種々の織構造を有する織物複合材料のマルチスケール損傷進展シミュレーション

Abstract

In this study, a multiscale damage simulation of woven composites with various weaving structures is conducted based on a homogenization theory. For this, the homogenization theory is reconstructed for 2×2 twill-woven laminate and 5H satin-woven laminates. The Hoffman's failure criterion is then introduced into the theory to determine the failure of fiber bundles and a matrix material, and the damage modes. The damages are expressed as reduction of stiffness according to the damage modes. The present method can efficiently analyze the macroscopic strength and the microscopic damage development of woven composites. This method is then applied to the damage simulation of plain/twill/satin-woven E-glass/vinylester laminates under on-axis uniaxial tension. It is shown that the weaving structures affect the macroscopic strength of the laminates, which is attributable to the difference in the microscopic damage development in the laminates depending on the weaving structures.