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Evaluation of Disbonds by Diagnostic System Using Lamb Wave Sensor Network

YUKI TOKITA, YOSHIHARU KUZE, MITSUYOSHI UEMATSU, KANATA FUJII, KOSUKE WATANABE

Abstract


Composite materials are used commonly for aircraft manufacturing, and the composite bonded structure is needed to improve flight performance in the future. In terms of maintenance for bonded structures, it is important to detect “disbonds” accurately, and Structural Health Monitoring (SHM) system with lamb wave is one of the most promising methods for the damage detection in the composite structures [1], [2]. In this research, the detection capability of fatigue disbonds in the composite bonded structure was evaluated by the lamb-wave-based SHM system, SMART Layer® (Acellent Technologies, Inc.). In particular, the fatigue tests were conducted to grow the artificial disbonds on the boundary surface between the CFRP skin and T-shaped stringer structures. In order to evaluate the correlations between the disbonds growth and the changes of lamb wave signals, lamb wave signals were transmitted and received using a number of patterns of sensor networks.


DOI
10.12783/shm2019/32200

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