用导波和电位正向路径确定缺陷尺寸的截止频率技术的局限性

IF 0.5 4区 材料科学 Q4 MATERIALS SCIENCE, CHARACTERIZATION & TESTING
Dileep Koodalil, Borja Lopez, Syed Ali, Alvaro Pallares
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引用次数: 0

摘要

多年来,导波一直用于寻找无法直接进入感兴趣区域的缺陷。随着无损检测方法的普及,资产所有者提高了他们的期望,并经常要求检查员量化检测到的任何损坏的严重程度。该领域的最新发展引起了对截止频率确定技术的新兴趣。在这种技术中,不同波长的导波通过腐蚀区域,较薄的部分充当低通滤波器,当波通过它时“切断”某些频率。通过测量穿过受损区域或被受损区域反射的波的频率含量,可以估计剩余的墙壁。在这项工作中,我们对这种技术的局限性进行了分析,这可能导致根据缺陷的形状对剩余壁的严重高估。最后,作者提出了一种潜在的发展途径,即利用传统的振幅和频率测量来估计缺陷的形状和深度,这些测量可以单独使用,也可以与截止频率信息结合使用,以提高实际应用的有效性和尺寸精度。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Limitations of the Cutoff Frequency technique for Sizing Defects with Guided Waves and a Potential Path Forward
Guided waves have been used for many years to find defects where there is no direct access to the area of interest. As the nondestructive testing method has grown in popularity, asset owners have increased their expectations and frequently request inspectors to quantify the severity of any damage detected. Recent developments in this field have prompted a renewed interest in the cutoff frequency sizing technique. In this technique, guided waves with different wavelengths are passed through a corroded area, and the thinner section acts as a low-pass filter that “cuts off” certain frequencies as the waves travel through it. By measuring the frequency content of the waves that pass through or are reflected by the damaged area, the remaining wall can be estimated. In this work, we provide an analysis of the limitations of this technique, which can lead to significant overestimation of the remaining wall depending on the shape of the defects. In the end, the authors propose a potential path forward in which conventional amplitude and frequency measurements are used to estimate the shape and depth of the defects, which can be used by themselves or in combination with cutoff frequency information to increase the validity and sizing accuracy for practical use.
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来源期刊
Materials Evaluation
Materials Evaluation 工程技术-材料科学:表征与测试
CiteScore
0.90
自引率
16.70%
发文量
35
审稿时长
6-12 weeks
期刊介绍: Materials Evaluation publishes articles, news and features intended to increase the NDT practitioner’s knowledge of the science and technology involved in the field, bringing informative articles to the NDT public while highlighting the ongoing efforts of ASNT to fulfill its mission. M.E. is a peer-reviewed journal, relying on technicians and researchers to help grow and educate its members by providing relevant, cutting-edge and exclusive content containing technical details and discussions. The only periodical of its kind, M.E. is circulated to members and nonmember paid subscribers. The magazine is truly international in scope, with readers in over 90 nations. The journal’s history and archive reaches back to the earliest formative days of the Society.
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