Leakage Assessment for Electronic Connectors
Date Issued
2016
Date
2016
Author(s)
Huang, Yen-Wen
Abstract
Systematic procedures are developed to investigate sealing characteristics of a so-called 2-in-1 electronic connector applied to audio equipments in the present study. A silicon elastomer gasket located between a plastic housing of the connector and a back-cover of the audio equipment will be squeezed to provide the sealing function when the back-cover is displaced at a designated position. Gas is subsequently pumped into the confined chamber up to the specific pressure while the internal pressure is continuously monitored. Leakage indicated by the pressure loss percentage however could occur through the gasket after a certain period. A finite element analysis is carried out to explore the time-dependent response of the silicon elastomer gasket. The Mooney-Rivlin and the Prony series constitutive models are adopted in the numerical simulations to account for the hyperelasticity and the stress-relaxation behaviors of the gasket material, respectively. Required parameters of these mathematical models are evaluated based on experimental measurements of the specified silicon elastomer specimen subjected to both the uniaxial compression-relaxation and tensile-relaxation loading conditions. Sealing performances can then be assessed by implementing variations of the contact stress of the critical point of the gasket over the relatively long period into a proposed leakage rate prediction model. Pressure loss percentages in the chamber based on the numerical calculations agree well with those based on the corresponding experiments. In order to validate the appropriateness of the current systematic procedures, the pressure loss percentage of an enclosed cavity of an audio jack connector is also evaluated here.
Subjects
leakage
elastomer gasket
electronic connector
finite element analysis
SDGs
Type
thesis
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ntu-105-R03631023-1.pdf
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