Abstract
Scattering of ultrasonic signals by a sub-surface crack in a specimen which is immersed in a water bath has been analysed on the basis of a mathematical model, which accounts for: (1) signal transmission across the water-solid interface; (2) partial illumination of the crack; (3) the relaiton between the crack-opening displacement and the received transducer signal; and (4) an accurate mathematical computation of the crack-opening displacement in the frequency domain. The modelling from the specified initial electrical pulse to the measured scattered signal is completed by converting the frequency-domain results to the time domain. Results are presented for both the pulse-echo and the pitch-catch configuration, and for a number of crack orientations and crack depths.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 207-215 |
| Number of pages | 9 |
| Journal | Ultrasonics |
| Volume | 24 |
| Issue number | 4 |
| DOIs | |
| State | Published - Jul 1986 |
Funding
The work presentedh erewas carried out in the course of r e s e a r c hs p o n s o r e db y the National Science Foundation (Grant MEA-8208972)a nd the US Army ResearchO ffice (Contract DAAG29-84-K-0163).
Keywords
- crack characterization
- models
- wave scattering
ASJC Scopus subject areas
- Acoustics and Ultrasonics