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Detection of water ingress in composite sandwich structures: a magnetic resonance approach |
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| Authors: | Gabriel LaPlante Andrew E Marble Bryce MacMillan Pearl Lee-Sullivan Bruce G Colpitts Bruce J Balcom |
| Affiliation: | aFaculty of Engineering, Université de Moncton, Moncton, NB, Canada E1A 3E9;bDepartment of Physics, MRI Centre, University of New Brunswick, P.O. Box 4400, Fredericton, NB, Canada E3B 5A3;cDepartment of Electrical and Computer Engineering, University of New Brunswick, P.O. Box 4400, Fredericton, NB, Canada E3B 5A3;dDepartment of Mechanical Engineering, University of Waterloo, 200 University Avenue West, Waterloo, Ont., Canada N2L 3G1 |
| Abstract: | Water ingress inside honeycomb sandwich panels during service has been linked to in-flight failure in some aircraft. There is an ongoing effort to develop nondestructive testing methods to detect the presence of water within the panels. Magnetic resonance (MR) represents an attractive approach in that it is sensitive to moisture. Using a unilateral MR sensor, testing can be applied directly to the surface of the panel. The viability of MR is demonstrated through laboratory imaging of both water within sandwich panels, as well as the adhesive itself. The detection of water using a one-sided handheld MR sensor is presented. It is shown that simple detection, as well as spatial localization of water within sandwich panels is possible. |
| Keywords: | Magnetic resonance imaging Water ingress Composites Honeycomb Sandwich panel |
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