Modeling and Analysis of Acoustic Emission Generated by Fatigue Cracking

Sensors

Guijie Liu¹  Weilei Mu¹  Yuqing Gao¹  Yuxue Wang¹  Hao Hu² 

[1] Engineering College, Ocean University of China, Qingdao 266100, China;Qingdao Research Institute & School of Marine Science and Technology, Northwestern Polytechnical University, Xi’an 710072, China;

关键词: acoustic emission (AE);    fatigue crack growth;    predictive modeling;   

DOI  :  10.3390/s22031208

来源: DOAJ

【 摘 要 】

The acoustic emission (AE) method is a popular and well-developed method for passive structural health monitoring of metallic and composite structures. The current study focuses on the analysis of one of its processes, sound source or signal propagation. This paper discusses the principle of plate wave signal sensing using piezoelectric transducers, and derives an analytical expression for the response of piezoelectric transducers under the action of stress waves, to obtain an overall mathematical model of the acoustic emission signal from generation to reception. The acoustic emission caused by fatigue crack extension is simulated by a finite element method, and the actual acoustic emission signal is simulated by a pencil lead break experiment. The results predicted by the mathematical model are compared with the experimental results and the simulation results, respectively, and show good agreement. In addition, the presence of obvious S0 mode Lamb waves is observed in the simulation results and experimental results, which further verifies the correctness of the analytical model prediction.

【 授权许可】

Unknown