Numerical-experimental identification of the elastic and damping properties in composite plates

Matter, Marco; Gmür, Thomas; Botsis, J.; Schorderet, Alain

doi:10.1016/j.compstruct.2009.03.001

Cited by 58 publications

(39 citation statements)

References 24 publications

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“…Compared to the method proposed by ref. [2], it is considerably easier and faster to implement: only one vibrating point is measured, no FEM is needed; it also reaches frequency domains that are usually out of reach of the modal analyses based on the Fourier transform. Incidentally, the method presented here could be used to access the frequency-dependence of the loss factors by considering only modes in a given frequency range.…”

Section: Resultsmentioning

confidence: 99%

“…1 One must keep in mind that η γ ν is not the imaginary part of ν γ . 2 It can be the case when skins are made of metal.…”

Section: ) This Condition Is Not Satisfied Onlymentioning

confidence: 99%

“…Several authors have addressed the problem of the identification of elastic and damping properties of sandwich panels [1,2]. The honeycomb sandwich panels raise special difficulties.…”

Section: Introductionmentioning

confidence: 99%

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Identiﬁcation of honeycomb sandwich properties by high-resolution modal analysis

Rébillat

Boutillon²

2010

EPJ Web of Conferences

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Abstract.A method is proposed to identify the mechanical properties of the skin and core materials of honeycomb sandwich. All the elastic coefficients and loss-factors that matter in the dynamics of a panel in the thick-plate approximation are identified. To this end, experimental natural modes (i.e. eigenmodes of the damped system) are compared to the numerical modes of a large sandwich panel (l x,y /h ≃ 80). The chosen generic model for the visco-elastic behaviour of the materials is E(1 + jη). The numerical modes are computed by means of a Rayleigh-Ritz procedure and their dampings are predicted according to the visco-elastic model. The frequencies and dampings of the natural modes of the panel are estimated experimentally by means of a high-resolution modal analysis technique. An optimisation procedure yields the desired coefficients. A sensitivity analysis assess the reliability of the method.

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Section: Resultsmentioning

confidence: 99%

“…1 One must keep in mind that η γ ν is not the imaginary part of ν γ . 2 It can be the case when skins are made of metal.…”

Section: ) This Condition Is Not Satisfied Onlymentioning

confidence: 99%

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Identiﬁcation of honeycomb sandwich properties by high-resolution modal analysis

Rébillat

Boutillon²

2010

EPJ Web of Conferences

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“…Then, substitute the above results into (19), and we can determine the functional relation between the material loss factors 11 , 22 , and 12 and the modal damping ratio.…”

Section: Theoretical Calculation Of Modal Damping Ratio Of Composite mentioning

confidence: 99%

“…Shokrieh and Najafi [18] measured the specific damping capacity and loss factors of laminated polymer matrix composite under the frequency of 0.2 Hz-4 Hz, and its viscoelastic behavior was characterized by using a modified classical lamination theory. Matter et al [19] presented a mixed numerical-experimental identification method for estimating the loss factor of composite plates and shells, and the natural frequencies, modal damping factors, and mode shapes of the specimen were measured with an optimized contact-free experimental setup, which used a loudspeaker for exciting the structure and a scanning laser interferometer for measuring the dynamic response. Devalve and Pitchumani [20] investigated the damping effects of carbon nanotubes embedded in the matrix of fiber-reinforced composite material, and dynamic mechanical analysis (DMA) system was employed in the dual-cantilever mode of the composite beam to measure its material loss factor.…”

Section: Introductionmentioning

confidence: 99%

Identification of Loss Factor of Fiber-Reinforced Composite Based on Complex Modulus Method

Niu

et al. 2017

Shock and Vibration

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The identification of the loss factor of fiber-reinforced composite based on complex modulus method is presented. Firstly, the damping model of fiber-reinforced composite plate is established, and the relation between each loss factor and modal damping ratio is deduced based on the complex modulus method. Then, the least square relative error function is formed by using the modal damping ratio obtained in the experimental test, and the appropriate step-size is selected in the range of 0∼10% to calculate the loss factor. Next, the identification procedure of loss factor of such composite material is summarized, and the corresponding identification procedure is realized based on self-designed MATLAB program. Finally, TC300 carbon/epoxy composite plate is taken as an example to carry out a case study, and its loss factors along the longitudinal, transverse, and shear direction are identified by the complex modulus method. By comparing the measured damping results obtained in this paper and the calculated damping results based on the Adams-Bacon model with the same loss factor, it is found that the corresponding maximum deviation between them is less than 15%, so the correctness of such identification method has been verified indirectly, which can be used to identify loss factor of fiber-reinforced composite with high precision and efficiency.

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Experimental Modal Analysis for Identification of Laminated Glass Fiber Reinforced Plastic

Safonovs,

Kovalovs,

Chate

et al. 2024

Lecture Notes in Networks and Systems

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Numerical-experimental identification of the elastic and damping properties in composite plates

Cited by 58 publications

References 24 publications

Identiﬁcation of honeycomb sandwich properties by high-resolution modal analysis

Identiﬁcation of honeycomb sandwich properties by high-resolution modal analysis

Identification of Loss Factor of Fiber-Reinforced Composite Based on Complex Modulus Method

Experimental Modal Analysis for Identification of Laminated Glass Fiber Reinforced Plastic

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