Model updating of uncertain parameters of carbon/epoxy composite plates using digital image correlation for full-field vibration measurement

Cuadrado, Manuel; Pernas-Sánchez, J.; Artero-Guerrero, J.A.; Varas, D.

doi:10.1016/j.measurement.2020.107783

Cited by 20 publications

(9 citation statements)

References 26 publications

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“…Instead, this test supplied much more energy in a single impact to produce higher perturbation and less noisy measurement than a hammer would have produced in a panel of that size and stiffness. Previous studies performing modal identification with DIC measurement in impact hammer tests were performed on light and flexible components with low constraints (typically under free–free boundary conditions) [ 12 , 17 , 27 , 46 ] in contrast to this panel, with stiffeners and a metallic frame constraining the boundaries.…”

Section: Experimental Methodology and Analysismentioning

confidence: 99%

Full-Field Operational Modal Analysis of an Aircraft Composite Panel from the Dynamic Response in Multi-Impact Test

Molina-Viedma

López‐Alba

Felipe-Sesé

et al. 2021

Sensors

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Experimental characterization and validation of skin components in aircraft entails multiple evaluations (structural, aerodynamic, acoustic, etc.) and expensive campaigns. They require different rigs and equipment to perform the necessary tests. Two of the main dynamic characterizations include the energy absorption under impact forcing and the identification of modal parameters through the vibration response under any broadband excitation, which also includes impacts. This work exploits the response of a stiffened aircraft composite panel submitted to a multi-impact excitation, which is intended for impact and energy absorption analysis. Based on the high stiffness of composite materials, the study worked under the assumption that the global response to the multi-impact excitation is linear with small strains, neglecting the nonlinear behavior produced by local damage generation. Then, modal identification could be performed. The vibration after the impact was measured by high-speed 3D digital image correlation and employed for full-field operational modal analysis. Multiple modes were characterized in a wide spectrum, exploiting the advantages of the full-field noninvasive techniques. These results described a consistent modal behavior of the panel along with good indicators of mode separation given by the auto modal assurance criterion (Auto-MAC). Hence, it illustrates the possibility of performing these dynamic characterizations in a single test, offering additional information while reducing time and investment during the validation of these structures.

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Section: Experimental Methodology and Analysismentioning

confidence: 99%

Full-Field Operational Modal Analysis of an Aircraft Composite Panel from the Dynamic Response in Multi-Impact Test

Molina-Viedma

López‐Alba

Felipe-Sesé

et al. 2021

Sensors

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“…3 In addition, the FEM can be a useful tool for detecting spurious modes of complicated geometries that are usually hard to identify with experimental procedures. 24 In one study by Lauwagie et al, 25 a multi-model approach is used to analyze layered materials in which the material properties of each layer are evaluated. Using this model, the elastic properties of all layers are extracted from the database of the FEM.…”

Section: Introductionmentioning

confidence: 99%

“…20 For instance, Sun et al 6 showed that all existing damping mechanisms in a given system other than the material damping, which are usually neglected by researchers, have a significant effect on frequency response function (FRF) amplitudes of a viscoelastic specimen, especially around resonance frequencies while they have a negligible effect on natural frequency values. Furthermore, Cuadrado et al 24 concluded that MAC values are not sensitive to modal parameters, and hence, MAC values are not included in the objective function of their modal updating study.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Comparison and investigation of inverse identification techniques for the material properties of a brake disc through experimental and numerical modal analysis

Balcı

Yavuz

Özkan

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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In the present study, a fast and accurate procedure for the inverse identification of material properties of a brake disc is proposed through the results of numerical and experimental modal analyses, where a particular attention is given to different objective functions and weighting. First, experimental and numerical modal analyses are conducted to obtain the natural frequencies and corresponding mode shapes. Second, design of experiment (DoE) methods are utilized to generate the meta-model of natural frequency results that are calculated numerically through finite element methods (FEMs). Several FEM simulations are run by altering critical material properties (density, Young’s modulus, and Poisson’s ratio) as independent variables according to the determined sample points by DoEs. Third, a second-degree response surface model is built by using linear regressions of simulation results. Predictive accuracies of two DoEs are investigated by the analysis of the residuals between FEM and meta-model results. Fourth, three different objective functions are adopted and used with 10 and 16 natural frequencies, with and without weighting, and compared with each other to investigate the effectiveness of functions and weighting for the particular problem. The sequential quadratic programming method is preferred for the minimization of the objective functions. As opposed to the related literature, weights of the objective functions are determined by variances of natural frequencies measured at different locations of the disc which are already required to obtain mode shapes. Therefore, a computationally and experimentally low-cost and fast identification process is attained. The results showed that the use of weights usually improves the accuracy of identification. Changing the number of included natural frequencies in the optimization process, where the third objective function is used, has a significant effect, especially on the identification of the Poisson’s ratio. Finally, a good correlation is achieved between experimental and computational frequencies updated by the optimum properties.

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“…In this case, the digital image correlation (DIC) can be applied, since it is a non-contact method and has got no inherent length scale. It is widely used in the determination of the behavior of composite materials at the macroscopic level [ 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 ], although several recent studies have reported on the application of the DIC in measuring the local strain fields. Berfield et al [ 28 ] used the DIC method for the determination of displacement fields near isolated silica microspheres embedded in polymer materials.…”

Section: Introductionmentioning

confidence: 99%

Determination of Local Strain Distribution at the Level of the Constituents of Particle Reinforced Composite: An Experimental and Numerical Study

Ogierman

Kokot

2020

Materials

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This paper is devoted to numerical and experimental investigation of the strain field at the level of the constituents of two-phase particle reinforced composite. The research aims to compare the strain distributions obtained experimentally with the results obtained by using a computational model based on the concept of the representative volume element. A digital image correlation method has been used for experimental determination of full-field strain. The numerical investigation was conducted by the finite element analysis of the representative volume element. Moreover, usage of the novel method of assessment of the speckle pattern applicability for the measurement of local fields by using the digital image correlation method has been proposed. In general, the obtained experimental and numerical results are in good agreement although some discrepancies between the results have been noticed and discussed.

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Model updating of uncertain parameters of carbon/epoxy composite plates using digital image correlation for full-field vibration measurement

Cited by 20 publications

References 26 publications

Full-Field Operational Modal Analysis of an Aircraft Composite Panel from the Dynamic Response in Multi-Impact Test

Full-Field Operational Modal Analysis of an Aircraft Composite Panel from the Dynamic Response in Multi-Impact Test

Comparison and investigation of inverse identification techniques for the material properties of a brake disc through experimental and numerical modal analysis

Determination of Local Strain Distribution at the Level of the Constituents of Particle Reinforced Composite: An Experimental and Numerical Study

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