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In many industrial applications like automotive, aeronautics, train but also nuclear energy connectors need to maintain low stable electrical contact resistance. However, they are subject to vibrations that cause severe fretting wear damage which increases the electrical contact resistance and degrades information transmission. Fretting wear damages can induce dramatic increase of the direct current...
High technology domains such as aerospace, aviation and defense require a reliable transmission of RF signals. In these applications, RF connectors are exposed to severe environmental vibrations and are subjected to fretting wear damages. Former investigations on real connectors have shown that fretting wear leads to a dramatic increase of the DC electrical contact resistance (ECR), degrades RF microwave...
In many applications, RF connectors are subjected to severe environmental vibration. Vibration induces micro-displacements, leading to fretting wear damage in the contact. The purpose of this study is to investigate the effect of fretting wear on the microwave signal and more precisely on the additive phase noise [1, 2]. A dedicated vibration test was developed, combining DC and microwave measurement...
In transport applications (automotive, aviation), the increase of electronic devices promotes an extensive use of electrical connectors which need to maintain a low and stable electrical contact resistance. However, they are subject to vibration, which can cause severe fretting wear damage in the contact, leading to increased electrical contact resistance and decay of information transmission. Presently,...
Electrical contacts such as those involved in connectors are subject to critical fretting wear damage due to vibration. To increase electrical contact resistance (ECR) endurance, noble layer such gold or silver can be applied. However, when these top layers are worn through the introduction of copper and nickel oxides debris extracted from the substrate, fretting wear process drops ECR endurance....
In automotive applications, the low current electronical connectors need to maintain low and stable electrical contact resistance. However, they are subject to vibrations that cause severe fretting wear damage which increases the electrical contact resistance and degrades information transmission. In addition to small fretting oscillations, the connectors are subject to large clipping/unclipping operations...
The main requirement of materials used in electrical connectors is to allow low and undisturbed electrical contact resistance. However due to engine vibrations and thermal fluctuations, fretting wear damage can occur in the interface, reducing the electrical conductivity. In this paper the electrical performance of pure silver coatings deposited on a Ni interlayer and CuSn4 substrate, submitted to...
Materials used in the connectors in cars are expected to have very low and stable electrical resistance and high resistance against corrosion. The environmental and mechanical factors strongly influence mentioned parameters. Thus numerous coating systems consisting of pure metallic materials, noble and non noble, doped as well as soft coatings were developed and studied. In this work the degradation...
The industrial demand for higher reliability of various components is one of the main flywheels of the research and development in the field of modelling of complex phenomena. There is a need to characterize the wear behaviour of the interface under fretting wear conditions in ball bearing application. Pre-treated experimental data was used to determine the wear of contacting surfaces as a criterion...
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