Multiscale stochastic stress analysis for elastic properties random variation of unidirectional fiber reinforced composite materials considering fiber orientation

Abstract

Multiscale stochastic stress analysis of unidirectional fiber reinforced composites considering microscopic randomness has been reported in recent, but most of them consider the fiber direction or transverse direction loading. On the other hand, unidirectional fiber reinforced composites are used at arbitrary orientation angles in forms such as laminated materials, so it is necessary to consider influence of fiber orientation when analyzing the stochastic problem. In this report, the influence of fiber orientation angle on the stochastic properties of microscopic stresses is investigated with using multiscale stochastic stress analysis considering the variation of elastic properties component materials of a unidirectional fiber reinforced composite material for various fiber orientation, and the effectiveness of a perturbation-based approach for this problem is investigated.