A shape sensing methodology for beams with generic cross-sections: Application to airfoil beams

Roy, Rinto; Gherlone, Marco; Surace, Cecilia

doi:10.1016/j.ast.2020.106484

Cited by 26 publications

(17 citation statements)

References 17 publications

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“…Savino et al (2020) constructed the iFEM formulation for curved beam using the second-order Hermite polynomials as shape functions. Roy et al (2021) advanced the standard iFEM for beams to account for shear strain variation due to shear and torsional loading for any general beam profile. You and Ren (2021) developed an enhanced inverse beam element iEBT2 for Euler-Bernoulli beam, introducing weighting constants to penalize missing data due to damaged sensors.…”

Section: Introductionmentioning

confidence: 99%

Full-field displacement and strain reconstruction for beam structures based on the extended inverse finite element method

Zhu

Tang

2023

Advances in Structural Engineering

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The inverse finite element method (iFEM) is a superior shape sensing methodology in the field of structural health monitoring. However, the standard iFEM for beams yields only displacements at iFEM nodes whose spatial resolution is limited by the number of strain measurements. This study presented an extended iFEM that renders high-quality full-field displacement and strain fields by interpolating the displacements and strains at all locations on the beam using elemental shape functions. A series of numerical studies were implemented to verify the extended iFEM algorithm for various sensor and mesh configurations under different boundary and loading conditions. It showed that the extended iFEM gives smoother and more accurate results using far fewer inverse elements than the standard iFEM.

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Section: Introductionmentioning

confidence: 99%

Full-field displacement and strain reconstruction for beam structures based on the extended inverse finite element method

Zhu

Tang

2023

Advances in Structural Engineering

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“…Furthermore, a variety of inverse-beam elements were developed for displacement monitoring of thick/thin beam structures [50][51][52][53]. Numerous combined experimental and numerical studies have proven their high efficiency and accuracy for real-time deformed shape detection [54][55][56][57].…”

Section: Introductionmentioning

confidence: 99%

Coupling of peridynamics and inverse finite element method for shape sensing and crack propagation monitoring of plate structures

Kefal

Diyaroglu

Yıldız

et al. 2022

Computer Methods in Applied Mechanics and Engineering

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“…Several formulations of the method have been proposed, based on the definition of different inverse elements. Beam elements have been formulated for the monitoring of truss and beam structures [ 24 , 25 , 26 , 27 ]. Three-nodes inverse shell elements have been widely used for the analysis of thin plates [ 28 , 29 ] and thin walled structures [ 30 , 31 ].…”

Section: Introductionmentioning

confidence: 99%

Experimental Shape Sensing and Load Identification on a Stiffened Panel: A Comparative Study

Esposito

Mattone

Gherlone

2022

Sensors

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The monitoring of loads and displacements during service life is proving to be crucial for developing a modern Structural Health Monitoring framework. The continuous monitoring of these physical quantities can provide fundamental information on the actual health status of the structure and can accurately guide pro-active condition-based maintenance operations, thus reducing the maintenance costs and extending the service life of the monitored structures. Pushed by these needs and by the simultaneous development in the field of strain sensing technologies, several displacement reconstruction and load identification methods have been developed that are based on discrete strain measurements. Among the different formulations, the inverse Finite Element Method (iFEM), the Modal Method (MM) and the 2-step method, the latter being the only one able to also compute the loads together with the displacements, have emerged as the most accurate and reliable ones. In this paper, the formulation of the three methods is summarized in order to set the numerical framework for a comparative study. The three methods are tested on the reconstruction of the external load and of the displacement field of a stiffened aluminium plate starting from experimentally measured strains. A fibre optic sensing system has been used to measure surface strains and an optimization procedure has been performed to provide the best fibre pattern, based on five lines running along the stiffeners’ direction and with a back-to-back measuring scheme. Additional sensors are used to measure the applied force and the plate’s deflection in some locations. The comparison of the results obtained by each method proves the extreme accuracy and reliability of the iFEM in the reconstruction of the deformed shape of the panel. On the other hand, the Modal Method leads to a good reconstruction of the displacements, but also exhibits a sensitivity to the choice of the modes considered for the specific application. Finally, the 2-step approach is able to correctly identify the loads and to reconstruct the displacements with an accuracy that depends on the modeling of the experimental setup.

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A shape sensing methodology for beams with generic cross-sections: Application to airfoil beams

Cited by 26 publications

References 17 publications

Full-field displacement and strain reconstruction for beam structures based on the extended inverse finite element method

Full-field displacement and strain reconstruction for beam structures based on the extended inverse finite element method

Coupling of peridynamics and inverse finite element method for shape sensing and crack propagation monitoring of plate structures

Experimental Shape Sensing and Load Identification on a Stiffened Panel: A Comparative Study

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