Ghent University, Department of Materials Science and Engineering, Technologiepark-Zwijnaarde 903, 9052 Zwijnaarde, Belgium.
Georgia Institute of Technology, George W. Woodruff School of Mechanical Engineering, UMI Georgia Tech CNRS 2958, Georgia Tech Lorraine, Laboratory for Ultrasonic Nondestructive Evaluation, 2 rue Marconi, 57070 Metz, France.
Ultrasonics. 2014 Aug;54(6):1685-91. doi: 10.1016/j.ultras.2014.02.022. Epub 2014 Mar 11.
Scholte-Stoneley wave propagation on a dihedral and more precisely the diffraction effects occurring at the corners, has since long been of high importance for nondestructive testing of materials and structures. Experimental investigations have been reported in the past. Simulations based on radiation mode theory have been published before, explaining the only situation for which the model is applicable namely rectangular corners. The current report describes an investigation applying finite element simulations. Results are obtained not only for rectangular corners but for any possible corner angle. The outcome is in agreement with reported experiments. Moreover a critical corner angle is found below and beyond which different diffraction phenomena occur. The study is performed for different isotropic solids.
在二面角上的 Scholte-Stoneley 波传播，更准确地说是在拐角处发生的衍射效应，长期以来一直是材料和结构无损检测的重要研究内容。过去已经有报道过相关的实验研究。以前也曾发表过基于辐射模态理论的模拟，该理论仅适用于模型适用的唯一情况，即直角拐角。本报告描述了应用有限元模拟的研究。结果不仅适用于矩形拐角，也适用于任何可能的拐角角度。结果与报道的实验结果一致。此外，还发现了一个临界拐角角度，低于和超过该角度会发生不同的衍射现象。该研究针对不同各向同性固体进行。
