Abstract
In the fracture process of the s.f.c, the number of AE events is in a good agreement with the number of fiber breakage, and the sources of AE signals are the failure modes at fiber breakages. Using the proposed time-frequency method of wavelet transform (WT) for AE signals processing, the micro failure modes at a fiber breakage and the microfracture mechanism, such as the sequence of each failure mode and their interaction, are made clearer. These give that the both processing methods of AE signals, FFT and WT, are powerful to identify the micro failure modes and elucidate the microfracture mechanisms in composite materials.
