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 |
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.
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