Ultrasonic Backward Radiation Profile on Painted Rough Interface
Generalized Lamb surface waves are generated in a surface region when ultrasonic waves are incident upon the layered substrates such as painted specimen in liquid. Then, backward radiated waves are returned to the direction of incidence by scattering and energy radiation of the surface waves. Hence, the backward radiation could be used in assessing the interfacial state between layer and substrate because the surface wave is sensitive to the change of physical properties in a surface region. Painting surface treatment of commercial products and articles occasionally hide the surface region trouble such as roughness and crack. The evaluation of interfacial state under painting layer is very important in the prevention of great accidence, hence the evaluation technique should be nondestructive, fast and easy applicable to the fields. The backward radiations were measured for the painted glass with periodic interfacial roughness immersed in water tank. The effect of interfacial roughness on the angular pattern and frequency spectrum of the ultrasonic backward radiation was investigated to develop the nondestructive technique for interfacial roughness evaluation.
Sung D. Kwon
Dept. of Physics, Andong National University,P.O.Box 203, Andong, 760-749, Korea
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
64-71
2009-10-20（万方平台首次上网日期，不代表论文的发表时间）