利用激光侧向激励产生的 Lamb 波反向确定键合结构的界面特性

IF 0.5 4区 材料科学 Q4 MATERIALS SCIENCE, CHARACTERIZATION & TESTING Materials Evaluation Pub Date : 2023-12-01 DOI:10.32548/2023.me-04319
Tianming Ye, Wenxiang Hu, Tao Chen, Yanxia Li
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引用次数: 0

摘要

在航空、汽车和其他行业中,对粘接结构的粘接性能进行无损检测至关重要。本研究提出了一种基于 Lamb 波的定量表征方法,用于确定粘接结构的界面刚度。研究建立了一个理论模型,通过该模型研究了兰姆波在粘接结构中的弥散关系。模拟了从完全粘接到弱粘接的不同界面状态,数值结果显示了兰姆波对界面刚度的敏感性。提出了一种横向激励方法来增强对界面敏感的 Lamb 波模式的激励,激光超声实验表明横向激励方法产生的 Lamb 波信号增强了铝-环氧-铝样品上的 Lamb 波信号。然后,提出了一种快速构建反演目标函数的方法来重建粘接结构的界面刚度系数,并通过有限元模拟验证了其功能。最后,利用反演方案重建了样品的界面特性。
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Inverse Determination Of Interfacial Properties of a Bonded Structure Using Lamb Waves Generated By Laser Lateral Excitation
Nondestructive testing of the adhesive bond properties of a bonded structure is essential in aviation, automotive, and other industries. In this study, a Lamb wave–based quantitative characterization method is proposed to determine the interfacial stiffness of bonded structures. A theoretical model is established, with which the dispersion relationship of Lamb waves in a bonded structure is investigated. Different interfacial states ranging from a perfect bond to a weak bond are simulated, and the numerical results show the sensitivity of Lamb waves to interfacial stiffness. A lateral excitation method is proposed to enhance the excitation of the interfacial sensitive Lamb wave modes, and laser ultrasonic experiments show the enhancement of the Lamb wave signals on aluminum-epoxy-aluminum samples generated by the lateral excitation method. Then, a rapid construction method of inversion objective function is presented to reconstruct the interfacial stiffness coefficient of a bonded structure, and its functionality is validated via finite element simulations. Finally, the interfacial properties of the samples are reconstructed using the inversion scheme.
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来源期刊
Materials Evaluation
Materials Evaluation 工程技术-材料科学:表征与测试
CiteScore
0.90
自引率
16.70%
发文量
35
审稿时长
6-12 weeks
期刊介绍: Materials Evaluation publishes articles, news and features intended to increase the NDT practitioner’s knowledge of the science and technology involved in the field, bringing informative articles to the NDT public while highlighting the ongoing efforts of ASNT to fulfill its mission. M.E. is a peer-reviewed journal, relying on technicians and researchers to help grow and educate its members by providing relevant, cutting-edge and exclusive content containing technical details and discussions. The only periodical of its kind, M.E. is circulated to members and nonmember paid subscribers. The magazine is truly international in scope, with readers in over 90 nations. The journal’s history and archive reaches back to the earliest formative days of the Society.
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