A multiscale approach of nonlinear composites under finite deformation: Experimental characterization and numerical modeling

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES

卷:47

Article

Bouchart, V.¹  Brieu, M.²  Bhatnagar, N.³  Kondo, D.² 

[1] Lab Mecan Biomecan Polymere Struct LaBPS, EA 4632, F-57045 Metz 1, France

[2] CNRS, Lab Mecan Lille LML, UMR8107, F-59650 Villeneuve Dascq, France

[3] Indian Inst Technol, Dept Engn Mech, New Delhi, India

关键词: Hyperelastic materials;    Micromechanics;    Experimental study;    Composites;    Damage mechanics;   

DOI  :  10.1016/j.ijsolstr.2010.03.012

来源: Elsevier

【 摘 要 】

The present paper is devoted to the study of the mechanical behavior of an ethylene propylene diene monomer (EPDM) rubber reinforced by polypropylene (PP) particles, revealed as compressible The hyperlasttc behavior of this blend has been characterized under cyclic uni-axial tensile tests The experimental results show a significant effect of the fraction of (PP) particles (5%, 10%, 25% and 30% by weight) on the macroscopic behavior of the composite. In order to model this behavior, we first develop and implement a micromechanically-based nonlinear model for hyperelastic composites. The approach is based on the second order homogenization method proposed by Ponte Castaneda and Tiberio (2000) and for which suitable energy densities are adopted for the matrix and the inclusions phases, both assumed as compressible We then proceed to the model verification by comparison with Finite Element simulations on a unit cell Finally, we propose an extension of the model in order to take into account damage due to voids growth phenomena. The comparison of the multiscale damage model predictions with the experimental data obtained on the EPDM/PP composite indicates a very good agreement (C) 2010 Elsevier Ltd. All rights reserved

【 授权许可】

Free