Abstract
While optical microscopy on riveted specimens reveals only surface cracks, the acoustic C-scan images reveal subsurface and buried cracks emerging to the surface. This is of particular interest for fatigue cracks that initiate below the outer surface such as with chamfered riveted panels. Fatigue crack initiation and growth in riveted panels of Alclad 2024-T3 were characterized using optical microscopy and scanning acoustic microscopy to obtain C-scan images. The C-scan images were obtained using a focused transducer with a center frequency of ca 50 MHz, and the peak value of the back surface echo of the plate with countersunk rivet holes was recorded in the C-scan images. Data on the initiation and development of fatigue cracks at rivets in riveted Alclad 2024-T3 are given.
| Original language | English (US) |
|---|---|
| Pages (from-to) | S331-S338 |
| Journal | International Journal of Fatigue |
| Volume | 19 |
| Issue number | Suppl 1 |
| DOIs | |
| State | Published - 1997 |
| Externally published | Yes |
| Event | Proceedings of the 1996 1st International Conference on Fatigue Damage in Structural Materials - Hyannis, MA, USA Duration: Sep 22 1996 → Sep 27 1996 |
Funding
This research was funded by the Federal Aviation Administration and the National Science Foundation by a fellowship to Z. M. Connor. We are grateful to Lynette Karabin from Alcoa for providing the material. We would like to thank David Hsu of Iowa State University for the initial C-scan images which he obtained on specimens from this research. We also wish to thank Richard Dojutrek from Northwestern University for machining the specimens.
ASJC Scopus subject areas
- Modeling and Simulation
- General Materials Science
- Mechanics of Materials
- Mechanical Engineering
- Industrial and Manufacturing Engineering