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Dynamic response of damaged angleplied fiber composites
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Sinclair, J. H. Lark, R. F. Chamis, C. C. |
| Copyright Year | 1979 |
| Description | The effects of low level damage induced by monotonic load, cyclic load and/or residual stresses on the vibration frequencies and damping factors of fiber composite angleplied laminates were investigated. Two different composite systems were studied - low modulus fiber and ultra high modulus fiber composites. The results obtained show that the frequencies and damping factors of angleplied laminates made from low modulus fiber composites are sensitive to low level damage while those made from ultra high modulus composites are not. Vibration tests may not be sufficiently sensitive to assess concentrated local damage in angleplied laminates. Dynamic response determined from low-velocity impact coupled with the Fast Fourier Transform and packaged in a minicomputer can be a convenient procedure for assessing low-level damage. |
| File Size | 1106556 |
| Page Count | 16 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19800002898 |
| Archival Resource Key | ark:/13960/t3809wr1m |
| Language | English |
| Publisher Date | 1979-01-01 |
| Access Restriction | Open |
| Subject Keyword | Composite Materials Dynamic Response Glass Fiber Reinforced Plastics Minicomputers Cyclic Loads Fiber Composites Graphite-epoxy Composites Laminates Damage Fast Fourier Transformations Residual Stress Stress-strain Diagrams Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
