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Proceedings Paper

Demonstration of distributed strain sensing in production scale instrumented structures
Author(s): E. Joseph Friebele; Charles G. Askins; Martin A. Putnam; P. E. Heider; R. G. Blosser; J. Florio; R. P. Donti; J. Garcia
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Paper Abstract

Loading experiments have been carried out on a flat panel and C-channels fabricated by the Continuous Resin Transfer Molding (CRTMTM) process. Arrays of fiber Bragg grating (FBG) strain sensors written during fiber draw were embedded in the structures, and the strains measured by these distributed sensors are compared with the results of surface-mounted resistance strain gages (RSG's) and FBG arrays. Reproducibility of the strains measured by an embedded FBG array was demonstrated during cyclical loading of a C-channel, and survivability and reliability of the array was established when the structure was loaded to failure. Discrepancies between the results reported by the embedded FBG's and surface- mounted RSG's and FBG's are attributed to deflections and/or distortions of the embedded FBG by the structural fibers during CRTMTM processing.

Paper Details

Date Published: 1 May 1996
PDF: 7 pages
Proc. SPIE 2721, Smart Structures and Materials 1996: Industrial and Commercial Applications of Smart Structures Technologies, (1 May 1996); doi: 10.1117/12.239118
Show Author Affiliations
E. Joseph Friebele, Naval Research Lab. (United States)
Charles G. Askins, Naval Research Lab. (United States)
Martin A. Putnam, Naval Research Lab. (United States)
P. E. Heider, Ciba Composites (United States)
R. G. Blosser, Ciba Composites (United States)
J. Florio, Ciba Composites (United States)
R. P. Donti, Ciba Composites (United States)
J. Garcia, Ciba Composites (United States)

Published in SPIE Proceedings Vol. 2721:
Smart Structures and Materials 1996: Industrial and Commercial Applications of Smart Structures Technologies
C. Robert Crowe, Editor(s)

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