Highly nonlinear solitary waves for the detection of localized corrosion
Highly nonlinear solitary waves for the detection of localized corrosion
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DOI：
10.1088/1361-665x/ab9b5b
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发表时间：
2020-08-01
影响因子：
4.1
通讯作者：
Rizzo, Piervincenzo
中科院分区：
文献类型：
--
作者：
Jalali, Hoda;Rizzo, Piervincenzo
本文研究了高度非线性孤立波作为无损评估方法的应用，以检测金属结构中的局部腐蚀。通过使用单周期粒子链与钢板接触进行局部加速腐蚀进行实验。从时间波形中提取了一些损伤敏感特征，并将其输入多元统计分析中，以提高所提出的非侵入性监测方法的灵敏度。该实验还辅以有限元模型，以量化局部腐蚀对沿链传播的孤立波的某些特征的影响。数值和实验结果都表明，在链板界面反射的孤立波受到腐蚀的存在和进展的影响。此外，多变量统计分析提高了所提出方法的灵敏度。将来，所提出的方法可以在高温或放射性环境不利于基于压电的超声测试的使用的那些应用中实施。
This paper investigates the application of highly nonlinear solitary waves as a nondestructive evaluation method to detect localized corrosion in metallic structures. An experiment was conducted by using chains of monoperiodic particles in contact with a steel plate subjected to localized accelerated corrosion. A few damage-sensitive features were extracted from the time waveforms and fed into a multivariate statistical analysis to enhance the sensitivity of the proposed non-invasive monitoring approach. The experiment was complemented by a finite element model to quantify the effects of localized corrosion on certain features of the solitary waves propagating along the chain. Both the numerical and the experimental results show that the solitary waves reflected at the chain-plate interface are affected by the presence and progression of corrosion. Furthermore, the multivariate statistical analysis improved the sensitivity of the proposed approach. In the future, the proposed method may be implemented in those applications in which high temperature or radioactive environments are detrimental for the use of piezoelectric based ultrasonic testing.