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Effect of propagation distance on acoustic emission of carbon fiber/epoxy composites.
- Source :
- Structural Health Monitoring; Nov2021, Vol. 20 Issue 6, p3342-3353, 12p
- Publication Year :
- 2021
-
Abstract
- This study examined the change in acoustic emission as a function of measurement position of fiber-reinforced composites. Single-edge-notched carbon fiber/epoxy composites were prepared and tested under cyclic loading, with sensors located at specific distances from the end of the notch. Although the I b -value increased overall, the degree of increase significantly varied with position and acoustic emission frequency. Notably, the proportion of acoustic emission signals for each failure mode varied due to a high attenuation rate at high frequencies, which increased the I b -value. Accordingly, the high-frequency fiber-failure signals significantly affected the I b -value. This study focused on the importance of analyzing acoustic emission signals by considering the crack location and frequency-dependent attenuation rate. We concluded that an acoustic emission sensor should be located 20–40 mm from the crack location for woven carbon fiber/epoxy composites. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 14759217
- Volume :
- 20
- Issue :
- 6
- Database :
- Complementary Index
- Journal :
- Structural Health Monitoring
- Publication Type :
- Academic Journal
- Accession number :
- 153532690
- Full Text :
- https://doi.org/10.1177/1475921720986156