Analysis of AE parameters of waveguide rod at different loading rates under three-point bending

doi:10.16265/j.cnki.issn1003-3033.2021.10.022

Abstract

Abstract: In order to explore change characteristics of AE signal related parameters during sliding process inside slopes, and to predict their sliding rates, three-point bending tests of sand-filled active waveguide rods were carried out under different loading rates. Then, relationship between AE parameters, such as amplitude, b-value, ringing count, energy and main frequency amplitude, and loading rate was analyzed. The results show that amplitude of AE signals increases gradually while b value decreases along with the increase of loading rate. Ringing count increases linearly with the rise of loading time, and its growth rate increases in a power function as loading rate increases, while energy increases in an exponential function with that of loading time. Moreover, main frequency amplitude increases with that of loading time and loading rate, and its changes are more significant in low frequency and middle and low frequency bands (20-200 kHz).

Key words: loading rate, waveguide rod, three-point bending, acoustic emission(AE), ringing count

CLC Number:

X936

WU Xin, WANG Xuemei, LUO Xiaoyu, ZHU Xu, LIN Huali. Analysis of AE parameters of waveguide rod at different loading rates under three-point bending[J]. China Safety Science Journal, 2021, 31(10): 159-166.

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