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Delamination Detection Using Guided Wave Phased ArraysThis paper presents a method for detecting multiple delaminations in composite laminates using non-contact phased arrays. The phased arrays are implemented with a non-contact scanning laser Doppler vibrometer (SLDV). The array imaging algorithm is performed in the frequency domain where both the guided wave dispersion effect and direction dependent wave properties are considered. By using the non-contact SLDV array with a frequency domain imaging algorithm, an intensity image of the composite plate can be generated for delamination detection. For the proof of concept, a laboratory test is performed using a non-contact phased array to detect two delaminations (created through quasi-static impact test) at different locations in a composite plate. Using the non-contact phased array and frequency domain imaging, the two impact-induced delaminations are successfully detected. This study shows that the non-contact phased array method is a potentially effective method for rapid delamination inspection in large composite structures.
Document ID
Document Type
Conference Paper
Tian, Zhenhua
(South Carolina Univ. Columbia, SC, United States)
Yu, Lingyu
(South Carolina Univ. Columbia, SC, United States)
Leckey, Cara
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
October 7, 2016
Publication Date
September 19, 2016
Subject Category
Composite Materials
Report/Patent Number
Paper No. 2911
Meeting Information
American Society for Composite (ASC) Technical Conference(Williamsburg, VA)
Funding Number(s)
WBS: WBS 826611.04.07.02
Distribution Limits
Public Use Permitted.
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