Chapter 43
The Influence of Rod Waveguide
on Acoustic Emission Signal of Different
Frequencies
Xianglong Zeng, Qiong Deng, Bo Wang, Zhilun Deng, Xudong Wang,
and Chengyu Zhang
Abstract In this study, the influence of rod waveguide on the acoustic emission
(AE) signals of different frequencies was investigated. Two influential factors were
considered: the rod waveguide and the interface between specimen and rod waveguide. Firstly, the attenuation effects of AE signals with different frequencies transmitting in rod waveguide were studied. Secondly, the variation of the wave when the
AE signal went through the interface was studied. The results were compared to the
data gotten in the first step. According to these experiments, the following experimental phenomena can be observed: the energy and amplitude of the acoustic signal
are attenuated by the rod waveguide more strongly with the increase of frequency;
The maximum rates of attenuation respectively reach 98.81% and 99.18%; When the
frequency of signal is less than 300 kHz, the rate of attenuation is within 30%; On
the contrary, the interface enhances the energy and amplitude. According to further
analysis, it can be drawn that when the AE signal is lower than a certain frequency,
the energy, amplitude and frequency are all can be used as characteristic parameters
under the condition of rod waveguide is used. Besides, frequency is a better parameter
than energy and amplitude when the AE signal is higher than the threshold.
43.1 Introduction
As a nondestructive testing (NDT) method, AE detection is widely used to investigate
material damage at elevated temperature. When AE detection is carried out at elevated
X. Zeng · Q. Deng · B. Wang (B) · Z. Deng
School of Aeronautics, Northwestern Polytechnical University, Xi’an 710072, China
e-mail: b.wang@nwpu.edu.cn
X. Wang
Beijing Softland Times Scientific & Technology Co. LTD, Beijing 100083, China
e-mail: AE1616@163.com
C. Zhang
School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an
710072, China
e-mail: cyzhang@nwpu.edu.cn
© The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2021
G. Shen et al. (eds.), Advances in Acoustic Emission Technology, Springer Proceedings
in Physics 259, https://doi.org/10.1007/978-981-15-9837-1_43
487
The Influence of Rod Waveguide
on Acoustic Emission Signal of Different
Frequencies
Xianglong Zeng, Qiong Deng, Bo Wang, Zhilun Deng, Xudong Wang,
and Chengyu Zhang
Abstract In this study, the influence of rod waveguide on the acoustic emission
(AE) signals of different frequencies was investigated. Two influential factors were
considered: the rod waveguide and the interface between specimen and rod waveguide. Firstly, the attenuation effects of AE signals with different frequencies transmitting in rod waveguide were studied. Secondly, the variation of the wave when the
AE signal went through the interface was studied. The results were compared to the
data gotten in the first step. According to these experiments, the following experimental phenomena can be observed: the energy and amplitude of the acoustic signal
are attenuated by the rod waveguide more strongly with the increase of frequency;
The maximum rates of attenuation respectively reach 98.81% and 99.18%; When the
frequency of signal is less than 300 kHz, the rate of attenuation is within 30%; On
the contrary, the interface enhances the energy and amplitude. According to further
analysis, it can be drawn that when the AE signal is lower than a certain frequency,
the energy, amplitude and frequency are all can be used as characteristic parameters
under the condition of rod waveguide is used. Besides, frequency is a better parameter
than energy and amplitude when the AE signal is higher than the threshold.
43.1 Introduction
As a nondestructive testing (NDT) method, AE detection is widely used to investigate
material damage at elevated temperature. When AE detection is carried out at elevated
X. Zeng · Q. Deng · B. Wang (B) · Z. Deng
School of Aeronautics, Northwestern Polytechnical University, Xi’an 710072, China
e-mail: b.wang@nwpu.edu.cn
X. Wang
Beijing Softland Times Scientific & Technology Co. LTD, Beijing 100083, China
e-mail: AE1616@163.com
C. Zhang
School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an
710072, China
e-mail: cyzhang@nwpu.edu.cn
© The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2021
G. Shen et al. (eds.), Advances in Acoustic Emission Technology, Springer Proceedings
in Physics 259, https://doi.org/10.1007/978-981-15-9837-1_43
487