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Tensile damage mechanisms of carbon fiber composites at high temperature by acoustic emission and fully connected neural network

  • Wei Li

    Wei Li, born in 1970, is a Professor at Northeast Petroleum University, Daqing, China. He was a visiting scholar at the University of Liverpool, UK, from 2014 to 2015. Presently, he is the chairman of the acoustic emission professional group of the China Society of Nondestructive Testing. His research focuses on the safety evaluation of process equipment based on acoustic emissions.

    , Ping Sun

    Ping Sun, born in 1998, has a major in power engineering and engineering thermophysics from Northeast Petroleum University in Daqing, China. She has been pursuing a master’s degree since 2019. Her research focuses on composite tensile damage evaluation in a temperature environment.

    , Yinghonglin Liu

    Yinghonglin Liu, born in 1993, is a student pursuing a Ph.D. degree from Northeast Petroleum University, Daqing, China. She graduated from the China University of Petroleum with a master’s degree. Her research focuses on the delamination damage of composites.

    , Peng Jiang

    Peng Jiang, born in 1981, is an Associate Professor at Northeast Petroleum University, Daqing, China. He is presently the secretary of the acoustic emission professional group of the China Society of Nondestructive Testing. His research focuses on the progressive damage mechanism and damage pattern recognition of carbon fiber composites using acoustic emission.

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    and Xiaowei Yan

    Xiaowei Yan, born in 1992, is a major in mechanical engineering, at Northeast Petroleum University, Daqing, China, and has been pursuing a master’s degree since 2019. His research focuses on acoustic emission waveform analysis and unidirectional tensile properties based on fiber-reinforced materials.

Published/Copyright: June 8, 2022
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Abstract

In this paper, the tensile damage mechanism of carbon fiber composites at high temperatures is analyzed. The acoustic emission technique was employed to monitor the tensile process of specimens. The acoustic emission signals at high and room temperatures were classified based on k-means and the wavelet packet energy spectrum. The results show that the damage mechanisms at high temperatures and room temperature differ. At high temperatures, there is more stress release, the material instability appears earlier, and redistribution occurs in the specimen. The damage mechanisms include matrix cracking, fiber/matrix debonding, and fiber breakage. For damage mechanism identification, the acoustic emission characteristics were used under room temperature and high-temperature conditions in the fully connected neural network, with an accuracy rate of 97.5%. The results indicate that the network is suited for both high temperatures and room temperature and can better identify various damage mechanisms.


Corresponding author: Peng Jiang, Northeast Petroleum University, Daqing, 163318, China, E-mail:

Award Identifier / Grant number: 2017YFC0805604

Award Identifier / Grant number: 2018-QNL-32

About the authors

Wei Li

Wei Li, born in 1970, is a Professor at Northeast Petroleum University, Daqing, China. He was a visiting scholar at the University of Liverpool, UK, from 2014 to 2015. Presently, he is the chairman of the acoustic emission professional group of the China Society of Nondestructive Testing. His research focuses on the safety evaluation of process equipment based on acoustic emissions.

Ping Sun

Ping Sun, born in 1998, has a major in power engineering and engineering thermophysics from Northeast Petroleum University in Daqing, China. She has been pursuing a master’s degree since 2019. Her research focuses on composite tensile damage evaluation in a temperature environment.

Yinghonglin Liu

Yinghonglin Liu, born in 1993, is a student pursuing a Ph.D. degree from Northeast Petroleum University, Daqing, China. She graduated from the China University of Petroleum with a master’s degree. Her research focuses on the delamination damage of composites.

Peng Jiang

Peng Jiang, born in 1981, is an Associate Professor at Northeast Petroleum University, Daqing, China. He is presently the secretary of the acoustic emission professional group of the China Society of Nondestructive Testing. His research focuses on the progressive damage mechanism and damage pattern recognition of carbon fiber composites using acoustic emission.

Xiaowei Yan

Xiaowei Yan, born in 1992, is a major in mechanical engineering, at Northeast Petroleum University, Daqing, China, and has been pursuing a master’s degree since 2019. His research focuses on acoustic emission waveform analysis and unidirectional tensile properties based on fiber-reinforced materials.

  1. Author contribution: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.

  2. Research funding: This study was funded by the Postdoctoral Research Foundation project of Heilongjiang Province (LBH-Q21083).

  3. Conflict of interest statement: The authors declare no conflicts of interest regarding this article.

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Published Online: 2022-06-08
Published in Print: 2022-06-27

© 2022 Walter de Gruyter GmbH, Berlin/Boston

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