会议论文详细信息
3rd International Symposium on Laser Ultrasonics and Advanced Sensing
Numerical Analysis of Narrow Band Ultrasonic Wave Generation with High Repetition Pulse Laser and Laser Scanning
Hayashi, T.^1 ; Yamaguchi, K.^1 ; Biwa, S.^1
Graduate School of Engineering, Kyoto University, 615-8540 Kyoto, Japan^1
关键词: Calculation results;    Elastodynamic finite integration techniques;    Higher harmonics;    Large displacements;    Laser repetition rate;    Narrow-band ultrasonic;    Thermoelastic effects;    Ultrasonic energy;   
Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/520/1/012024/pdf
DOI  :  10.1088/1742-6596/520/1/012024
来源: IOP
PDF
【 摘 要 】

Although the easiest way to enhance ultrasonic energy generated with pulse laser is to increase laser output, excessive laser output causes damage of the surface. This study introduced an alternative way to generate burst signals without any damages at the surface using a newly developed high repetition pulse laser controlled by galvano mirrors. The calculation results using two-dimensional elastodynamic finite integration technique coupled with thermoelastic effect proved that burst wave of 1 MHz and its higher harmonics were generated while supressing excessive temperature rise using this technique. Moreover, significantly large displacements at the frequency range sufficiently lower than laser repetition rate were observed of the same order of displacements generated with one single shot with the same input energy.

【 预 览 】
附件列表
Files Size Format View
Numerical Analysis of Narrow Band Ultrasonic Wave Generation with High Repetition Pulse Laser and Laser Scanning 1081KB PDF download
  文献评价指标  
  下载次数:5次 浏览次数:18次