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Fiber reinforced pmr polyimide composites
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Cavano, P. J. Winters, W. E. |
| Copyright Year | 1978 |
| Description | Commercially obtained PMR-15 polyimide prepregs with S-glass and graphite fiber reinforcements were evaluated along with in-house prepared glass and graphite cloth PMR 2 materials. A novel autoclave approach was conceived and used to demonstrate that both the PMR systems respond to 1.4 MPa (200 psi) autoclave pressures to produce void free composites equivalent to die molded laminates. Isothermal gravimetric analysis and subsequent mechanical property tests indicated that the PMR 2 system was significantly superior in thermo-oxidative stability, and that S-glass reinforcements may contribute to the accelerated degradation of composites at 316 C (600 F) when compared to graphite fiber reinforced composites. Fully reversed bending fatigue experiments were conducted with a type of fixture unused for organic matrix composites. These studies indicated that the graphite fiber composites were clearly superior in fatigue resistance to the glass fiber reinforced material and that PMR matrix composite systems yield performance of the same order as composite materials employing other families of matrices. |
| File Size | 12975776 |
| Page Count | 103 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19780017189 |
| Archival Resource Key | ark:/13960/t9t19t247 |
| Language | English |
| Publisher Date | 1978-05-15 |
| Access Restriction | Open |
| Subject Keyword | Composite Materials Fatigue Tests Polyamide Resins Reinforcing Fibers Graphite Metal Matrix Composites Laminates Isothermal Processes 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 |
