Work

Nondestructive evaluation of aircraft composites using transmissive terahertz time domain spectroscopy

Year: 2008

Type: article

Abstract: Terahertz time domain spectroscopy (TDS) was assessed as a nondestructive evaluation technique for aircraft composites. Damage to glass fiber was studied including voids, delaminations, mechanical damage, and heat damage. Measurement of the material properties on samples with localized heat damage showed that burning did not change the refractive index or absorption coefficient noticeably; however, material blistering was detected. Voids were located by TDS transmissive imaging using amplitude and phase techniques. The depth of delaminations was measured via the timing of Fabry-Perot reflections after the main pulse. Evidence of bending stress damage and simulated hidden cracks was also detected with terahertz imaging.

Source: Optics Express

DOI: 10.1364/oe.16.017039

Authors: Christopher D. Stoik, Matthew J. Bohn, James L. Blackshire

Institutions: U.S. Air Force Institute of Technology, United States Air Force Research Laboratory, U.S. Air Force Research Laboratory Materials and Manufacturing Directorate

Language: English

Topic: Terahertz technology and applications

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,270

OpenAlex ID: W2044646663

FWCI: 9.028

Cites: 27

Cited by: 381

Related to: 10