Fatigue crack detection in pipes with multiple mode nonlinear guided waves

被引:69
|
作者
Guan, Ruiqi [1 ]
Lu, Ye [1 ]
Wang, Kai [2 ]
Su, Zhongqing [2 ]
机构
[1] Monash Univ, Dept Civil Engn, Clayton, Vic 3800, Australia
[2] Hong Kong Polytech Univ, Dept Mech Engn, Kowloon, Hong Kong, Peoples R China
来源
STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL | 2019年 / 18卷 / 01期
关键词
Nonlinear guided waves; fatigue crack; structural health monitoring; pipelines; contact acoustic nonlinearity; FINITE-AMPLITUDE WAVES; LAMB WAVES; 2ND-HARMONIC GENERATION; DAMAGE; REFLECTION; SCATTERING; SIMULATION; ELEMENT; NOTCHES;
D O I
10.1177/1475921718791134
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
This study elaborates fundamental differences in fatigue crack detection using nonlinear guided waves between plate and pipe structures and provides an effective approach for analysing nonlinearity in pipe structures. For this purpose, guided wave propagation and interaction with microcrack in a pipe structure, which introduced a contact acoustic nonlinearity, was analysed through a finite element analysis in which the material nonlinearity was also included. To validate the simulation results, experimental testing was performed using piezoelectric transducers to generate guided waves in a specimen with a fatigue crack. Both methods revealed that the second harmonic wave generated by the breathing behaviour of the microcrack in a pipe had multiple wave modes, unlike the plate scenario using nonlinear guided waves. Therefore, a proper index which considered all the generated wave modes due to the microcrack was developed to quantify the nonlinearity, facilitating the identification of microscale damage and further assessment of the severity of the damage in pipe structures.
引用
收藏
页码:180 / 192
页数:13
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