Health Monitoring of Aerospace Structures via Dynamic Strain Measurements: An Experimental Demonstration

Martins, Benjamin L.; Kosmatka, J. B.

doi:10.2514/6.2020-0701

Cited by 5 publications

(2 citation statements)

References 4 publications

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“…In the last decades, numerous SHM methods have been proposed and were successfully tested on simple specimens relevant to aircraft design in laboratory environments [13][14][15][16][17][18]. Recently, scaled demonstrators equipped with multiple sensors have also been built to develop and test the applicability of promising SHM methodologies [19][20][21]. SHM methods that are capable of monitoring large thin-walled structures, e.g., spoilers, are guided waves [22][23][24][25][26], electrical impedance tomography (EIT) through conductive surface layers [27,28], and direct measurements of a structure's electrical impedance [29].…”

Section: Introductionmentioning

confidence: 99%

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

2021

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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.

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Section: Introductionmentioning

confidence: 99%

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

2021

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“…In the last decades numerous structural health monitoring (SHM) methods have been proposed and were successfully tested on simple specimens relevant for aircraft design in laboratory environments [6][7][8][9]. Recently, also scaled demonstrators equipped with multiple sensors are being built to develop and test the applicability of promising SHM methodologies [10][11][12]. SHM methods which are capable of monitoring large thin-walled structures, e.g.…”

Section: Introductionmentioning

confidence: 99%

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

Winklberger,

Kralovec,

Schagerl

2021

Preprint

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An idealized demonstrator of an civil aircraft wing spoiler in scale 1:2 is developed to evaluate strain-based structural health monitoring (SHM) methods under realistic loading conditions. SHM promises to increase operational safety and reduce maintenance costs of optimized lightweight structures by its early damage detection capabilities. Also localization and size identification of damages could be shown for simple parts, e.g. beams or plates in many laboratory experiments. However, the application of SHM systems on real structures under realistic loading conditions is cost intensive and time consuming. Furthermore, testing facilities which are large enough to fit full scale aircraft parts are often not available. The proposed procedure of developing a scaled spoiler demonstrator under idealized loading and support conditions solves these issues for strain-based SHM. The procedure shows how to reproduce

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A Hardware Testbed for Dynamic Data-Driven Aerospace Digital Twins

Salinger

Kapteyn

Kays³

et al. 2020

Lecture Notes in Computer Science

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Health Monitoring of Aerospace Structures via Dynamic Strain Measurements: An Experimental Demonstration

Cited by 5 publications

References 4 publications

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

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

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

A Hardware Testbed for Dynamic Data-Driven Aerospace Digital Twins

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