국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	Comparison of Adhesion and Retention Forces for Two Candidate Docking Seal Elastomers
저자	Hartzler, Brad D.;; Panickar, Marta B.;; Wasowski, Janice L.;; Daniels, Christopher C.
Keyword	ADHESION;; ADHESIVES;; ELASTOMERS;; FAILURE;; LOADS (FORCES); LOSSES;; OPERATING TEMPERATURE;; SILICONES;; SPACECRAFT DOCKING;; VACUUM
URL	http://hdl.handle.net/2060/20110016525
보고서번호	NASA/CR-2011-217109
발행년도	2011
출처	NTRS (NASA Technical Report Server)
ABSTRACT	To successfully mate two pressurized vehicles or structures in space, advanced seals are required at the interface to prevent the loss of breathable air to the vacuum of space. A critical part of the development testing of candidate seal designs was a verification of the integrity of the retaining mechanism that holds the silicone seal component to the structure. Failure to retain the elastomer seal during flight could liberate seal material in the event of high adhesive loads during undocking. This work presents an investigation of the force required to separate the elastomer from its metal counter-face surface during simulated undocking as well as a comparison to that force which was necessary to destructively remove the elastomer from its retaining device. Two silicone elastomers, Wacker 007-49524 and Esterline ELASA-401, were evaluated. During the course of the investigation, modifications were made to the retaining devices to determine if the modifications improved the force needed to destructively remove the seal. The tests were completed at the expected operating temperatures of -50, +23, and +75 C. Under the conditions investigated, the comparison indicated that the adhesion between the elastomer and the metal counter-face was significantly less than the force needed to forcibly remove the elastomer seal from its retainer, and no failure would be expected.