Open Access

ARTICLE

Damage Extension Diagnosis Method for Typical Structures of Composite Aircraft Based on Lamb Waves

Dongyue Gao¹, Yishou Wang¹, Zhanjun Wu¹, Rahim Gorgin¹

1 State Key Laboratory of Structural Analysis for Industry Equipments, School of Aeronautics and Astronautics, Dalian University of Technology, Dalian 116024, Liaoning, China.

Structural Durability & Health Monitoring 2013, 9(3), 233-252. https://doi.org/10.32604/sdhm.2013.009.233

Abstract

In this study, a Lamb wave-based damage extension diagnosis method to monitor the damage on typical structures of composite aircraft is proposed. First, an overview of the damage extension diagnosis method is given. In the method, probability-based damage diagnostic imaging was combined with empirical threshold value to distinguish damage location and estimate damage size in damage extension process. To validate the effectiveness of method, extension diagnosis of simulate delamination damage in typical structure on aircraft were processed. To illustrate the capability of the damage extension diagnostic method, a delamination growth monitoring experiment was performed in a typical reinforce component (Tjoint reinforced plate) of composite aircraft during static load testing. The results show that, using Lamb waves-based damage extension diagnosis method, the damage location and size were evaluated accurately; delamination size growth can be monitored by continuous damage extension diagnosis, the monitoring result correspond with destroy law of composite component and the presented size extension indicator correspond with NDT result.

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Keywords

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