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Proceedings Paper

Noncontact laser-based computation method of NDE of composites and other structures
Author(s): Thangavel M. Thevar; John M. Webster; Mikhail Kalshteyn; Jacqueline M. Mew
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Paper Abstract

A new laser based remote NDE method named RAID is described and some selected results are presented in this paper. This system has demonstrated its ability to detect defects in solid laminates; honeycomb/carbon, where defects at the rear have been observed; bonding defects in ceramic and also defects such as cracking in the new carbon foam materials, both of these latter materials have extremely high acoustic attenuation. Additionally the system has recently demonstrated its feasibility to detect and quantify subsurface corrosion in aluminum riveted and boded structures such as lap joints; to date 5 percent metal loss has been detected. Defects in other metal structures such as tear straps in airframe fuselages of transport aircraft are rapidly detectable.

Paper Details

Date Published: 8 February 1999
PDF: 7 pages
Proc. SPIE 3585, Nondestructive Evaluation of Aging Materials and Composites III, (8 February 1999); doi: 10.1117/12.339851
Show Author Affiliations
Thangavel M. Thevar, Holographics Inc. (United States)
John M. Webster, Holographics Inc. (United States)
Mikhail Kalshteyn, Holographics Inc. (United States)
Jacqueline M. Mew, Univ. of Portsmouth (United Kingdom)

Published in SPIE Proceedings Vol. 3585:
Nondestructive Evaluation of Aging Materials and Composites III
George Y. Baaklini; Carol A. Nove; Eric S. Boltz, Editor(s)

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