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Hydrogen permeability of polymer matrix composites at cryogenic temperatures
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Gates Sr., Thomas S. Grenoble, Ray W. |
| Copyright Year | 2005 |
| Description | 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. |
| File Size | 191304 |
| Page Count | 8 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20050199401 |
| Archival Resource Key | ark:/13960/t8wb04q7z |
| Language | English |
| Publisher Date | 2005-01-01 |
| Access Restriction | Open |
| Subject Keyword | Composite Materials Cracks Correlation Polymer Matrix Composites Hydrogen Permeability Cryogenic Temperature Room Temperature Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
