Application of Reciprocity for Facilitation of Wave Field Visualization and Defect Detection

IF 1 4区材料科学 Q3 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Research in Nondestructive Evaluation Pub Date : 2023-10-04 DOI:10.1080/09349847.2023.2261878

Bernd Köhler, Kanta Takahashi, Kazuyuki Nakahata

{"title":"Application of Reciprocity for Facilitation of Wave Field Visualization and Defect Detection","authors":"Bernd Köhler, Kanta Takahashi, Kazuyuki Nakahata","doi":"10.1080/09349847.2023.2261878","DOIUrl":null,"url":null,"abstract":"ABSTRACTThe motion visualization in a structural component was studied for defect detection. Elastic motions were excited by hammer impacts at multiple points and received by an accelerometer at a fixed point. Reciprocity in elastodynamics is only valid under certain conditions. Its validity under given experimental conditions was derived from the elastodynamic reciprocity theorem. Based on this, the dynamic motion of the structural component was obtained for fixed-point excitation from measurements performed using multipoint excitations. In the visualized eigenmodes, significant additional deformation was observed at the wall thinning inserted as an artificial defect. To prevent the dependence of defect detection on its position within the mode shape, another approach was proposed based on the extraction of guided wave modes immediately after impact excitation. It is shown that this maximum intensity projection method works well in detecting defects.KEYWORDS: Elastodynamic reciprocityvisualization of damagemultisite excitationselective guided wave mode AcknowledgmentsWe gratefully acknowledge the funding support by JSPS.Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThe work was supported by the Japan Society for the Promotion of Science [15K01226] and the Invitational Fellowships for Research in Japan [S20084].","PeriodicalId":54493,"journal":{"name":"Research in Nondestructive Evaluation","volume":"25 1","pages":"0"},"PeriodicalIF":1.0000,"publicationDate":"2023-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Research in Nondestructive Evaluation","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1080/09349847.2023.2261878","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"MATERIALS SCIENCE, CHARACTERIZATION & TESTING","Score":null,"Total":0}

引用次数: 0

Abstract

ABSTRACTThe motion visualization in a structural component was studied for defect detection. Elastic motions were excited by hammer impacts at multiple points and received by an accelerometer at a fixed point. Reciprocity in elastodynamics is only valid under certain conditions. Its validity under given experimental conditions was derived from the elastodynamic reciprocity theorem. Based on this, the dynamic motion of the structural component was obtained for fixed-point excitation from measurements performed using multipoint excitations. In the visualized eigenmodes, significant additional deformation was observed at the wall thinning inserted as an artificial defect. To prevent the dependence of defect detection on its position within the mode shape, another approach was proposed based on the extraction of guided wave modes immediately after impact excitation. It is shown that this maximum intensity projection method works well in detecting defects.KEYWORDS: Elastodynamic reciprocityvisualization of damagemultisite excitationselective guided wave mode AcknowledgmentsWe gratefully acknowledge the funding support by JSPS.Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThe work was supported by the Japan Society for the Promotion of Science [15K01226] and the Invitational Fellowships for Research in Japan [S20084].

查看原文本刊更多论文

互易性在波场可视化和缺陷检测中的应用

摘要研究了用于缺陷检测的结构部件运动可视化。弹性运动由锤击在多点激发，并在一个固定点由加速度计接收。弹性动力学中的互易性只在一定条件下有效。从弹性动力学互易定理出发，推导了该方法在一定实验条件下的有效性。在此基础上，通过多点激励的测量，得到了定点激励下结构构件的动态运动。在可视化的特征模态中，在作为人工缺陷插入的壁薄处观察到显著的附加变形。为了避免缺陷检测依赖于缺陷在模态振型内的位置，提出了一种基于在冲击激励后立即提取导波模态的方法。结果表明，这种最大强度投影法可以很好地检测缺陷。关键词:弹性动力往复;损伤可视化;多聚体激励;披露声明作者未报告潜在的利益冲突。本研究得到了日本科学促进会[15K01226]和日本研究邀请奖学金[S20084]的支持。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Research in Nondestructive Evaluation 工程技术-材料科学：表征与测试

CiteScore

2.30

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： Research in Nondestructive Evaluation® is the archival research journal of the American Society for Nondestructive Testing, Inc. RNDE® contains the results of original research in all areas of nondestructive evaluation (NDE). The journal covers experimental and theoretical investigations dealing with the scientific and engineering bases of NDE, its measurement and methodology, and a wide range of applications to materials and structures that relate to the entire life cycle, from manufacture to use and retirement. Illustrative topics include advances in the underlying science of acoustic, thermal, electrical, magnetic, optical and ionizing radiation techniques and their applications to NDE problems. These problems include the nondestructive characterization of a wide variety of material properties and their degradation in service, nonintrusive sensors for monitoring manufacturing and materials processes, new techniques and combinations of techniques for detecting and characterizing hidden discontinuities and distributed damage in materials, standardization concepts and quantitative approaches for advanced NDE techniques, and long-term continuous monitoring of structures and assemblies. Of particular interest is research which elucidates how to evaluate the effects of imperfect material condition, as quantified by nondestructive measurement, on the functional performance.