The propagation of a longitudinal ultrasonic wave normally incident upon an adhesively bonded structure is studied. The structure consists of adherend and adhesive layers with finite thickness. Interfaces between adherend and adhesive are regarded as distributed springs. Theoretical and experimental results show that resonant frequencies of the bonded structure vary sensitively with the interface stiffness constants and adhesive thickness, and these interface characteristics are inversed by the simulation annealing (SA) method. Furthermore, the distribution image of interface stiffnesses is compared with the state of fracture interface, and quantitative prediction of shear strength is achieved based on the distribution of interface stiffnesses and adhesive thicknesses by using a back-propagation neutral network. The average relative error of the shear strength from prediction to real value is 10.7%.
The propagation of a longitudinal ultrasonic wave normally incident upon an adhesively bonded structure is studied. The structure consists of adherend and adhesive layers with finite thickness. Interfaces between adherend and adhesive are regarded as distributed springs. Theoretical and experimental results show that resonant frequencies of the bonded structure vary sensitively with the interface stiffness constants and adhesive thickness, and these interface characteristics are inversed by the simulation annealing (SA) method. Furthermore, the distribution image of interface stiffnesses is compared with the state of fracture interface, and quantitative prediction of shear strength is achieved based on the distribution of interface stiffnesses and adhesive thicknesses by using a back-propagation neutral network. The average relative error of the shear strength from prediction to real value is 10.7%.
(Ultrasonic velocity, dispersion, scattering, diffraction, and Attenuation in solids; elastic constants)
引用本文:
LI Yong-An;MAO Jie;WANG Xiao-Min;LI Ming-Xuan;AN Zhi-Wu;ZHUANG Qiao. Bonding Interface Imaging and Shear Strength Prediction by Ultrasound[J]. 中国物理快报, 2010, 27(6): 64303-064303.
LI Yong-An, MAO Jie, WANG Xiao-Min, LI Ming-Xuan, AN Zhi-Wu, ZHUANG Qiao. Bonding Interface Imaging and Shear Strength Prediction by Ultrasound. Chin. Phys. Lett., 2010, 27(6): 64303-064303.
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