THz time-domain imaging was utilized in the non-destructive evaluation of various composite materials used in aerospace structures and components for the characterization of defects and changes in material properties due to mechanical and thermal strain.
Lindsay Owens, Douglas T. Petkie and Jason A. Deibel. "Non-Destructive Evaluation of Aerospace Materials using Terahertz Time-Domain Imaging" Optics InfoBase Conference Papers
(2012) ISSN: 1557529477
Available at: http://works.bepress.com/douglas_petkie/85/