Concerning reliability modeling of connectors

Mroczkowski, Robert

doi:10.1109/holm.1998.722428

Cited by 17 publications

(4 citation statements)

References 13 publications

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“…This response is determined in part by factors such as surface topography, stress distribution, uniformity of inhibitor distribution in the electrical interfaces etc. [9]- [12]. The inhibitor used in this investigation differed from one connector type to another.…”

Section: A Connector Behaviormentioning

confidence: 99%

Environmental degradation of utility power connectors in a harsh environment

Callen¹,

Johnson²,

King³

et al. 2000

IEEE Trans. Comp. Packag. Technol.

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This paper reports on an investigation of the effects of a marine atmospheric environment on the performance of aluminum bolted, compression, and fired wedge power connectors. These connector types are representative of the three major connector technologies used in electrical distribution systems throughout the world. The atmospheric test site was situated on the seacoast in Daytona Beach, FL. The test specimens consisted of sections of aluminum and copper conductors joined together by a connector.The paper describes the performance and lifetime of the different connector types exposed to the harsh marine environment. Examinations of failed connectors revealed that failure in all three connector types was ultimately due to galvanic corrosion at the aluminum/copper interfaces within the connectors. The failure rate was largest for compression connections. Bolted connections failed somewhat less rapidly. The failure rate for fired-wedge connections was the lowest.

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Section: A Connector Behaviormentioning

confidence: 99%

Environmental degradation of utility power connectors in a harsh environment

Callen¹,

Johnson²,

King³

et al. 2000

IEEE Trans. Comp. Packag. Technol.

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show abstract

“…During the whole design process, the analysis of reliability is very important and necessary. Early, Mroczkowski has been aware that [9] and stated that designers should relate the performance parameters of connector to degradation mechanisms to assist the design and evaluation of reliability. According to the detailed discussion on the usage of a comprehensive degradation model, Mroczkowski exhibited the advantages and potential of the physics of failure (POF) method compared with the traditional statistics-based method for fast and accurate reliability design and evaluation.…”

Section: Introductionmentioning

confidence: 99%

A Systematic Approach for the Reliability Evaluation of Electric Connector

Wang

Zhou

2021

Journal of Electrical and Computer Engineering

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Under the trend of high density and miniaturization, the current that the connector transmits per unit volume is getting higher and higher, which makes the reliability design of the connector more challenging. Under the pressure of high performance and low cost requirements, the design has to be more accurate and more efficient. Thus, in the design process, a systematic approach for reliability evaluation is required. However, there is no valid enough approach that is integrated, well-organized, and quantitative. In this article, a systematic approach for the reliability evaluation of connector was proposed, and by applying it on a typical object named a blade-spring connector, the validity of this approach was verified. After the framework of this approach has been established, the methods and models needed were provided, including the method to build up material selection criterion and the assessment models of stress relaxation, thermal diffusion, and sliding wear, respectively. Then, the feasibility of a newly developed copper alloy on the connector and the reliability behaviors of this connector were determined through this approach. The unsatisfactory aspects of reliability were pointed out and some possible redesign choices were provided. Results and discussion revealed that the proposed approach is a helpful tool for designing electric connectors, especially on the reliability design.

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“…Under such working or reserving conditions, contact failure is the most prevalent failure mechanism of electrical connectors. There are three types of failure (degradation) mechanisms: 1) corrosion; 2) wear; and 3) stress relaxation (loss of normal force) [3], [4]. Corrosion and wear are related with contact finish and its physics; and stress relaxation is related with contact materials selection and design.…”

Section: Introductionmentioning

confidence: 99%

“…While with longer connector lifetime, the degradation model applied widely replaced of lifetime model. Based on a study on modeling of connector degradation mechanisms, an alternative approach has been proposed in [3] and [4] to link connector degradation with reliability by an extreme-value assessment performed with failure test data. This approach is included in the British Standard BS-IEC-61586 1997 Assessment of the reliability of electrical connectors [11].…”

Section: Introductionmentioning

confidence: 99%

A Novel Model of Reliability Assessment for Circular Electrical Connectors

Ren

2015

IEEE Trans. Compon., Packag. Manufact. Technol.

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The reliability of circular electrical connectors was usually assessed according to standards like MIL-HDBK-217 (Reliability Prediction of Electronic Equipment). Given to their limitations and mislead results, a new assessment method needs to be presented. Some concerns on the physics of failure (PoF) modeling and reliability assessment of circular electrical connectors are addressed in this paper to overcome this defect. An original approach combining laboratory accelerated degradation testing (ADT) and PoF modeling is proposed for effectively assessing connector reliability. Random vibration and current stress are selected as acceleration factors that affect the contact life of electrical connectors. Then, an appropriate multiple-stresses ADT scheme is derived. The PoF model for electrical connectors under multiple stresses yielded the generalized Eyring relationship. According to the system reliability model for multiposition connectors, connectors' life follows Weibull distribution, which is derived from extreme-value distribution theory. Through ADT and data gained from tests, statistical analysis result yielded the estimated value of reliability character of MIL-C-38999 I series electrical connectors under the action of vibration and current stresses.

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Concerning reliability modeling of connectors

Cited by 17 publications

References 13 publications

Environmental degradation of utility power connectors in a harsh environment

Environmental degradation of utility power connectors in a harsh environment

A Systematic Approach for the Reliability Evaluation of Electric Connector

A Novel Model of Reliability Assessment for Circular Electrical Connectors

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