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Appl. Sci. 2019, 9(3), 567; https://doi.org/10.3390/app9030567

An Omnidirectional Near-Field Comprehensive Damage Detection Method for Composite Structures

1
School of Mechanical and Electrical Engineering, Jinling Institute of Technology, Nanjing 2211169, China
2
Nanjing Ericsson Panda Communication Co. Ltd., Nanjing 2211169, China
*
Authors to whom correspondence should be addressed.
Received: 2 December 2018 / Revised: 26 January 2019 / Accepted: 2 February 2019 / Published: 8 February 2019
(This article belongs to the Special Issue Damage Inspection of Composite Structures)
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Abstract

As one of the active structural health monitoring methods based on the Lamb wave, the ultrasonic phased-array damage detection method can provide information such as damage location and range more intuitively, which is why this method is a research hotspot in the field of Lamb wave-based damage monitoring. However, the ultrasonic phased-array damage detection method intended for the far field is not applicable to near-field damage monitoring. In addition, the traditional one-dimensional piezoelectric phased-array damage imaging method suffers from a blind area in the near field, and the data collection time of its angle scanning is relatively long. In view of these problems, this paper proposes an omnidirectional damage imaging monitoring method, combining the near-field sampling phased-array damage monitoring algorithm and the two-dimensional phased-array. The proposed method is verified by experiments using complex composite materials, and the results obtained show that the proposed omnidirectional near-field sampling phased-array damage imaging method is suitable for real-time damage detection in complex composite materials. View Full-Text
Keywords: structural health monitoring; ultrasonic phased array; composite structure; complex structures structural health monitoring; ultrasonic phased array; composite structure; complex structures
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Wang, Z.; Xiao, Z.; Li, Y.; Jiang, Y. An Omnidirectional Near-Field Comprehensive Damage Detection Method for Composite Structures. Appl. Sci. 2019, 9, 567.

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