Journal of Theoretical
and Applied Mechanics

57, 1, pp. 73-84, Warsaw 2019
DOI: 10.15632/jtam-pl.57.1.73

### Numerical analysis of contact plastic bodies made by aluminium alloy with taking account of micro-roughness surfaces

Paweł Sidun, Jan Piwnik
The following article describes selected aspects of numerical modeling of the process of
bonding metal alloys with consideration for micro-roughness. Plastic contact between two
deformable bodies is studied within a DEFROM FEM environment. The paper presents
selected numerical analysis results for an aluminum alloy. The mathematical model of surface
roughness has been created on the basis of the surface real profile. The dependence between
the tool lathe angle and the feed has been used to build a numerical model of roughness after
completion of the turning process. The article investigates the impact of wave roughness in
respect to the size effect and the possibility of cold welding as well as the simplification
process of real surface roughness.
Keywords: bonding process, FEM analysis, cold welding, wave roughness

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