Quantitative characterization of the fiber orientation variation in the Csf/Mg composites

Abstract

Based on the principal strain driven fiber orientation evolution mechanism, the fiber orientation variation factor V, which is a function of the principal strains, is proposed to quantitatively characterize the variation of fiber orientation angles in the extruded Csf/Mg composites. The FE analyses are implemented to numerically simulate the extrusion forming process of Csf/Mg composites. The fiber orientation variation factors predicted by the FE simulations are compared against those measured from the micrographs of the extrusion experiments of Csf/Mg composites. The results show that the fiber orientation variation factor V of the FE simulations and of the extrusion experiments match well such that the fiber orientation variation factor V is valid and convenient to characterize the fiber orientation variation in the extruded Csf/Mg composites. The distribution of the fiber orientation variation factors illustrates that the fibers in the extruded Csf/Mg composites are reoriented towards the direction of the maximum principal strain, and deviated from the directions of the medium and minimum principal strains.