Numerical investigation of the interaction of highly nonlinear solitary waves with corroded steel plates
Numerical investigation of the interaction of highly nonlinear solitary waves with corroded steel plates
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高度非线性孤立波与腐蚀钢板相互作用的数值研究
DOI：
10.1016/j.ijmecsci.2021.106676
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发表时间：
2021
影响因子：
7.3
通讯作者：
Rizzo, Piervincenzo
中科院分区：
文献类型：
--
作者：
Jalali, Hoda;Rizzo, Piervincenzo
在过去的十年中，一种新的无损评价（NDE）方法的基础上的应用程序的高度非线性孤立波已经出现。该方法是基于孤立波传播的驱动和检测沿着均匀的球形颗粒，其中最后一个是在与材料接触，以评估非侵入性的介质。假设波与待检查的材料/结构之间的动态相互作用取决于材料/结构的条件。本文提出的研究旨在设计和发展的无损检测框架，在金属局部腐蚀的检测。特别是，本文提出了一个数值研究的高度非线性孤立波与板在原始和腐蚀条件下的相互作用。耦合的离散/有限元模型被用来预测的飞行时间和反射孤立波的相对振幅作为局部腐蚀的进展中的板。该方法的灵敏度是量化的不同参数，如板厚度，链长，颗粒的机械和几何性质。结果发现，这种新型的无损检测技术的灵敏度，即在早期阶段检测腐蚀的能力，是成反比的板厚度和成正比的直径和刚度的颗粒。在未来，这项研究的结果可用于优化设计的孤立波换能器，这是设备，可用于触发，维持和检测孤立波的传播及其与感兴趣的结构的相互作用。
Over the last decade, a novel nondestructive evaluation (NDE) method based on the application of highly nonlinear solitary waves has emerged. The method is based on the actuation and detection of solitary waves propagating along a medium made of uniform spherical particles, the last of which is in contact with the material to be assessed noninvasively. The hypothesis is that the dynamic interaction between the wave and the material/structure to be inspected is dependent upon the condition of the material/structure. The study presented in this paper aims at designing and developing the NDE framework for the detection of localized corrosion in metals. In particular, this paper presents a numerical investigation of the interaction of highly nonlinear solitary waves with plates in pristine and corroded conditions. A coupled discrete/finite element model is used to predict the time of flight and the relative amplitudes of the reflected solitary waves as localized corrosion progresses in the plate. The sensitivity of the method is quantified in terms of different parameters such as plate thickness, chain length, and particles' mechanical and geometric properties. It is found that the sensitivity, i.e. the ability to detect corrosion at earlier stages, of this novel NDE technique is inversely proportional to the plate thickness and is proportional to the diameter and the stiffness of the particles. In the future, the findings of this study can be used to optimize the design of solitary wave transducers, which are devices that can be used to trigger, sustain, and detect the propagation of the solitary waves and their interaction with the structure of interest.
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DOI：
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发表时间：
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期刊：
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