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Assessing mmod impacts on seal performance
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Daniels, C. deGroh II, Henry C. Steinetz, B. Dunlap, P. |
| Copyright Year | 2007 |
| Description | The elastomer seal needed to seal in cabin air when NASA s Crew Exploration Vehicle is docked is exposed to space prior to docking. While open to space, the seal might be hit by orbital debris or meteoroids. The likelihood of damage of this type depends on the size of the particle. Our campaign is designed to find the smallest particle that will cause seal failure resulting in loss of mission. We will then be able to estimate environmental risks to the seal. Preliminary tests indicate seals can withstand a surprising amount of damage and still function. Collaborations with internal and external partners are in place and include seal leak testing, modeling of the space environment using a computer code known as BUMPER, and hypervelocity impact (HVI) studies at Caltech. Preliminary work at White Sands Test Facility showed a 0.5 mm diameter HVI damaged areas about 7 times that diameter, boring deep (5 mm) into elastomer specimens. BUMPER simulations indicate there is a 1 in 1440 chance of getting hit by a particle of diameter 0.08 cm for current Lunar missions; and 0.27 cm for a 10 year ISS LIDS seal area exposure. |
| File Size | 980157 |
| Page Count | 24 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20080012734 |
| Archival Resource Key | ark:/13960/t06x4b44b |
| Language | English |
| Publisher Date | 2007-11-13 |
| Access Restriction | Open |
| Subject Keyword | Space Transportation And Safety Leakage Seals Stoppers Space Debris Simulation Elastomers Risk Exposure Crew Exploration Vehicle Meteoroids Failure Hypervelocity Impact Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
