US 11,890,852 B2
Composite structures with damage detection capability
Mark R. Gurvich, Middletown, CT (US); Georgios S. Zafiris, Glastonbury, CT (US); Kevin Thomas Gryk, Marcy, NY (US); Brayton Reed, Rome, NY (US); Joyel M. Schaefer, Earlville, NY (US); and Michael King, Sauquoit, NY (US)
Assigned to Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed by Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed on Mar. 25, 2021, as Appl. No. 17/212,831.
Claims priority of provisional application 63/001,707, filed on Mar. 30, 2020.
Prior Publication US 2021/0299997 A1, Sep. 30, 2021
Int. Cl. B32B 7/023 (2019.01); B32B 33/00 (2006.01); G01N 21/64 (2006.01); G01N 21/88 (2006.01)
CPC B32B 7/023 (2019.01) [B32B 33/00 (2013.01); G01N 21/6447 (2013.01); G01N 21/8806 (2013.01); B32B 2262/101 (2013.01); B32B 2262/106 (2013.01); B32B 2307/422 (2013.01); B32B 2597/00 (2013.01); B32B 2605/18 (2013.01); G01N 2021/8845 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A polymer-matrix fiber-reinforced composite structure, the structure comprising:
a plurality of layers each comprising a polymer-matrix composite, the plurality of layers comprising a first layer;
wherein the first layer comprises a first polymer-matrix and a first fluorescent agent interspersed through the first polymer-matrix, the structure being configured such that damage to one of the layers results in a change in fluorescence observable from the at least first layer at the point of damage.