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Relation of ultrasonic energy loss factors and constituent properties in unidirectional composites. [graphite-epxoy composite materials
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Nayebhashemi, H. Lee, S. S. Williams Jr., J. H. |
| Copyright Year | 1979 |
| Description | A model is developed relating composite constituents properties with ultrasonic energy loss factors for longitudinal waves propagating in the principal directions of a unidirectional graphite/epoxy fiber composite. All the constituents are assumed to behave as linear viscoelastic materials with energy dissipation properties defined by loss factors. It is found that by introducing a new constituent called the interface material, the composite and constituent properties can be brought into consistency with simple series and parallel models. An expression relating the composite loss factors to the loss factors of the constituents is derived and its coefficients are evaluated. |
| File Size | 1252288 |
| Page Count | 29 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19800005622 |
| Archival Resource Key | ark:/13960/t79s6k144 |
| Language | English |
| Publisher Date | 1979-12-01 |
| Access Restriction | Open |
| Subject Keyword | Acoustics Viscoelasticity Nondestructive Tests Wave Propagation Wave Attenuation Ultrasonic Tests Energy Dissipation Longitudinal Waves Graphite-epoxy Composites Mathematical Models 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 |
