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O-ring sealing verification for the space shuttle redesign solid rocket motor
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Lach, Cynthia L. |
| Copyright Year | 1989 |
| Description | As a part of the redesign of the Space Shuttle Solid Rocket Motor, the field and nozzle-to-case joints were redesigned to minimize the dynamic flexure caused by internal motor pressurization during ignition. The O-ring seals and glands for the joints were designed to accommodate both structural deflections and to promote pressure assistance. A test program was conducted to determine if a fluorocarbon elastomeric O-ring could meet this criteria in the redesigned gland. Resiliency tests were used to investigate the O-ring response to gap motion while static seal tests were used to verify design criteria of pressure assistance for sealing. All tests were conducted in face seal fixtures mounted in servo-hydraulic test machines. The resiliency of the O-ring was found to be extremely sensitive to the effects of temperature. The External Tank/Solid Rocket Booster attach strut loads had a negligible affect on the ability of the O-ring to track the simulated SRB field joint deflection. In the static pressure-assisted seal tests, as long as physical contact was maintained between the O-ring and the gland sealing surface, pressure assistance induced instantaneous sealing. |
| File Size | 5285637 |
| Page Count | 118 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19890016897 |
| Archival Resource Key | ark:/13960/t7bs3pr1h |
| Language | English |
| Publisher Date | 1989-05-01 |
| Access Restriction | Open |
| Subject Keyword | Structural Mechanics Pressure Effects Joints Junctions Deflection Temperature Effects O Ring Seals Ignition Elastomers Solid Propellant Rocket Engines Rocket Engine Design Sealing Flexing Resilience Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
