Method to monitor structural damage occurrence and...

Details Method to monitor structural damage occurrence and... Method to monitor structural damage occurrence and...

2007-10-16

2007-10-16

Wong, Tina M. (Department: 2874)

Optical waveguides

Optical waveguide sensor

Including physical deformation or movement of waveguide

C385S037000

Reexamination Certificate

active

11296855

ABSTRACT:
A method of monitoring structural damage in a composite structure manufactured by co-curing, co-bonding or secondary bonding of several sub-components (7, 8), using fibre optic Bragg grating sensors attached or embedded to or between (in the bonding line) said sub-components, comprising a first step of measuring the wavelength spectra (31, 33, 40) of said Bragg grating sensors at the end of the manufacturing of the part, and in a known load condition, considered as reference and a second step of identifying the occurrence of a failure of the structure and the progress of said failure detecting the release of the residual stresses/strains stored during the curing process by measuring changes (31to32, 33to34, 40to41) with respect to said reference wavelength spectra.

REFERENCES:
patent: 7017421 (2006-03-01), Kehlenbach

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