title: Solder joint failure localization of welded joint based on acoustic emission beamforming.
abstract: A localization approach of welded joint damage is proposed based on acoustic emission (AE) beamforming. In this method, a uniform line array is introduced to detect the AE signal of welded joints in specified area. In order to investigate the influence of fillet and crimping commonly existing in a welded plate structure during the AE wave propagation process, the finite element method (FEM) is applied to simulate the behavior of AE wave in the specimen. The simulation localization results indicate that the proposed localization approach can effectively localize AE sources although there exist the fillet and crimping, and it is also validated by the pencil-lead-broken test on rectangular steel tube with welded joints. Finally, the proposed method is adopted to localize the failure of solder joint in operation vibration condition. The proposed method is successful to localize the compact AE source caused by the cracked joint based on wavelet packet transform.
authors.affiliation: School of Transportation Science and Engineering, Beihang University, Beijing 100191, PR China.
authors.forename: Xiandong
authors.initials: X
authors.lastname: Liu
authors.affiliation: School of Transportation Science and Engineering, Beihang University, Beijing 100191, PR China; Beijing Electro-Mechanical Engineering Institute, Beijing 100074, PR China.
authors.forename: Denghong
authors.initials: D
authors.lastname: Xiao
authors.affiliation: School of Transportation Science and Engineering, Beihang University, Beijing 100191, PR China.
authors.forename: Yingchun
authors.initials: Y
authors.lastname: Shan
authors.affiliation: School of Transportation Science and Engineering, Beihang University, Beijing 100191, PR China.
authors.forename: Qiang
authors.initials: Q
authors.lastname: Pan
authors.affiliation: School of Transportation Science and Engineering, Beihang University, Beijing 100191, PR China. Electronic address: hetian@buaa.edu.cn.
authors.forename: Tian
authors.initials: T
authors.lastname: He
authors.affiliation: Beijing Electro-Mechanical Engineering Institute, Beijing 100074, PR China.
authors.forename: Yong
authors.initials: Y
authors.lastname: Gao
keywords: Acoustic emission; Beamforming; Localization; Wavelet packet transform; Welded joint