| タイトル | Hydrogen Permeability of Polymer Matrix Composites at Cryogenic Temperatures |
| 本文（外部サイト） | http://hdl.handle.net/2060/20050199401 |
| 著者（英） | Grenoble, Ray W.; Gates, Thomas S |
| 著者所属（英） | NASA Langley Research Center |
| 発行日 | 2005-01-01 |
| 言語 | eng |
| 内容記述 | This paper presents experimental methods and results of an ongoing study of the correlation between damage state and hydrogen gas permeability of laminated composite materials under mechanical strains and thermal loads. A specimen made from IM-7/977-2 composite material has been mechanically cycled at room temperature to induce microcrack damage. Crack density and tensile modulus were observed as functions of number of cycles. Damage development was found to occur most quickly in the off-axis plies near the outside of the laminate. Permeability measurements were made after 170,000 cycles and 430,000 cycles. Leak rate was found to depend on applied mechanical strain, crack density, and test temperature. |
| NASA分類 | Composite Materials |
| レポートNO | AIAA Paper 2005-2086 |
| 権利 | No Copyright |
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