In order to address the issues of life evaluation for polyurethane sealing elements used in electrical connectors during prolonged storage conditions,the underlying mechanism behind cohe-sion failure and boundary failure that contributed to performance degradation of these seals was ana-lyzed.The reliability statistical model of polyurethane sealing elements for electrical connectors,es-tablished at the mechanism level,was validated at a statistical level by comprehensively applying par-ticle swarm optimization algorithm and regression analysis,AD test and goodness of fit test methods to the comprehensive stress accelerated degradation data of temperature and humidity on polyurethane sealing elements.The validity of the failure mechanism analysis was confirmed through SEM and EDS techniques.Ultimately,the developed model was employed to assess the reliable lifespan of polyure-thane adhesive seals for electrical connectors under the storage environment.
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