Experimental Research on the Reflection Characteristics of Guided Waves from Defects in Steel Wires
The aim of this work is to develop a technique for inspecting parallel wire cables by a quantitative study of the interaction of guided waves with artificial defects in steel wires. The reflection of the L(0,l) mode from notches of varying axial extents and cross-sections in 7-mm diameter wires has been studied by laboratory experiments. Results show that the reflection coefficient of this mode around 50 kHz is a strong function of the defect axial extent, two maximum reflection coefficients occurring respectively at a defect length of about 25 percent of the wavelength and 75 percent, while a local minimum occurring at 50 percent. And the reflection coefficient is approximately linear with defect cross-section when the defect axial length is given. Results imply that the maximum and minimum reflection coefficients at many different frequencies can be utilized for sizing of the axial extent of the defect If the defect axial extent is found, the reflection coefficient at any frequency can be used to estimate the cross-sectional area of the defect. These findings will provide a certain foundation for the detection of parallel wire cables if the reflection characteristics of guided waves in the wire bundles are similar to those in an individual wire.
Guided waves Reflection coefficient Steel wires Notch defects sizing
Hongfen Xiong Xinjun Wu Jiang Xu Huan Tang
Huazhong University of Science and Technology, Wuhan,Hubei, 430074, China
国际会议
2010 International Conference on Digital Manufacturing and Automation(2010 数字制造与自动化国际会议 ICDMA 2010)
长沙
英文
693-696
2010-12-18（万方平台首次上网日期，不代表论文的发表时间）