Numerical Modeling of the Compression Process of Elastic Open-cell Foams

The random models of open-cell foams that can reflect the actual cell geometrical properties are constructed with the Voronoi technique. The compression process of elastic open-cell foams is simulated with the nonlinear calculation module of finite element analysis program. In order to get the general results applicable to this kind of materials, the dimensionless compressive stress is used and the stress-strain curves of foam models with different geometrical properties are obtained. Then, the influences of open-cell geometrical properties, including the shape of strut cross section, relative density and cell shape irregularity, on the compressive nonlinear mechanical performance are analyzed. In addition, the numerical results are compared with the predicted results of cubic staggering model. Numerical results indicate that the simulated results reflect the compressive process of foams quite well and the geometrical properties of cell have significant influences on the nonlinear mechanical behavior of foams.

作 者： ZHANG Jia-lei LU Zi-xing   作者單位： Institute of Solid Mechanics, Beijing University of Aeronautics and Astronautics, Beijing 100083, China  刊 名： 中國航空學報（英文版）  ISTIC 英文刊名： CHINESE JOURNAL OF AERONAUTICS  年，卷(期)： 2007 20(3)  分類號： V2  關鍵詞： Voronoi technique   open-cell foam   nonlinear   compressive stress  

【Numerical Modeling of the Compressio】相關文章：

Progress in modeling of fluid flows in crystal growth processes04-26

A kinetic modeling study of pollutant formation in premixed hydrocarbon flames04-25

NUMERICAL EXPERIMENTS ON THE IMPACTS OF SEA SPRAY ON TROPICAL CYCLONES04-27

Numerical Approximation of a Reaction-Diffusion System with Fast Reversible Reaction04-26

Numerical model of flow and pollutant transportation in non-orthogonal curvilinear coordinates04-26

Automated Separation of Stars and Normal Galaxies Based on Statistical Mixture Modeling with RBF Neural Net-works04-27

Coupled Numerical Analysis of the Stability Behaviour of Unsaturated Soil Slopes Under Rainfall Conditions04-27

EXPERIMENTS ON ASSIMILATION OF INITIAL VALUES IN NUMERICAL PREDICTION OF A WARM-SECTOR PRECIPITATION IN SOUTH CHINA04-27

NUMERICAL SIMULATION STUDY OF THE INNER-CORE STRUCTURES AND THE MECHANISM FOR INSHORE STRENGTHENING OF SOUTH CHINA SEA T04-27