Ono Kanji, Su Hang
Department of Materials Science and Engineering, University of California, Los Angeles, CA 90095, USA.
Department of Civil and Environmental Engineering, University of California, Los Angeles, CA 90095, USA.
Sensors (Basel). 2023 Aug 7;23(15):7004. doi: 10.3390/s23157004.
Ultrasonic non-destructive evaluation, which has been used widely, can detect and size critical flaws in structures. Advances in sound field calculations can further improve its effectiveness. Two calculation methods were used to characterize the relevant sound fields of an ultrasonic transducer and the results were applied to construct and evaluate Distance-Gain-Size (DGS) diagrams, which are useful in flaw sizing. Two published DGS diagrams were found to be deficient because the backward diffraction path was overly simplified and the third one included an arbitrary procedure. Newly constructed DGS diagrams exhibited transducer size dependence, revealing another deficiency in the existing DGS diagrams. However, the extent of the present calculations must be expanded to provide a catalog of DGS diagrams to cover a wide range of practical needs. Details of the new construction method are presented, incorporating two-way diffraction procedures.
已被广泛应用的超声无损检测能够检测结构中的关键缺陷并确定其尺寸。声场计算方面的进展能够进一步提高其有效性。采用了两种计算方法来表征超声换能器的相关声场，并将结果应用于构建和评估距离-增益-尺寸（DGS）图，该图在缺陷尺寸确定中很有用。发现已发表的两张DGS图存在缺陷，因为反向衍射路径被过度简化，而第三张图包含一个任意程序。新构建的DGS图显示出对换能器尺寸的依赖性，揭示了现有DGS图的另一个缺陷。然而，必须扩大当前计算的范围，以提供一系列DGS图来满足广泛的实际需求。本文介绍了新构建方法的细节，其中纳入了双向衍射程序。
