Loading...
Please wait, while we are loading the content...
Similar Documents
Measuring ultrasonic acoustic velocity in a thin sheet of graphite epoxy composite
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Copyright Year | 2008 |
| Description | A method for measuring the acoustic velocity in a thin sheet of a graphite epoxy composite (GEC) material was investigated. This method uses two identical acoustic-emission (AE) sensors, one to transmit and one to receive. The delay time as a function of distance between sensors determines a bulk velocity. A lightweight fixture (balsa wood in the current implementation) provides a consistent method of positioning the sensors, thus providing multiple measurements of the time delay between sensors at different known distances. A linear fit to separation, x, versus delay time, t, will yield an estimate of the velocity from the slope of the line. |
| File Size | 2217260 |
| Page Count | 2 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20090022241 |
| Archival Resource Key | ark:/13960/t02z66p56 |
| Language | English |
| Publisher Date | 2008-03-03 |
| Access Restriction | Open |
| Subject Keyword | Acoustic Measurement Measuring Instruments Acoustic Velocity Acoustic Emission Graphite-epoxy Composites Ultrasonics Time Lag Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
