抄録
This paper describes an analytical method for evaluating the elastic properties of three-dimensional fiber reinforced composite materials on the basis of a micro-mechanical analysis of a unit cell structure. The unit cell is a small repeating geometrical unit of fiber architecture. A special feature of this study is that we treat the unit cell as a rigid frame structure constructed of fiber-beam and matrix-beam elements. This analytical structure model can faithfully represent actual fiber composition. For two types of carbon/epoxy three-dimensional composite test specimens cut from an I-beam structure, the tensile elastic moduli are computed by the finite-element method. Comparisons between analytical and experimental results are also made. The results of this analytical method show good agreement with the experimental data.
