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Hubble space telescope metallized teflon(registered trademark) fep thermal control materials: on-orbit degradation and post-retrieval analysis
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Hansen, Patricia A. Banks, B. deGroh, K. K. He, C. Dever, J. A. Wang, L. Townsend, Jacqueline A. |
| Copyright Year | 1988 |
| Description | During the Hubble Space Telescope (HST) Second Servicing Mission (SM2), degradation of unsupported Teflon(Registered Trademark) FEP (fluorinated ethylene propylene), used as the outer layer of the multilayer insulation (MLI) blankets, was evident as large cracks on the telescope light shield. A sample of the degraded outer layer was retrieved during the mission and returned to Earth for ground testing and evaluation. The results of the Teflon(Registered Trademark) FEP sample evaluation and additional testing of pristine Teflon(Registered Trademark) FEP led the investigative team to theorize that the HST damage was caused by thermal cycling with deep-layer damage from electron and proton radiation which allowed the propagation of cracks along stress concentrations , and that the damage increased with the combined total dose of electrons, protons, UV and x-rays along with thermal cycling. This paper discusses the testing and evaluation of the retrieved Teflon(Registered Trademark) FEP. |
| File Size | 9634541 |
| Page Count | 40 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19990024887 |
| Archival Resource Key | ark:/13960/t1fj7c31n |
| Language | English |
| Publisher Date | 1988-01-01 |
| Access Restriction | Open |
| Subject Keyword | Nonmetallic Materials Degradation Protons Stress Concentration Insulation Ground Tests X Rays Hubble Space Telescope Thermal Cycling Tests Electron Radiation Electrons Teflon Trademark Crack Propagation Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
