Analysis of the AE signal caused by fatigue crack growth

摘要：

The acoustic emission (AE) technique is a well-known nondestructive test which are widely applied in research and industrial. It is mainly used in monitoring the onset of the cracking processes in materials to predict and prevent the crack facture that attract the attention of the researchers to apply condition monitoring techniques into detecting the early stage of cracks. The object of this study is to obtain the features of AE signals caused by crack growth. The envelope analysis with discrete wavelet transform (DWT) is used to find the characteristic of AE signal. To estimate the features, the crack length wras divided into three parts. From the raw signals and transferred signals, the power spectrum which was processed by the envelope analysis with DWT was generated. Through this experiment, the envelope analysis with DWT is a better way to analyze the original AE signals. In this paper, the results of fatigue crack growth can contribute to database of crack detection.

关键词： Acoustic emission (AE) Crack growth Envelope analysis DWT Signal characteristic

作者: Jaegu Kim Dongsik Gu Tulugan Kelimu ByeongKeun Choi

作者单位: Department of Precision Mechanical Engineering, Gyeongsang National University, 445, Inpyeong-dong, Department of Energy and Mechanical Engineering, Gyeongsang National University, 445, Inpyeong-dong,

会议类型: 国际会议

会议名称: The 7th International Conference on Fluid and Thermal Energy Conversion(第七届流动技术与热能转化国际会议 FTEC 2011)

会议地点: 郑州

会议语种:英文

页码: 115-122

在线出版日期: 2011-09-24（万方平台首次上网日期，不代表论文的发表时间）