INVESTIGATION OF STRUCTURAL SEALING PARAMETERS AND CONCEPTS FOR SPACECRAFT. PART 1. DESIGN CRITERIA
Final rept. for 4 Nov 1964-15 Apr 1965
IIT RESEARCH INST CHICAGO IL
Pagination or Media Count:
The many factors that influence the leakage of gases past a seal are discussed and analyzed to apprise the designer of pressurized spacecraft compartments of the problems of achieving and maintaining a seal when extremely low leakage rates are desired. The nature of the leakage path is described, and the ways in which leakage occurs are categorized as interstitial, interfacial, and permeation flow. Methods of predicting leakage for these flow regimes are given with greatest emphasis placed on the interfacial flow phenomenon which is characteristic of lightly loaded, demountable seals. In the experimental phase of this program, the sealing characteristics of elastomers were studied to determine relationships between contact stress and leakage with hardness as a parameter. It is concluded that the analytical techniques presented are applicable to the evaluation or design of spacecraft seals.
- Adhesives, Seals and Binders
- Manned Spacecraft