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Investigation of thermal fatigue in fiber composite materials. [(thermal cycling tests)
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Cunningham, T. G. Fahmy, A. A. |
| Copyright Year | 1976 |
| Description | Graphite-epoxy laminates were thermally cycled to determine the effects of thermal cycles on tensile properties and thermal expansion coefficients of the laminates. Three 12-ply laminate configurations were subjected to up to 5,000 thermal cycles. The cumulative effect of the thermal cycles was determined by destructive inspection (electron micrographs and tensile tests) of samples after progressively larger numbers of cycles. After thermal cycling, the materials' tensile strengths, moduli, and thermal expansion coefficients were significantly lower than for the materials as fabricated. Most of the degradation of properties occurred after only a few cycles. The property degradation was attributed primarily to the progressive development of matrix cracks whose locations depended upon the layup orientation of the laminate. |
| File Size | 1651969 |
| Page Count | 62 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19760020280 |
| Archival Resource Key | ark:/13960/t72v7b39f |
| Language | English |
| Publisher Date | 1976-07-01 |
| Access Restriction | Open |
| Subject Keyword | Composite Materials Tensile Tests Thermal Cycling Tests Thermal Fatigue Modulus of Elasticity Fibers Fabrication Epoxy Compounds Graphite Cracking Fracturing Microstructure Tensile Properties Thermal Stresses 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 |
