On the Analysis of Viscoelastic Materials for Active Constrained Layer Damping Treatments

Liao, Wei-Hsin; Wang, K.W.

doi:10.1006/jsvi.1997.1106

Cited by 70 publications

(36 citation statements)

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“…Lam et al [8] applied an LQR algorithm associated with the GHM frequency-dependence model to study several hybrid damping con"gurations. The same approach was applied by Liao and Wang [9] for the parametric analysis of ACL treatments. The drawback of the LQR control algorithm is that it requires the measurement of all state variables.…”

Section: Introductionmentioning

confidence: 91%

“…Analysis of an ACL treatment was also made by Lesieutre and Lee [2] using the ADF model with a proportional}derivative controller. However, as in reference [9], a single-term model was considered, leading to unreal material behavior. It was shown in reference [2] that although proportional and derivative controllers su!er from spillover e!ects, viscoelastic damping increases their stability margins thus preventing destabilization.…”

Section: Introductionmentioning

confidence: 99%

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Piezoelectric Active Vibration Control of Damped Sandwich Beams

Trindade¹,

Benjeddou²,

Ohayon³

2001

Journal of Sound and Vibration

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Section: Introductionmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Piezoelectric Active Vibration Control of Damped Sandwich Beams

Trindade¹,

Benjeddou²,

Ohayon³

2001

Journal of Sound and Vibration

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“…(2.22)-(2.25) in Fan and Wang (2003b) for the Kelvin-type interface]. In fact thin viscoelastic damping layers can be artificially introduced into smart/intelligent structures to produce higher and tailorable damping in vibration control (Baz, 1993;Shen, 1994;Haung et al, 1996;Liao and Wang, 1997;Lee and Kim, 2001;Sun and Tong, 2003). To the best of the authors' knowledge, the viscoelastic behavior of the interface in piezoelectric composite has not yet been touched despite the fact that existence of a viscoelastic interface will definitely influence the response of the piezoelectric composite.…”

Section: Introductionmentioning

confidence: 98%

Interaction between a screw dislocation and a viscoelastic piezoelectric bimaterial interface

Wang

Pan

2008

International Journal of Solids and Structures

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The complex variable method is employed to derive analytical solutions for the interaction between a piezoelectric screw dislocation and a Kelvin-type viscoelastic piezoelectric bimaterial interface. Through analytical continuation, the original boundary value problem can be reduced to an inhomogeneous first-order partial differential equation for a single function of location z = x + iy and time t defined in the lower half-plane, which is free of the screw dislocation. Once the initial, steady-state and far-field conditions are known, the solution to the first order differential equation can be obtained. From the solved function, explicit expressions are then derived for the stresses, strains, electric fields and electric displacements induced by the piezoelectric screw dislocation. Also presented is the image force acting on the screw dislocation due to its interaction with the Kelvin-type viscoelastic interface. The derived solutions are verified by comparing with existing solutions for the simplified cases, and various interesting features are observed, particularly for those associated with the image force.

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“…One major area of application of damping is in the reduction of vibration in aircraft panels [1,2] and railway carriages [3]. The conventional method of improving damping in structures and devices is based on the incorporation of either, a viscoelastic material [4], carbon fiber pre-impregnated material [5], or magnetostrictive particle [6]. Recently, carbon nanotube (CNT) has emerged as a candidate damping material [7,8].…”

Section: Introductionmentioning

confidence: 99%

Viscoelastic Properties of Montmorillonite Clay/Polyimide Composite Membranes and Thin Films

Iroh

Longun

2011

J Inorg Organomet Polym

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Montmorillonite clay, cloisite 30B (nanoclay), was successfully dispersed in a polyimide (PI) matrix by in situ condensation polymerization followed by solution casting and thermal imidization. Wide angle X-ray diffraction, WAXD, test was used to study the structure of cloisite 30B clay powder and nanoclay/polyimide composites. The WAXD spectra of nanoclay powder and the composites show one major diffraction peak at 4.76°and 6°, respectively, suggesting that the d-spacing of nanoclay was decreased by about 26% after composite film processing. The viscoelastic property of polyimide and nanoclay/polyimide composite was studied by using dynamic mechanical spectrometer. The storage modulus and glass-rubber transition temperature of nanoclay/polyimide composites increases with increasing volume fraction of clay. The storage modulus of the composites in the rubbery plateau region, (T [ 400°C) increased remarkably with increasing volume fraction of clay. A modulus enhancement, (E C /E M ) of about three orders of magnitude, (E C /E M *1,440) was obtained for nanoclay/polyimide composite containing 6.8 vol% of nanoclay. The tangent of the loss angle (tan d) for the composites, decreased with increasing volume fraction of nanoclay. The observed decrease in tan d with increasing volume fraction of clay is consistent with the established trend of increasing storage modulus and glassrubber transition temperature with increasing volume fraction of nanoclay. The phenomenal increase in the rubbery plateau storage modulus and glass-rubber transition temperature with increasing volume fraction of clay is believed to be due to increased restriction of chain motion with increasing nanoclay volume fraction.

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On the Analysis of Viscoelastic Materials for Active Constrained Layer Damping Treatments

Cited by 70 publications

References 0 publications

Piezoelectric Active Vibration Control of Damped Sandwich Beams

Piezoelectric Active Vibration Control of Damped Sandwich Beams

Interaction between a screw dislocation and a viscoelastic piezoelectric bimaterial interface

Viscoelastic Properties of Montmorillonite Clay/Polyimide Composite Membranes and Thin Films

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