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Effect of stress on energy flux deviation of ultrasonic waves in ultrasonic waves in gr/ep composites
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Prosser, William H. Kriz, R. D. Fitting, Dale W. |
| Copyright Year | 1990 |
| Description | Ultrasonic waves suffer energy flux deviation in graphite/epoxy because of the large anisotropy. The angle of deviation is a function of the elastic coefficients. For nonlinear solids, these coefficients and thus the angle of deviation is a function of stress. Acoustoelastic theory was used to model the effect of stress on flux deviation for unidirectional T300/5208 using previously measured elastic coefficients. Computations were made for uniaxial stress along the x3 axis fiber axis) and the x1 axis for waves propagating in the x1x3 plane. These results predict a shift as large as three degrees for the quasi-transverse wave. The shift in energy flux offers new nondestructive technique of evaluating stress in composites. |
| File Size | 274442 |
| Page Count | 5 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20040121063 |
| Archival Resource Key | ark:/13960/t1gj4d711 |
| Language | English |
| Publisher Date | 1990-01-01 |
| Access Restriction | Open |
| Subject Keyword | Composite Materials Transverse Waves Anisotropy Nonlinearity Solids Graphite-epoxy Composites Ultrasonic Radiation Coefficients Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
