Acoustic emission modeling for crack extension detection using extended finite element method

被引：0
|
作者：
He, Kuanfang [1 ,2 ]
Lu, Qinghua [1 ]
Peng, Yanfeng [2 ]
机构：
[1] Foshan Univ, Sch Mechatron Engn, Foshan, Peoples R China
[2] Hunan Univ Sci & Technol, Hunan Prov Key Lab Hlth Maintenance Mech Equipmen, Xiangtan, Peoples R China
来源：
2019 PROGNOSTICS AND SYSTEM HEALTH MANAGEMENT CONFERENCE (PHM-QINGDAO) | 2019年
基金：
中国国家自然科学基金;
关键词：
component; Acoustic emission modeling; XFEM; Crack extension; Time-frequency characters; Detection; WAVE-PROPAGATION; GUIDED-WAVES;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The extended finite element method (XFEM) is implemented to model and solve acoustic emission (AE) response of an elastic plate with a crack extension. The numerical cases of AE signals propagation by different crack lengths are investigated, of which time-frequency characters of AE signals by wavelet transform are consistent with theoretical results. The ratio of time-frequency energy as a characteristic parameter is also studied for crack length identification. The ratio of time-frequency energy is proved to be a sensitive numerical parameter for quantitative prediction of crack length.
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页数：6
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