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Development of Aircraft Spoiler Demonstrators for Cost-Efficient Investigations of SHM Technologies under Quasi-Realistic Loading Conditions

1
Institute of Structural Lightweight Design, Johannes Kepler University Linz, Altenberger Str. 69, 4040 Linz, Austria
2
Christian Doppler Laboratory for Structural Strength Control of Lightweight Constructions, Johannes Kepler University Linz, Altenberger Str. 69, 4040 Linz, Austria
*
Author to whom correspondence should be addressed.
Academic Editor: Shijun Guo
Aerospace 2021, 8(11), 320; https://doi.org/10.3390/aerospace8110320
Received: 13 September 2021 / Revised: 21 October 2021 / Accepted: 25 October 2021 / Published: 28 October 2021
(This article belongs to the Section Aeronautics)
An idealized 1:2 scale demonstrator and a numerical parameter optimization algorithm are proposed to closely reproduce the deformation shape and, thus, spatial strain directions of a real aerodynamically loaded civil aircraft spoiler using only four concentrated loads. Cost-efficient experimental studies on demonstrators of increasing complexity are required to transfer knowledge from coupons to full-scale structures and to build up confidence in novel structural health monitoring (SHM) technologies. Especially for testing novel sensor systems that depend on or are affected by mechanical strains, e.g., strain-based SHM methods, it is essential that the considered lab-scale structures reflect the strain states of the real structure at operational loading conditions. Finite element simulations with detailed models were performed for static strength analysis and for comparison to experimental measurements. The simulated and measured deformations and spatial strain directions of the idealized demonstrator correlated well with the numerical results of the real aircraft spoiler. Thus, using the developed idealized demonstrator, strain-based SHM systems can be tested under conditions that reflect operational aerodynamic pressure loads, while the test effort and costs are significantly reduced. Furthermore, the presented loading optimization algorithm can be easily adapted to mimic other pressure loads in plate-like structures to reproduce specific structural conditions. View Full-Text
Keywords: aircraft spoiler; demonstrator; experimental strain analysis; quasi-realistic loading; SHM; composite sandwich; strain-based aircraft spoiler; demonstrator; experimental strain analysis; quasi-realistic loading; SHM; composite sandwich; strain-based
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MDPI and ACS Style

Winklberger, M.; Kralovec, C.; Schagerl, M. Development of Aircraft Spoiler Demonstrators for Cost-Efficient Investigations of SHM Technologies under Quasi-Realistic Loading Conditions. Aerospace 2021, 8, 320. https://doi.org/10.3390/aerospace8110320

AMA Style

Winklberger M, Kralovec C, Schagerl M. Development of Aircraft Spoiler Demonstrators for Cost-Efficient Investigations of SHM Technologies under Quasi-Realistic Loading Conditions. Aerospace. 2021; 8(11):320. https://doi.org/10.3390/aerospace8110320

Chicago/Turabian Style

Winklberger, Markus, Christoph Kralovec, and Martin Schagerl. 2021. "Development of Aircraft Spoiler Demonstrators for Cost-Efficient Investigations of SHM Technologies under Quasi-Realistic Loading Conditions" Aerospace 8, no. 11: 320. https://doi.org/10.3390/aerospace8110320

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