Dynamic characterization of high damping viscoelastic materials from vibration test data

Martinez‐Agirre, Manex; Elejabarrieta, María Jesús

doi:10.1016/j.jsv.2011.03.025

Cited by 54 publications

(13 citation statements)

References 11 publications

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“…Therefore, the identification mainly focuses on the mechanical properties of the viscoelastic core layer. It has been well understood that the mechanical properties of viscoelastic materials are influenced by temperature and frequency, and only frequency dependence is taken into account in most studies because of the temperature-frequency superposition principle [5,6]. Scholars have proposed a variety of constitutive models of viscoelastic material, and those which are commonly used include the complex modulus model [7], the Golla-Hughes-McTavish (GHM) model [8], the anelastic displacement fields (ADF) model [9], and the fractional derivative model [10].…”

Section: Introductionmentioning

confidence: 99%

“…For a cantilever beam attached with FLD, Kim and Lee [14] obtained its frequency response function by motivating it with a hammer and used two steps to identify the fractional derivative model parameters. Martinez-Agirre and Elejabarrieta [6] did a similar study on a cantilever beam with CLD treatment, and identified the mechanical parameters of viscoelastic materials with high damping properties, mainly through minimizing the experimental and theoretical frequency response functions at certain discrete frequency points. Kim's and Martinez-Agirre's methods are not limited to the identification focused on the resonant frequency points, and thus, this work represents great progress in the identification study.…”

Section: Introductionmentioning

confidence: 99%

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Inverse Identification of the Frequency-Dependent Mechanical Parameters of a Viscoelastic Core Layer Based on the Vibration Response

et al. 2017

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The identification of the mechanical parameters of the viscoelastic core layer is of great significance for the modeling and damping design of the constrained layer damping (CLD) composite structure. In this study, based on the measured frequency vibration response of a CLD plate, an inverse approach was developed to identify the aforementioned parameters. Then, on the basis of considering both the viscoelastic material damping and the remaining equivalent viscous damping, the equation of motion of the CLD plate under base excitation was established and a method to obtain the vibration response was also presented. Further, a matching calculation based on sensitivity was proposed, to achieve the identification of the mechanical parameters. Finally, a CLD aluminum plate with a ZN_1 viscoelastic core layer was chosen to demonstrate the proposed method. In addition, the identification results were also introduced into the vibration response analysis and the rationality of the identified parameters were verified by comparing the vibration responses obtained by theoretical calculations and the experiment.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Inverse Identification of the Frequency-Dependent Mechanical Parameters of a Viscoelastic Core Layer Based on the Vibration Response

et al. 2017

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“…CFRP success relies not only on combining structural strength and stiffness with being light weight, but also on exhibiting superior damping characteristics as a result of the polymeric matrix, which makes them valuable allies for mitigating noise and vibration problems [9]. Indeed, the damping capacity of a material is evaluated by measuring the energy dissipated during mechanical vibrations [12].…”

Section: Introductionmentioning

confidence: 99%

Experimental Characterization of the Torsional Damping in CFRP Disks by Impact Hammer Modal Testing

et al. 2020

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Composite materials are widely used for their peculiar combination of excellent structural, mechanical, and damping properties. This work presents an experimental study on the dissipation properties of disk-shaped composite specimens exploiting vibration tests. Two different polymer matrix composites with the same number of identical laminae, but characterized by different stacking sequences, namely unidirectional and quasi-isotropic configurations, have been evaluated. An ad-hoc steel structure was designed and developed to reproduce an in-plane torsional excitation on the specimen. The main idea of the proposed approach relies on deriving the damping properties of the disks by focusing on the modal damping of the overall vibrating structure and, in particular, using just the first in-plane torsional deformation mode. Experimental torsional damping evaluations were conducted by performing vibrational hammer excitation on the presented setup. Two methods were proposed and compared, both relying on a single-degree-of-freedom (SDOF) approximation of the measured frequency response function (FRF).

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“…Now, some scholars have proposed several methods to identify the mechanical parameters of hard coating. In general, these methods can be classified into three classes, and they are the indentation method [11], bend tests method [12], and vibration tests method [7][8][9][13][14][15][16][17], respectively. Because the equipment is simple and easy to operate, the vibration tests method has been widely used recently.…”

Section: Introductionmentioning

confidence: 99%

“…The method applies an experimentalnumerical procedure and utilizes the minimizing difference between the theoretically and experimentally determined natural frequencies and vibration response to extract the mechanical parameters of coating material, so the method is named as inverse method. The inverse method has been wildly used for the identification of viscoelastic material parameters [15,16]. For the identification of hard-coating material, there are also several researchers to demonstrate the method.…”

Section: Introductionmentioning

confidence: 99%

Identifying the Mechanical Parameters of Hard Coating with Strain Dependent Characteristic by an Inverse Method

Sun

Wang

Zhu

et al. 2015

Shock and Vibration

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The mechanical parameters of hard coating, such as storage modulus and loss factor, are affected by preparation technology significantly and have the strain dependent characteristic. So the effective identification of these mechanical parameters becomes a challenge task. In this study, a hard-coating cantilever thin plate under base excitation was taken as the research object, and an inverse method was developed to identify these mechanical parameters. Firstly, the principles of identifying storage modulus and loss factor of hard coating were presented according to the inverse method. Then, from the need of parameters identification, the analytical model and calculation formula of equivalent strain for the hard-coating composite plate were derived. Next, also for parameter identification, the vibration experiments about the cantilever plate coated with NiCoCrAlY+ yttria-stabilised zirconia (YSZ) hard coating were performed. Finally, the mechanical parameters of NiCoCrAlY+YSZ hard coating with strain dependent characteristic were identified by the proposed method. The identification results show that the change rules of storage modulus and loss factor of hard coating with the strain amplitude are almost consistent with the results listed in the other similar references. However, the identification results herein can more directly serve for the dynamic modeling of hard-coating plate-shape composite structure.

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Dynamic characterization of high damping viscoelastic materials from vibration test data

Cited by 54 publications

References 11 publications

Inverse Identification of the Frequency-Dependent Mechanical Parameters of a Viscoelastic Core Layer Based on the Vibration Response

Inverse Identification of the Frequency-Dependent Mechanical Parameters of a Viscoelastic Core Layer Based on the Vibration Response

Experimental Characterization of the Torsional Damping in CFRP Disks by Impact Hammer Modal Testing

Identifying the Mechanical Parameters of Hard Coating with Strain Dependent Characteristic by an Inverse Method

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