An asymptotic derivation of a general imperfect interface law for linear multiphysics composites

[摘要] The paper is concerned with the derivation of a general imperfect interface law in a linear multiphysics framework for a composite, constituted by two solids, separated by a thin adhesive layer. The analysis is performed by means of the asymptotic expansions technique. After defining a small parameter epsilon, which will tend to zero, associated with the thickness and the constitutive coefficients of the intermediate layer, we characterize three different limit models and their associated limit problems: the soft interface model, in which the constitutive coefficients depend linearly on epsilon; the hard interface model, in which the constitutive properties are independent of epsilon; the rigid interface model, in which they depend on 1/epsilon. The asymptotic expansion method is reviewed by taking into account the effect of higher order terms and by defining a general multiphysics interface law which comprises the above aforementioned models. (C) 2019 Elsevier Ltd. All rights reserved.

[发布日期] 2019-12-15

[关键词] Asymptotic analysis;Interfaces;Multiphysics materials