Abstract：Static tensile test of two dimensional C/SiC composite material was carried out at room temperature and the damage processes was on-line monitored by an acoustic emission instrument. From the SEM observation, five damage modes were found during the tension, which are matrix cracking, interfacial debonding, delamination, individual fiber breakage, and fiber bundle breakage. Acoustic emission (AE) signals were analyzed by using K-means cluster method to identify these five classes of damage modes and to determine the center value of the AE parameters of these five classes damage modes. Then damage evolution is described through analyzing the cumulative count of AE events and cumulative energy change with loading time.
2014, Vol. 35 
