Title: On modelling brick/mortar interface via a St. Venant-Kirchhoff orthotropic soft interface. Part I: theory

Authors: Maria Letizia Raffa; Frédéric Lebon; Raffaella Rizzoni

Addresses: LMA-CNRS UPR 7051, Aix-Marseille University, 4 Impasse Nikola Tesla CS 40006 - 13453, Marseille Cedex 13, France ' LMA-CNRS UPR 7051, Aix-Marseille University, Centrale Marseille, 4 Impasse Nikola Tesla CS 40006 - 13453, Marseille Cedex 13, France ' Department of Engineering, University of Ferrara, via Saragat 1 - 44121 Ferrara, Italy

Abstract: In this paper, a nonlinear-imperfect interface model is proposed in order to model brick/mortar-interface behavior in small masonry assemblies. The proposed model, formulated according a micromechanical strategy, derives from a consolidated approach coupling arguments of asymptotic analysis and homogenisation method. The adopted asymptotic technique is extended to the finite strain theory. The homogenisation strategy, under the non-interacting approximation, is extended to microcracked-orthotropic-hyperelastic materials. Simple numerical simulations, developed within the framework of finite element method, highlight the model soundness and its applicability in finite-strain problems.

Keywords: asymptotic analysis; finite elasticity; imperfect interface; masonry structures; orthotropic interphase; thin films; modelling; brick-mortar interface; micromechanics; finite strain theory; microcracking; hyperelastic materials; numerical simulation; finite element method; FEM.

DOI: 10.1504/IJMRI.2016.077470

International Journal of Masonry Research and Innovation, 2016 Vol.1 No.2, pp.142 - 164

Received: 22 Sep 2015
Accepted: 17 Dec 2015

Published online: 02 Jul 2016 *

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