Open AccessIntegration and evaluation of a meander-shaped fibre-optical sensor in GFRP coupons
Author(s) -
Andreas Preisler,
Friedrich WolfMonheim,
Dominik Kaiser,
Ralph Wojtczyk,
Athanasios Dafnis,
KaiUwe Schröder,
Wolfgang David,
Paul A. Zandbergen
Publication year - 2021
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1024/1/012026
Subject(s) - meander (mathematics) , fibre reinforced plastic , structural health monitoring , bending , stiffness , materials science , optical fiber , structural engineering , fiber optic sensor , work (physics) , acoustics , computer science , composite material , mechanical engineering , engineering , fiber , telecommunications , physics , geometry , mathematics
Fibre-reinforced plastics are attracting more and more attention also in non-aviation sectors. The possible formation of internal damage and its difficult detection thus simultaneously increases the need for structural health monitoring. In this case especially fibre-optical sensors possess an enormous potential. In the previous work the use of a meander-shaped sensor layout was proposed, utilizing strain in longitudinal direction for loads monitoring and distinct measuring sections in zero-strain direction for structural health monitoring. In the present work, the proposed meander-shaped sensor layout is integrated inside unidirectional coupons using tailored fibre placement. Further samples without a sensor and samples with a straight sensor-fibre were also manufactured as a reference. The influence of the sensor on the static strength and stiffness is then examined in a test campaign using a three-point bending setup. In addition, the functionality of the meander-shaped sensor layout is validated.