Paper number 642

DETERMINATION OF COMPOSITE MATERIAL CONSTANTS BY DIRECT NUMERICAL SIMULATION

Jin Yeon Cho^*, Jeong Ho Kim^**, Chang Sung Lee and Seung Jo Kim

*Department of Aerospace Engineering, Seoul National University
**San 56-1, Shillim-Dong, Kwanak-Ku, Seoul 151-742, Korea

Summary

A numerical analysis to predict the elastic material properties of composite structures is accomplished by the Direct Numerical Simulation (DNS) of composite materials and a developed multifrontal code is used. It is paramount in this approach that no artificial assumption for loading or deformation is needed and a highly detailed microstructures of composite structures can be described. In the present analysis, some virtual experiments are executed and the effective elastic moduli of boron/aluminum composites like boron/aluminum are obtained. The results of DNS are compared with the existing theoretical predictions and available experimental data. The validity of basic assumptions applied at theoretical approach are checked and the effects of micro-structures, such as irregular arrangement of fiber on material constants are inspected.

Keywords

mechanical properties, micromechanics, Finite Element Method (FEM), direct numerical simulation (DNS).