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Space Environment's Effects on Seal MaterialsA Low Impact Docking System (LIDS) is being developed by the NASA Johnson Space Center to support future missions of the Crew Exploration Vehicle (CEV). The LIDS is androgynous, such that each system half is identical, thus any two vehicles or modules with LIDS can be coupled. Since each system half is a replica, the main interface seals must seal against each other instead of a conventional flat metal surface. These sealing surfaces are also expected to be exposed to the space environment when vehicles are not docked. The NASA Glenn Research Center (NASA GRC) is supporting this project by developing the main interface seals for the LIDS and determining the durability of candidate seal materials in the space environment. In space, the seals will be exposed to temperatures of between 50 to 50 C, vacuum, atomic oxygen, particle and ultraviolet radiation, and micrometeoroid and orbital debris (MMOD). NASA GRC is presently engaged in determining the effects of these environments on our candidate elastomers. Since silicone rubber is the only class of seal elastomer that functions across the expected temperature range, NASA GRC is focusing on three silicone elastomers: two provided by Parker Hannifin (S0-899-50 and S0-383-70) and one from Esterline Kirkhill (ELA-SA-401). Our results from compression set, elastomer to elastomer adhesion, and seal leakage tests before and after various simulated space exposures will be presented.
Document ID
20080003834
Document Type
Conference Paper
Authors
deGroh, Henry C., III (NASA Glenn Research Center Cleveland, OH, United States)
Daniels, Christopher C. (Akron Univ. Akron, OH, United States)
Dunlap, Patrick (NASA Glenn Research Center Cleveland, OH, United States)
Miller, Sharon (NASA Glenn Research Center Cleveland, OH, United States)
Dever, Joyce (NASA Glenn Research Center Cleveland, OH, United States)
Waters, Deborah (ASRC Aerospace Corp. Cleveland, OH, United States)
Steinetz, Bruce M. (NASA Glenn Research Center Cleveland, OH, United States)
Date Acquired
August 24, 2013
Publication Date
October 1, 2007
Publication Information
Publication: 2006 NASA Seal/Secondary Air System Workshop; Volume 1
Subject Category
Mechanical Engineering
Distribution Limits
Public
Copyright
Public Use Permitted.

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IDRelationTitle20080003817Analytic Primary2006 NASA Seal/Secondary Air System Workshop; Volume 1