Laminated beams with viscoelastic interlayer

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES

卷:49

Article

Galuppi, Laura¹  Royer-Carfagni, Gianni¹ 

[1] Univ Parma, Dept Civil Environm Engn & Architecture, I-43100 Parma, Italy

关键词: Viscoelastic composite beam;    Polymer;    Viscoelasticity;    Laminated glass;    Time-dependence;   

DOI  :  10.1016/j.ijsolstr.2012.05.028

来源: Elsevier

【 摘 要 】

We analytically solve the time-dependent problem of a simply-supported laminated beam, composed of two elastic layers connected by a viscoelastic interlayer, whose response is modeled by a Prony's series of Maxwell elements. This case applies in particular to laminated glass, a composite made of glass plies bonded together by polymeric films. A practical way to calculate the response of such a package is to consider also the interlayer to be linear elastic, assuming its equivalent elastic moduli to be the relaxed moduli under constant strain, after a time equal to the duration of the design action. The obtained results, that are confirmed by a full 3-D viscoelastic finite-element numerical analysis, emphasize that there is a noteworthy difference between the state of strain and stress calculated in the full-viscoelastic case or in the aforementioned equivalent elastic problem. (C) 2012 Elsevier Ltd. All rights reserved.

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