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首页> 外文会议>Conference on Nondestructive Evaluation and Health Monitoring of Aerospace Materials and Civil Infrastructures, Mar 18-19, 2002, Newport Beach, USA >Guided wave ultrasonics for NDE of aging aircraft components
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Guided wave ultrasonics for NDE of aging aircraft components

机译：导波超声用于老化飞机部件的无损检测

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摘要

Bond inspection is one of the most critical NDE tasks addressing the aging aircraft problem. This paper is aimed at reviewing and furthering the use of ultrasonic guided waves for the inspection of bonded components, particularly lap joints between thin plates such as those found in aircraft skins. The transfer matrix theory of wave propagation in multilayered components is used to predict the sensitivity of the wave dispersion behavior to the bond state. The experimental study includes the use of non-contact air-coupled transducers to excite and detect guided waves in a pitch-catch arrangement. It is shown that by monitoring the ultrasound amplitude leaking through the bondline it is possible to detect disbonds as well as low-strength bonds. A photoelastic study confirms this result. It is reaffirmed that those modes with predominant shear-type deformations at the bondline are the most sensitive to the bond state.
机译：邦定检查是解决飞机老化问题的最关键的NDE任务之一。本文旨在审查和进一步使用超声波导波检查粘合的组件，尤其是薄板之间的搭接，例如飞机蒙皮中的搭接。波在多层组件中传播的传递矩阵理论用于预测波色散行为对键合状态的敏感性。实验研究包括使用非接触式空气耦合换能器来激励和检测音高-捕获装置中的导波。结果表明，通过监测通过粘结线泄漏的超声波振幅，可以检测到剥离以及低强度粘结。光弹性研究证实了这一结果。可以肯定的是，那些在键合线处具有明显剪切型变形的模式对键合状态最敏感。

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