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Reliability optimisation for the multi-contact connector system under fretting conditions

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Abstract
The harsh operating environments of many electronic systems, such as in the automotive and aerospace applications, make the semi-permanent connector terminal susceptible to intermittent failure or high contact resistance. Fretting, small cyclic movements at the contact interface, is exacerbated by oxidation to cause fretting corrosion, resulting in these types of failures. However, due to the fretting
action, the contact does not remain in the failed state but often recovers to low contact resistance for a period before the next failure event. Improvements in reliability can be achieved by specific design considerations, either increasing the normal force of the contacts, or increasing the number of contacts per terminal or both. This paper shows the optimum design for the ratio of the total normal force (F) of
all contacts and the number of contacts (n) per terminal, for one of the most popular contact materials used in connector technology. A model is developed, the optimum F/n Model, incorporating failure and recovery rates based on a theoretical understanding of the contact interface and experimental investigations. This is used to select the appropriate ratio between normal force and number of contacts per terminal (force/multi-contact, F/n) ratio for optimised reliability. A minimum in the unreliability function is found for particular
values of force and contact number and recommended for optimum performance for the tin-plated system.

Keywords Optimisation · Connector · Reliability · Fretting · Contacts · Normal Force

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Ketersediaan

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Informasi Detail

Judul Seri

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No. Panggil

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Penerbit

: Springer-Verlag Berlin Heidelberg., 2017

Deskripsi Fisik

Electr Eng (2017) 99:1–8

Bahasa

English

ISBN/ISSN

1432-0487

Klasifikasi

NONE

Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

Electronical engineering ; Volume 99, Issue 1, Mar

Subjek

TEKNIK ELEKTRO

Info Detail Spesifik

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Pernyataan Tanggungjawab

ety

Versi lain/terkait

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