Characterization of the electromagnetic parameter uncertainty in single-ply unidirectional carbon-fiber-reinforced-polymer laminas. (1st April 2019)

• Record Type: Journal Article
• Authors: Riley, Elliot J.; Koudela, Kevin L.; Narayanan, Ram M.
• Is Part Of: Composites. Number 162(2019)
• Page Start: 361
• Page End: 368
• Publication Date: 2019-04-01
• Subjects: Carbon-carbon composites (CCCs) -- Electrical properties -- Non-destructive testing -- Free-space materials characterization; Composite materials -- Periodicals; Materials science -- Periodicals; Composite materials; Periodicals; Electronic journals; 620.118
• DOI: 10.1016/j.compositesb.2018.10.089
• Languages: English
• ISSNs: 1359-8368

Abstract

Abstract: This paper characterizes the variation in electromagnetic properties of single-ply unidirectional carbon-fiber-reinforced-polymer (CFRP) laminas between samples fabricated using the same material. The variation is referred to as the electromagnetic-parameter uncertainty (EPU). The resulting EPU from both wet-layup and pre-preg fabrication techniques were investigated. A free-space materials characterization system operating from 4 to 18 GHz was used to characterize the electromagnetic properties with respect to the main fiber direction. A surface-impedance representation was calculated from the measured data to expose the EPU. Finally, the effects of the EPU on the reflectivity properties of electromagnetic-absorber designs using unidirectional CFRP were determined.