3-Dimensional Homogenization Finite Element Analysis of Foamed Rubber

International Rubber Conference

Matsuda, A.^1 ; Oketani, S.^2

Faculty of Engineering,Information and Systems, University of Tsukuba, Ibaraki, Japan^1

Graduate School of Systems and Information Engineering, University of Tsukuba, Ibaraki, Japan^2

关键词: Homogenization theory;    Hyperelastic materials;    Mechanical characteristics;    Microscopic structures;    Mooney-Rivlin model;    Nearly incompressible;    Periodic boundary conditions;    Tensile-loading tests;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/548/1/012012/pdf
DOI  :  10.1088/1757-899X/548/1/012012

来源: IOP

【 摘 要 】

In this study, 3-dimensional homogeneous finite element analysis of a truncated octahedral unit cell which consisted of hyperelastic beams was conducted to predict macroscopic mechanical characteristics of the foam rubbers considering its microscopic structure. The homogenization theory was applied to finite element analysis code and the unit cells for simulation were assumed to have the periodic boundary condition. An original finite-strain homogenization FEM code for hyperelastic material and truncated octahedral unit cell were developed. The relative density of the homogenization analysis was adjusted by width of the beams in unit cell model. The rubber matrix was assumed to be represented by the nearly-incompressible hyperelasticity. The Mooney-Rivlin model and nearly-incompressible condition were applied to the hyperelasticity. The material parameters of the Mooney-Rivlin model for foamed rubber matrix were identified by the tensile loading test results. The developed code showed enough stability to predict the mechanical property of foamed rubber in the large strain region.