High-Speed Time- and Frequency-Domain Terahertz Tomography of Glass-Fiber-Reinforced Polymer Laminates with Internal Defects

Composite materials are increasingly being utilized in many products, such as aircrafts, wind blades, etc. Accordingly, the need for nondestructive inspection of composite is increasing and technologies that allow studied. Existing ultrasound methods limited their ability to detect defects due high attenuation materials, radiographic examination could pose a danger human health. Terahertz (THz) wave technology an emerging approach useful imaging concealed objects or internal structures transmittance non-conductive straightness, safety Using high-speed THz tomography systems we developed, have obtained tomographic images glass-fiber-reinforced polymer (GFRP) laminates with artificial delamination inclusion. The various thicknesses sizes, lie at different depths. We present GFRP samples demonstrate extent which can be detected systems.