Characterizing the Properties of Ultrasonics Propagating on the Surface of Materials with Defect by Laser-Ultrasonics Method
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 area. 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 ultrasonics propagates on the surface of materials with sub-surface defect. The theoretical analysis confirms that the nonlinear wave is caused by the clapping of the interface of defect instead of the mode conversions of ultrasonics propagating on the surface of sample with sub-surface defect.
Xiao-Dong Xu Xiang Chen Kai-Yuan Li Xiao-Jun Liu Jian-Chun Cheng Christ Glorieux
Institute of acoustics, Key Laboratory of Modern Acoustics of Ministry of Education, Nanjing Univers Laboratorium voor Akoestiek en Thermische Fysica, Departement Natuurkunde, K. U. Leuven,Celestijnenl
国际会议
2nd China-Korea Ioint Workshop on Ultrasonic Nondestructive Evaluation(第二届中韩双边超声无损评估学术会议)
上海
英文
72-78
2009-10-20（万方平台首次上网日期，不代表论文的发表时间）