Effective spring boundary conditions for a damaged interface between dissimilar media in three-dimensional case

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES

卷:81

Article

Golub, Mikhail V.¹  Doroshenko, Olga V.¹  Bostrom, Anders² 

[1] Kuban State Univ, Inst Math Mech & Informat, Krasnodar 350040, Russia

[2] Chalmers Univ Technol, Dept Appl Mech, SE-41296 Gothenburg, Sweden

关键词: Imperfect contact;    Delamination;    Elastic waves;    Spring boundary condition;    Spring stiffness;    Crack;    Diffraction;    Dissimilar materials;   

DOI  :  10.1016/j.ijsolstr.2015.11.021

来源: Elsevier

【 摘 要 】

Elastic waves in the presence of a damaged interface between two dissimilar elastic media is investigated in the three-dimensional case. The damaged is modeled as a stochastic distribution of equally sized circular cracks which is transformed into a spring boundary condition. First the scattering by a single circular interface crack between two dissimilar half-spaces is investigated and solved explicitly for normally incident waves in the low frequency limit. The transmission by a distribution of cracks is then determined and is transformed into a spring boundary condition, where effective spring stiffnesses are expressed in terms of elastic moduli and damage parameters. A comparison with previous results for a periodic distribution of cracks shows good agreement. (C) 2015 Elsevier Ltd. All rights reserved.

【 授权许可】

Free