期刊
FINITE ELEMENTS IN ANALYSIS AND DESIGN
卷 46, 期 11, 页码 1001-1007出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.finel.2010.07.006
关键词
Representative unit cells; Finite element method; Periodic boundary conditions; Syntactic foam; Effective elastic moduli
The macroscopic elastic behavior of hollow microsphere filled composites, collectively known as syntactic foams, is studied using analytical and numerical methods. In the analytical model, the effective bulk modulus is first estimated, and then using solid harmonics appropriate for a uniaxial tensile field, the effective Poisson's ratio of the composite is determined. The macroscale material properties are also estimated using finite element (FE) analysis of representative unit cells. Using the analytical model, the applicability of unit cell FE methods in the estimation of effective elastic properties of the syntactic foam is assessed. The influence of particle distribution on the elastic moduli is studied using a full three-dimensional (3D) FE method. The moduli obtained for different distributions showed little scatter, and the average values of bulk modulus match closely with the analytical results. (C) 2010 Elsevier B.V. All rights reserved.
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