A Method for the Identification of the Types of Macrofracture of Structural Materials by the Parameters of the Wavelet Transform of Acoustic-Emission Signals

作者：Nazarchuk Z T; Skal's'kyi V R; Stankevych O M^*

来源：Materials Science, 2014, 49(6): 841-848.

DOI：10.1007/s11003-014-9682-y

• fracture
• acoustic emission
• continuous wavelet transformation
• criterion for the identification of the types of fracture

We study the specific features of acoustic-emission signals accompanying the macrofractures of materials with different structures. For this purpose, we use the results of the analysis of the local features of acoustic-emission signals by using their continuous wavelet transforms. According to the criterion used for the identification of the types of macrofracture, we analyze brittle, ductile-brittle, and ductile fractures. We also establish the typical differences between signals according to the frequency bandwidth, duration of emission, and changes in the values of predominant frequency.

• 出版日期2014-5