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Measurement of damping of graphite epoxy materials (Document No: 19850015620)
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Crocker, M. J. |
| Copyright Year | 1985 |
| Description | The design of an experiment to measure the damping of a cylindrical graphite-epoxy specimen with a three point support and a knife edge support is described as well as equipment used in tests conducted to determine the influence of the support at the two ends of the specimen and to simulate an idealized free-free boundary condition at the two edges. A curve fitting technique is being used to process the frequency response data obtained. Experiments conducted on the thin plate specimen also reveal the influence of the end support condition on the damping ratio of the specimen. The damping ratio values measured for both specimens appear to be strongly influenced by the shape of the specimen and appear to depend on length and fiber orientation as well as the presence of discontinuities such as sharp bends, corners, and notches. |
| File Size | 3799820 |
| Page Count | 12 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19850015620 |
| Archival Resource Key | ark:/13960/t1bk67v88 |
| Language | English |
| Publisher Date | 1985-04-01 |
| Access Restriction | Open |
| Subject Keyword | Composite Materials Shakers Supports Vibration Damping Cylindrical Bodies Experiment Design Graphite-epoxy Composites Pipes Tubes Frequencies Vibration Tests Edges Thin Plates 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 |
