Detection of Flat-Bottom Holes in Conductive Composites using Active Microwave Thermography
Abstract
Active microwave thermography (AMT) is an integrated nondestructive testing (NDT) technique that utilizes a microwave-based thermal excitation and subsequent thermal measurement. AMT has shown potential for applications in the transportation, infrastructure, and aerospace industries. This paper investigates the potential of AMT for detection of defects referred to as flat-bottom holes (FBHs) in composites with high electrical conductivity such as carbon fiber-based composites. Specifically, FBHs of different dimensions machined in a carbon fiber reinforced polymer (CFRP) composite sheet are considered. Simulation and measurement results illustrate the potential for AMT as a NDT tool for inspection of CFRP structures. In addition, a dimensional analysis of detectable defects is provided including a radius-to-depth ratio threshold for successful detection.
Recommended Citation
A. Mirala et al., "Detection of Flat-Bottom Holes in Conductive Composites using Active Microwave Thermography," Journal of Nondestructive Evaluation, Diagnostics and Prognostics of Engineering Systems, vol. 1, no. 4, article no. 041005, American Society of Mechanical Engineers, Nov 2018.
The definitive version is available at https://doi.org/10.1115/1.4040673
Department(s)
Electrical and Computer Engineering
International Standard Serial Number (ISSN)
2572-3898; 2572-3901
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2024 American Society of Mechanical Engineers, All rights reserved.
Publication Date
01 Nov 2018