Analysis of phenomena in real contact spots due to dynamic forcing under tangential micromotion
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Файли
Дата
2012
Автори
Shalapko, Yuriy
Radek, Norbert
Назва журналу
Номер ISSN
Назва тому
Видавець
Анотація
Currently, there are two basic concepts concerning surface damage processes:
one connected with surface activation, which involves an increase in free
energy in a tribological system, and the other connected with surface passivation,
when free energy decreases. In oscillating tribocontacts, we observe intensive
formation of secondary structures of type I (Fe2O3, Fe3O4) and type II (FeO).
Experimental and theoretical studies were conducted to determine the contact
between a sphere and a plane, which is the most suitable system for simulating
small-amplitude fretting (~ 0–3 microns). In a single point contact, we can
observe all types of local surface damage in the radial direction depending on
the relative slip amplitude (practically, from ~ 0), from absolutely elastic
interaction in the central contact zone to the slip amplitude at the margin of the
contact area in micrometers. It is very important to implement numerical and
continuous integration of the stick-slip zones and calculate the contact stress
and strain of the surface layer. Analyzing the influence of thermal fluctuation
on the strength of materials, we can determine the parameters of activation of
the surface damage at small-amplitude fretting.
Опис
Ключові слова
fretting-process, contact damage, partial slip, stick-slip, Hertzian contact, fretting-proces, uszkodzenie kontaktu, poślizg częściowy, stick-slip, kontakt Hertza
Бібліографічний опис
Shalapko Yu. Analysis of phenomena in real contact spots due to dynamic forcing under tangential micromotion / Yu. Shalapko, N. Radek // Tribologia. Teoria i praktyka. – 2012. – № 1. – P. 133–146.