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Development of a novel method to detect fretting motion in electrical connectors
RISE, Swerea, KIMAB.
Scania CV AB, Sweden.
Scania CV AB, Sweden.
2016 (English)In: ICEC 2016 - 28th International Conference on Electric Contacts, Heriot-Watt University , 2016, p. 87-92Conference paper, Published paper (Refereed)
Abstract [en]

Fretting tests of tin-coated connectors are often performed at exaggerated vibration levels, followed by measurement of the contact resistance. However, the strong vibration might cause stochastic penetration of the vibration induced oxide layer, and the connector might pass the test despite almost the entire contact area being covered by an insulating oxide layer. Therefore, in-situ detection of micro-slip at the contact interface during vibration would be desirable, since micro-motion is a prerequisite for fretting. In a previous study using model contacts, it has been demonstrated that oscillating slip will result in a detectable noise of the contact voltage drop. The electrical noise is probably caused by changes in the pattern of a-spots during the oscillating micro-slip. In this study, it is demonstrated that it is possible to measure the micro-slip induced electrical noise in real connectors. Thus, the vibration threshold level when the micro-slip starts can be determined in situ. Furthermore, this can be performed without influencing the dynamic behavior of the connector or changing the contact interface.

Place, publisher, year, edition, pages
Heriot-Watt University , 2016. p. 87-92
Keywords [en]
Fretting, In-situ, Threshold, Tin-coated, Vibration, Electric connectors, Electric contacts, Stochastic systems, Tin, Contact voltage drops, Dynamic behaviors, Electrical connectors, In-situ detections, Vibration thresholds, Motion analysis
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-42160Scopus ID: 2-s2.0-85018369946ISBN: 9780995465909 (print)OAI: oai:DiVA.org:ri-42160DiVA, id: diva2:1384363
Conference
28th International Conference on Electric Contacts, ICEC 2016, 6 June 2016 through 9 June 2016
Available from: 2020-01-09 Created: 2020-01-09 Last updated: 2020-01-09Bibliographically approved

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