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Characterizing the properties of ultrasonics propagating on the surface of materials with defect by Laser-ultrasonics method |
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| Authors: | XU Xiaodong CHEN Xiang LI Kaiyuan LIU Xiaojun CHENG Jianchun Christ Glorieux |
| Institution: | XU Xiaodong~(1 ) CHEN Xiang~1 LI Kaiyuan~(1,3) LIU Xiaojun~1 CHENG Jianchun~1 Christ Glorieux~2 (1 Key Lab.of Modern Acoustics of Ministry of Education,Nanjing University Nanjing 210093) (2 Laboratorium voor Akoestiek en Thermische Fysica,Departement Natuurkunde,K.U.Leuven,Celestijnenlaan 200D,B-3001 Leuven,Belgium) (3 Institute of Acousics,Chinese Academy of Sciences Beijing 100190) |
| Abstract: | A laser ultrasonics method is used to characterize the propagation properties of surface wave traveling on the surface of materials with sub-surface defect in 2D.Linear and nonlinear propagation properties of ultrasonics caused by the defects have been detected in experiment. A theoretical model is proposed and used to study the linear and nonlinear properties of ultrasonics caused by the defect.The numerical results indicate that the nonlinear ultrasonic wave will be excited when a finite amplitude ultraso... |
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