Research on Acoustic Emission Characteristics of Bending Failure of Timber with Different Service Life

YUAN Xiaocong; ZHOU Zhanxue; JIANG Yibo; CHANG Yu; WU Kai

doi:10.13204/j.gyjzG21121307

Volume 52 Issue 7

Oct. 2022

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YUAN Xiaocong, ZHOU Zhanxue, JIANG Yibo, CHANG Yu, WU Kai. Research on Acoustic Emission Characteristics of Bending Failure of Timber with Different Service Life[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(7): 113-118. doi: 10.13204/j.gyjzG21121307

Citation:

YUAN Xiaocong, ZHOU Zhanxue, JIANG Yibo, CHANG Yu, WU Kai. Research on Acoustic Emission Characteristics of Bending Failure of Timber with Different Service Life[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(7): 113-118. doi: 10.13204/j.gyjzG21121307

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Research on Acoustic Emission Characteristics of Bending Failure of Timber with Different Service Life

doi: 10.13204/j.gyjzG21121307

1. College of Civil Engineering, the University of Architecture, Zhangjiakou 075000, China;
2. Hebei Key Laboratory of Civil Engineering Diagnosis, Transformation and Disaster Resistance, Zhangjiakou 075000, China

Received Date: 2021-12-13
Available Online: 2022-10-28

Abstract

Abstract

In order to explore the evolution law of acoustic emission in the process of bending damage of timber with different service life, three groups of wood with different service life were prepared for three-point bending acoustic emission test. The paper studied the correlation between the bearing process of timber with the characteristics of acoustic emission parameters, and deeply analyzed the evolution of acoustic emission dominant frequency and energy characteristics precursors before timber instability and failure. The test results showed that the service life of timber affected the acoustic emission activity, and the change of acoustic emission parameters could reflect the internal damage of timber, so as to indirectly reflect the service state of timber; the service life affected the main frequency distribution to a certain extent. The main frequency was mainly distributed in 0-200 kHz, which was obviously distributed in segments. The main frequency distribution of timber with long service life was relatively discrete; the change of energy in each frequency band of each group of specimens in the damage process corresponded to different specimen states. When the proportion of medium and low frequency band was relatively high, it was mainly elastic deformation, and when the proportion of high frequency band was relatively high, it indicated the fracture of specimens, which had a certain value for predicting timber fracture.
- ancient timber,
- service life,
- acoustic emission characteristics,
- ring count,
- spectrum analysis,
- wavelet packet decomposition

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References(18)

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