Abstract
The fracture process of 3D four-directional carbon/epoxy braided composites with different braiding angles under the monotonic compressive loading were investigated by the acoustic emission (AE) technique. The cumulative AE energy, event rate, amplitude, and the peak frequency of a dominant frequency band after treated with the fast Fourier transform (FFT) were analyzed. At the same time, combining with the load-displacement curve varying feature, the fracture processes were divided into different stages to deeply understand the damaged mechanisms of the textile composites. Furthermore, the fracture surfaces of the specimens were observed under optical microscopy. Results reveal that the behavior of AE parameters described well the fracture process in the 3D braided composites with different braiding angles, and the damage mechanisms of the composites can be successfully identified by AE characteristics.
| Original language | English |
|---|---|
| Pages (from-to) | 22-28 |
| Number of pages | 7 |
| Journal | Journal of Materials Engineering |
| Issue number | 2 |
| DOIs | |
| State | Published - Feb 2013 |
Keywords
- 3D four-directional
- Acoustic emission
- Braided composite
- Compressive loading
- Fracture
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