Transactions of Nanjing University of Aeronautics & Astronautics
Delamination Damage Detection in Laminated Composite by LDR-Based Multi-frequency Method
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Abstract:
Local defected resonance （LDR） is a recently-developed non-destructive testing method， which identifies damage by detecting the vibrational response of the structural surface under the wideband ultrasonic excitation. The concept of LDR is studied and applied for damage imaging of delamination in composite laminates. Aiming at the problem of poor anti-noise ability and inaccurate damage identification in traditional detection process， an LDR-based multi-frequency method is proposed. Experimental results show that the proposed method can realize the localization and imaging of delamination damage in composite materials.
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This work was supported by the National Natural Science Foundation of China （Nos. 51875227， 51805261， 51775267）， the Natural Science Foundation of Jiangsu Province （Nos. BK20181286， BK20180430）， and the Aviation Science Fund （No. 20161552014）. The authors realize that the time and space available for a review of such an ambitious subject are limited， thus， regretfully， we are unable to cover many important contributions. The authors would like to acknowledge Dr. TAO Congcong and Dr. XU Xiaojuan for their assistance， all with the State Key Laboratory of Mechanics and Control of Mechanical Structure， College of Aerospace Engineering，Nanjing University of Aeronautics and Astronautics.
Clc Number:
TP274
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