Near-Field Microwave Nondestructive Distinction between Surface Height Variations and Defects in Thick Sandwich Composites using Standoff Distance Optimization
For this study two different thick composite specimens were used, one with disbond (due to an embedded mylar sheet) having also generating some level of surface height variation in the specimen and the other subjected to an impact damage. An open-ended rectangular waveguide sensor was used to detect and distinguish between the defects and the surface height they may have produced in the specimens. Microwave images of sample areas were produced for these optimization exercises effectively showing the surface height variations or the presence of mylar sheet, respectively.
E. Ranu and R. Zoughi, "Near-Field Microwave Nondestructive Distinction between Surface Height Variations and Defects in Thick Sandwich Composites using Standoff Distance Optimization," Nondestructive Testing and Evaluation, vol. 13, no. 4, pp. 215-225, Taylor & Francis, Jul 1997.
The definitive version is available at http://dx.doi.org/10.1080/10589759708953031
Electrical and Computer Engineering
Keywords and Phrases
Composite Materials; Imaging Techniques; Microwaves; Rectangular Waveguides; Disbond; Impact Damage; Nondestructive Examination
International Standard Serial Number (ISSN)
Article - Journal
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