Laser phased array generated ultrasound for nondestructive evaluation of ceramic materials
學年 85
學期 2
出版（發表）日期 1997-03-01
作品名稱 Laser phased array generated ultrasound for nondestructive evaluation of ceramic materials
作品名稱（其他語言）
著者 楊智旭; Yang, Jr-Syu; Sanderson, T.; Ume, C.; Jarzynski, J.
單位 淡江大學機械與機電工程學系
出版者 Springer
著錄名稱、卷期、頁數 Journal of nondestructive evaluation 16(1), pp.1-9
摘要 This paper describes the experimental application of a phased optical fiber array to transmit pulsed laser light to the free surface of Carborundum CS-3 ceramic samples for ultrasonic nondestructive evaluation (NDE). The pulsed laser beams heat the surface of the ceramic rapidly, and can thermoelastically generate longitudinal, shear, and surface (Rayleigh) waves. Without the optical fiber array all three wave modes are generated simultaneously, and no control over directivity or beam-width is possible. The experimental results presented here indicate that the wave modes, beam-width, and directivity of the generated ultrasound can be controlled by using the phased optical fiber array. Experimental directivity patterns for the laser phased array are compared to a simple theoretical model based on Rose’s point source theory. The model predicts shear wave directivities better than either longitudinal or surface waves. This work demonstrates some of the capabilities and limitations of using laser-phased arrays on ceramics.
關鍵字 Laser ultrasonics;phased optical fiber array;beamsteering;directivity patterns
語言 en_US
ISSN 0195-9298
期刊性質 國外
收錄於
產學合作
通訊作者
審稿制度 否
國別 USA
公開徵稿
出版型式 ,紙本
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