Fretting wear and reliability assessment of gold-plated electrical connectors

Xu, Li; Ling, Sanqiang; Lin, Yanli; Li, D.; Wu, Songbo; Zhai, Guofu

doi:10.1016/j.microrel.2019.06.040

Cited by 10 publications

(3 citation statements)

References 9 publications

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“…Table I provides additional case studies of electronics where Weibull distribution was used to fit the data, and the observed shape parameter values were greater than 1, indicating that only wear-out was observed. Xu et al [98] Gold-plated electrical interconnects >20…”

Section: Wear-out Periodmentioning

confidence: 99%

An Assessment of Validity of the Bathtub Model Hazard Rate Trends in Electronics

et al. 2021

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The bathtub model has often been cited as a hazard rate profile that predicts not only human mortality but also the hazard rate of manufactured products. This paper examines the inapplicability of the bathtub model to predict the hazard rate of electronic components, products, and systems. The paper reviews various literature and uses numerous experiments and field failure data to support its argument. The factors affecting the hazard rate of electronics are then discussed, common hazard rate trends for electronics are identified, and recommendations for the assessment of hazard rates are given. This paper recommends that a preconceived model of hazard rate over time should not be used.

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Section: Wear-out Periodmentioning

confidence: 99%

An Assessment of Validity of the Bathtub Model Hazard Rate Trends in Electronics

et al. 2021

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“…Pan et al 3 established a contact performance degradation model for electrical connectors based on the winner process under random vibration stress, and established the relationship between contact life and vibration magnitude through carrying out stepped stress accelerated degradation test, which realized the rapid contact reliability assessment of the electrical connector under the vibration environment. Xu et al 4 established a contact performance degradation model and reliability assessment model for electrical connectors based on the mechanism of contact performance degradation under fretting wear conditions. Through fretting cycle test, they obtained the variation law of contact reliability with fretting cycle under different fretting amplitude.…”

Section: Introductionmentioning

confidence: 99%

Contact reliability modeling and assessment of electrical connectors with multi-aperture slotted leaf spring contacts

Qian

Chen

et al. 2023

Advances in Mechanical Engineering

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Multi-aperture electrical connectors are widely used in the aerospace system to provide high-reliability and high-quality connections. The existing reliability assessment methods only focus on the single-aperture electrical connectors, and ignored the influence of the aperture difference on the reliability of electrical connectors, which may lead to errors in the evaluation results. In order to assess the contact reliability of multi-aperture electrical connectors at storage environment, this paper build a mathematical relationship between structure parameter of contact pairs and contact force by analyzing the slotted leaf spring jack reed structure of the contact pair and using the cantilever beam model. Based on the growth law of the oxide layer on the surface of the contact pair, the degradation trajectory model of the contact pair performance was set up which incorporating the structure parameters of contact pairs, such as pin diameter, reed length, radius of curvature of the inner and outer surfaces, and the acceleration model was established by combining the Arrhenius equation. Then based on the established degradation trajectory model, the degradation failure distribution model of contact pairs was derived, and the contact reliability evaluation model of multi-aperture electrical connectors was established by using the weakest ring model. The test scheme of constant stress accelerated degradation of electrical connectors was formulated and carried out. Finally, this paper verified the correctness of the model through analyzing the test data, and obtained the reliable life of multi-aperture electrical connectors under the storage environment temperature, which realized the contact reliability assessment of multi-aperture electrical connectors.

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“…Ni Jing et al carried out accelerated reliability tests on electrical connectors; statistically analyzed the environmental temperature, mating speed, and mating cycle; and established evolution curves for the ECR and wear volume [22]. L. Xu et al explored the variation process of ECR with fretting cycling, determined the instantaneous ECR function for the contact position of electrical contact parts, and proposed a contact performance degradation mechanism and a degradation equivalent circuit model [23]. Huang Bo et al established a fretting wear model using finite elements for a fretting rectangular electrical connector and predicted the fretting wear life of stranded pins/sockets considering the initial socket stress [24].…”

Section: Introductionmentioning

confidence: 99%

Research on the Influence of the Closing Amount of Electrical Connector Contacts on Fretting Wear under a Vibration Environment

et al. 2023

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As a key component for transmitting electrical signals, the electrical contact performance of electrical connectors is directly affected by the closing amount of the socket. It is urgent to explore the relationship between contact resistance and the closing amount of cylindrical groove electric connectors, as well as the range of the closing amount when their comprehensive performance is optimal in vibration environments. Based on Hertz contact theory, the long- and short-axis parameters of the contact elliptical surface were obtained using the Boussinesq solution and the contact deformation coordination equation. An electrical contact resistance (ECR) theoretical model was obtained using Holm’s electric contact theory and the GW contact model. According to the ECR and long- and short-axis parameters of the contact elliptical surface and the theoretical model of contact resistance, an ECR model based on changes in the initial closing amount (deflection) of the socket spring was established by introducing the cantilever beam model of the socket spring. Then, the failure mechanism of fretting wear and the change mechanism of the ECR of the electrical connectors under a vibration environment were analyzed using the sinusoidal vibration test of electric connectors. The optimal range of the initial closing amount of the cylindrical-groove-closing-type electrical connector socket spring was determined, providing a reference for the reliability designs of electrical connectors.

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Fretting wear and reliability assessment of gold-plated electrical connectors

Cited by 10 publications

References 9 publications

An Assessment of Validity of the Bathtub Model Hazard Rate Trends in Electronics

An Assessment of Validity of the Bathtub Model Hazard Rate Trends in Electronics

Contact reliability modeling and assessment of electrical connectors with multi-aperture slotted leaf spring contacts

Research on the Influence of the Closing Amount of Electrical Connector Contacts on Fretting Wear under a Vibration Environment

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