title: An Electromagnetic Sensor with a Metamaterial Lens for Nondestructive Evaluation of Composite Materials.
abstract: This paper proposes the study and implementation of a sensor with a metamaterial (MM) lens in electromagnetic nondestructive evaluation (eNDE). Thus, the use of a new type of MM, named Conical Swiss Rolls (CSR) has been proposed. These structures can serve as electromagnetic flux concentrators in the radiofrequency range. As a direct application, plates of composite materials with carbon fibers woven as reinforcement and polyphenylene sulphide as matrix with delaminations due to low energy impacts were examined. The evaluation method is based on the appearance of evanescent modes in the space between carbon fibers when the sample is excited with a transversal magnetic along z axis (TMz) polarized electromagnetic field. The MM lens allows the transmission and intensification of evanescent waves. The characteristics of carbon fibers woven structure became visible and delaminations are clearly emphasized. The flaws can be localized with spatial resolution better than λ/2000.
authors.affiliation: Nondestructive Testing Department, National Institute of R&D for Technical Physics, 47 D. Mangeron Blvd, 700050 Iasi, Romania. asavin@phys-iasi.ro.
authors.forename: Adriana
authors.initials: A
authors.lastname: Savin
authors.affiliation: Nondestructive Testing Department, National Institute of R&D for Technical Physics, 47 D. Mangeron Blvd, 700050 Iasi, Romania. steigmann@phys-iasi.ro.|Faculty of Physics, Alexandru Ioan Cuza University, 11 Carol I Blvd, 700506 Iasi, Romania. steigmann@phys-iasi.ro.
authors.forename: Rozina
authors.initials: R
authors.lastname: Steigmann
authors.affiliation: CRISMAT Laboratory, National Graduate School of Engineering, University of Caen on Normandy, 6 Marechal Juin Blvd, Caen 14050, France. alina.bruma@utsa.edu.|Department of Physics and Astronomy, University of Texas at San Antonio, One UTSA Circle, San Antonio, TX 78249, USA. alina.bruma@utsa.edu.
authors.forename: Alina
authors.initials: A
authors.lastname: Bruma
authors.affiliation: Faculty of Mechanical Engineering, University of Ljubljana, Aškerčeva 6, 1000 Ljubljana, Slovenia. roman.sturm@fs.uni-lj.si.
authors.forename: Roman
authors.initials: R
authors.lastname: Šturm
keywords: FRPC; damages; electromagnetic sensor; metamaterials lens; nondestructive evaluation