Viscoelastic behavior of a composite beam using finite element method: Experimental and numerical assessment
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© QinetiQ Ltd 2013. Among the passive control techniques for vibration attenuation in composite structures demonstrated in the last decades, the use of viscoelastic material as a damping core in laminated beam like components is an interesting possibility but has not yet received sufficient attention so far. In order to gain an insight into this interest and develop more accurate and efficient viscoelastic-based vibration control methods, this paper presents a finite element method (FEM) for damping modeling of a multilayer composite structure, with a viscoelastic core sandwiched between elastic layers including piezoelectric layers. Emphasis is put not only on the numerical modeling integrating FEM with the Golla-Hughes-McTavish (GHM) and the Anelastic Displacement Fields (ADF) method method, which is used to illustrate the effects of viscoelastic layer and the vascular cooling channels, but also on practical engineering aspects related with the use of modal testing for the experimental assessment of efficiency of damping treatments. In particular, different configurations of damping treatments, spatial FE modeling, mathematical descriptions of viscoelastic frequency-dependent material damping and their implementation into FE frameworks and the use of different solution methods are discussed.
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