圆管内疲劳裂纹诱导二次谐波非轴对称导波能量集中度周期变化规律

IF 4.1 2区材料科学 Q1 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Ndt & E International Pub Date : 2024-12-20 DOI:10.1016/j.ndteint.2024.103314

Zhou Fang, Conglin Lin, Yanwei Huang

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引用次数: 0

摘要

利用线性非轴对称导波的周期性能量分布变化，可以确定圆管内大裂纹的位置。然而，即使对于非线性导波，确定圆管内微裂纹的位置仍然是一项困难的工作。与线性导波可以通过大裂纹的反射探测轴向位置不同，疲劳裂纹甚至不会产生明显的反射。研究了圆管内疲劳裂纹诱导的二次谐波非轴对称导波能量集中度的周期变化规律。能量集中程度与其轴向传播距离之间的定量关系有可能用于检测疲劳裂纹并表征其轴向和周向位置。为了便于研究，优化了一种特定的频率提取方法来提取二次谐波非轴对称导波。此外，设计了能量集中度系数来表征能量分布。为验证所研究的能量集中度周期性变化规律，进行了基础、数值和实验工作。

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Energy concentration degree periodical variation rule of fatigue crack-induced second harmonic non-axisymmetric guided wave within circular tubes

The position of a macrocrack within a circular tube can be determined through the periodic energy distribution variation of a linear non-axisymmetric guided wave. However, to determine the positions of a microcrack within a circular tube is still a difficult job, even for the nonlinear guided wave. Unlike the linear guided wave can detect the axial position through the reflection from a macrocrack, a fatigue crack does not even cause remarkable reflection. This paper investigates the energy concentration degree periodical variation rule of fatigue crack-induced second harmonic non-axisymmetric guided wave within a circular tube. The quantitative relationship between the energy concentration degree and its propagated axial distance is potential to be used to detect a fatigue crack and characterize its axial, circumferential positions. To facilitate the investigation, a specific frequency extracting method was optimized to extract the second harmonic non-axisymmetric guided wave. In addition, an energy concentration degree coefficient was designed to characterize the energy distribution. The fundamental, numerical and experimental work were implemented to verify the studied energy concentration degree periodical variation rule.

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来源期刊

Ndt & E International 工程技术-材料科学：表征与测试

CiteScore

7.20

自引率

9.50%

发文量

121

审稿时长

55 days

期刊介绍： NDT&E international publishes peer-reviewed results of original research and development in all categories of the fields of nondestructive testing and evaluation including ultrasonics, electromagnetics, radiography, optical and thermal methods. In addition to traditional NDE topics, the emerging technology area of inspection of civil structures and materials is also emphasized. The journal publishes original papers on research and development of new inspection techniques and methods, as well as on novel and innovative applications of established methods. Papers on NDE sensors and their applications both for inspection and process control, as well as papers describing novel NDE systems for structural health monitoring and their performance in industrial settings are also considered. Other regular features include international news, new equipment and a calendar of forthcoming worldwide meetings. This journal is listed in Current Contents.