Theory and Experiment Study of Ultrasound Generation by Sinusoid Pulse Laser at the Thermoelastic Solid Surface
Applying one-dimension heat exchange equation and Navier-Stokes equation, the theory model of thermoelastic ultrasound that is generated by laser pulse is established by using simplification sinusoid pulse model, the ultrasound stress pulse is studied. Expressions of stress pulse are attained, which the sample is feebleness absorbability and its surface is freedom or tightening. Imitation and experiment results show stress pulse of tightening surface is monopolar and freedom surface is ambipolar, the breadth of stress pulse is much bigger than the laser pulse. Increasing thickness of sample, extremum of stress pulse decreases. Also it is much more closed to true skew-Gaussian laser pulse, it has much more universality.
ultrasonics laser ultrasound thermoelastic effect Gauss laser pulse thermal diffusion1
Shan Ning Shi Yi Kai Zhao Jiang Hai Yao Qin Yuan Xiao Qing
College of Mechanical and Electrical Engineering, Northwestern Polytechnical University, Xian 710072
国际会议
北京
英文
2007-08-05（万方平台首次上网日期，不代表论文的发表时间）