Viscoelastic materials characterisation using the seismic response

Cortés, Fernando; Elejabarrieta, María Jesús

doi:10.1016/j.matdes.2006.05.032

Cited by 54 publications

(25 citation statements)

References 5 publications

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“…Nevertheless, the main inconvenience of ASTM E 756-04 standard consists in introducing additional damping or mass through the excitation or through the measurement devices. Many authors investigated these inconveniences [11], which lead to generate alternative methods with improved accuracy [12][13][14][15][16][17][18][19][20].…”

Section: Experimental Characterization Of a Flexible Adhesivementioning

confidence: 99%

Dynamic Characterization of Adhesive Materials for Vibration Control

García-Barruetabeña¹,

Cortés²

2016

Adhesives - Applications and Properties

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This chapter focuses on the dynamic characterization of adhesive materials for vibration control proposes. First, the experimental characterization and modelization of the relaxation and complex moduli of the flexible adhesive ISR 70-03 by means of a dynamic mechanical thermal analysis technique (DMTA) are presented. Then, the interconversion path between the relaxation modulus EðtÞ and the corresponding complex modulus E Ã ðωÞ for linear viscoelastic solid materials is explored. In contrast to other approximate methods, in this work the fast Fourier transform (FFT) algorithm is directly applied on relaxation functions. Finally, an experimental study for the structural noise and vibration reduction in a cabin elevator by means of adhesive-bonded joints of panels is presented.

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Section: Experimental Characterization Of a Flexible Adhesivementioning

confidence: 99%

Dynamic Characterization of Adhesive Materials for Vibration Control

García-Barruetabeña¹,

Cortés²

2016

Adhesives - Applications and Properties

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“…The properties of the materials are taken from the experimental characterisation effectuated by Cortés and Elejabarrieta [25] on AISI T 316 L stainless steel laminated sheet and on Soundown Vibration Damping Tile material [26]. Indeed, Young's modulus and density of the elastic material are 1 = 176.2 × 10 9 Pa and 1 = 7782 kg/m 3 , respectively, and density of the damping material is 2 = 1423 kg/m 3 .…”

Section: Dynamic Analysis Of a Three-layer Sandwich Beam Using Finitementioning

confidence: 99%

Dynamic Analysis of Three-Layer Sandwich Beams with Thick Viscoelastic Damping Core for Finite Element Applications

Cortés

Sarría

2015

Shock and Vibration

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This paper presents an analysis of the dynamic behaviour of constrained layer damping (CLD) beams with thick viscoelastic layer. A homogenised model for the flexural stiffness is formulated using Reddy-Bickford's quadratic shear in each layer, and it is compared with Ross-Kerwin-Ungar (RKU) classical model, which considers a uniform shear deformation for the viscoelastic core. In order to analyse the efficiency of both models, a numerical application is accomplished and the provided results are compared with those of a 2D model using finite elements, which considers extensional and shear stress and longitudinal, transverse, and rotational inertias. The intermediate viscoelastic material is characterised by a fractional derivative model, with a frequency dependent complex modulus. Eigenvalues and eigenvectors are obtained from an iterative method avoiding the computational problems derived from the frequency dependence of the stiffness matrices. Also, frequency response functions are calculated. The results show that the new model provides better accuracy than the RKU one as the thickness of the core layer increases. In conclusion, a new model has been developed, being able to reproduce the mechanical behaviour of thick CLD beams, reducing storage needs and computational time compared with a 2D model, and improving the results from the RKU model.

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“…The properties of the materials are taken from the experimental characterisation effectuated by Cortés and Elejabarrieta (2007) on AISI T 316 L stainless steel laminated sheet and on Soundown Vibration Damping Tile material. Indeed, Young's modulus and density of the elastic material are E = 176.2 Â 10 9 Pa and q = 7782 kg/m 3 , respectively, and that of the damping material is q 1 = 1423 kg/m 3 .…”

Section: Problem Definitionmentioning

confidence: 99%

Structural vibration of flexural beams with thick unconstrained layer damping

Cortés

Elejabarrieta

2008

International Journal of Solids and Structures

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a b s t r a c tIn this paper, the dynamic behaviour of free layer damping beams with thick viscoelastic layer is analysed. A homogenised model for the flexural stiffness is formulated employing Reddy and Bickford's quadratic shear in each layer, in contrast to the classical model of Oberst and Frankenfeld for thin beams, which does not take into account shear deformations. The results provided by these two models in free and forced vibration are compared by means of finite element procedures with those of a 2D model, which considers extensional and shear stress, and longitudinal, transverse and rotational inertias.The viscoelastic material is characterised by a fractional derivative model, which takes into consideration the variation of the complex modulus with frequency. To avoid the frequency dependence of the stiffness matrices, the extraction of the eigenvalues and eigenvectors is completed by a new iterative method developed by the authors. The frequency response to a harmonic force is deduced by the superposition of modal contribution functions.From these numerical applications it can be concluded that the model for thick beams provides sufficient accuracy for practical applications, able to reproduce the mechanical behaviour of free layer damping beams with thick viscoelastic layer, reducing the storage needs and computational time with respect to a 2D model.

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Viscoelastic materials characterisation using the seismic response

Cited by 54 publications

References 5 publications

Dynamic Characterization of Adhesive Materials for Vibration Control

Dynamic Characterization of Adhesive Materials for Vibration Control

Dynamic Analysis of Three-Layer Sandwich Beams with Thick Viscoelastic Damping Core for Finite Element Applications

Structural vibration of flexural beams with thick unconstrained layer damping

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