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- Title
ELECTRICAL CONTACT RESISTANCE MEASUREMENT IN ELASTOHYDRODYNAMIC CONTACTS.
- Authors
SACHANAS, C.; MOISIADIS, A.; MIHAILIDIS, A.
- Abstract
Heavily loaded rolling-sliding concentrated contacts operate often in the mixed lubrication regime. Only a part of the load is carried by the elastohydrodynamic lubricant film. The rest is carried by the contacting asperities. At these spots, temperature and pressure reach very high values and may cause extensive wear, smearing and even scuffing. The surfaces of machine elements made from steel are never 'clean' and 'bare'. Instead, they are covered at least to some extent by reaction layers. These layers play an important role in the load carrying capacity, since they prohibit bare steel to steel contact and in this way they may protect the rubbing surfaces. The need to study them is evident. One major difficulty is that they are built-up and worn-away during operation while the surfaces pass though the contact. Fortunately, their electrical resistance differs significantly from the resistance of steel, giving a possibility to study their behaviour. In the present work, a newly developed measurement equipment, which allows for precise ECR measurements under realistic operating conditions is presented. The concurrent and competitive process of removal and reformation of the reaction layers and the revelation of bare steel surfaces coming directly into contact is clearly demonstrated.
- Subjects
MEASUREMENT of contact resistance; ELECTRIC resistance measurement; ELECTRIC resistance; ELASTOHYDRODYNAMIC lubrication; ELECTRIC properties of steel
- Publication
Journal of the Balkan Tribological Association, 2016, Vol 22, Issue 1, p32
- ISSN
1310-4772
- Publication type
Article