Effects of Misoriented Short-Fibers in a Plane of a Composite Material on its Macroscopic Elastic Modulus

Abstract

Tensile tests are performed to composite materials containing various aspect ratios and orientation angles of fiber bundle in a plane. Their macroscopic elastic modulus is evaluated and it value is compared to the result obtained by micromechanical analysis to the composites. In analysis, the fiber bundle is modeled as a fiber with same diameter. Analytical results are good agreement with the center values in experimental ones irrespective of volume fraction of fiber bundle. However, scatter of the experimental results cannot explain by the analytical model. It is caused by the cluster effect of fiber bundle and macroscopic clustering of fiber bundles.