurs even at low loads and there is a significant difference in plasticity index between the surface profiles considered. An investigation on how the spectral content of the surface profile influences the results presented is also performed. This is to ensure that the metrological limitations of the optical profilerused to measure the surfaces do not have a significant influence. It is concluded that the highest frequencies of the measured profile have a negligible influence on the real area of contact.

By the author/editor: Almqvist, Andrea ...; Sahlin, Fredrik; Larsson, Roland; Glavatskikh, Ser ...

About the subject

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Mechanical Engin ...; and Tribology

By the university: Royal Institute of Technology; Luleå University of Technology

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