Method to monitor structural damage occurrence and...

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

G - Physics

01

M

G01M 11/08 (2006.01) B32B 43/00 (2006.01) G01N 19/08 (2006.01)

Patent

CA 2529939

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 (31 to 32, 33 to 34, 40 to 41) with respect to said reference wavelength spectra.

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