Principal strain-induced fiber orientation evolution in the C_sf/Mg composites with a large deformation

Abstract

In this article, the fiber orientation evolution in the C sf /Mg composites with a large deformation is investigated. The principal strain-induced fiber orientation evolution mechanism, which states that the fiber orientation evolution in the C sf /Mg composites with a large deformation is determined by the principal strains, is proposed. The fiber orientation distribution factors F i ði ¼ 1, 2 and 3Þ taking the form of the principal strains are proposed to quantitatively characterize the fiber orientation distribution in the C sf /Mg composites. The fiber orientation factors F s i predicted by the finite element simulation based on the principal strain-induced fiber orientation evolution mechanism are compared against those F m i measured from the micrographs of the extrusion experiments of C sf /Mg composites. The results demonstrate that the principal strain-induced fiber orientation evolution mechanism is valid and convenient to predict the fiber orientation evolution in the C sf /Mg composites with a large deformation. In the extruded C sf /Mg composites, the fibers are reoriented toward the direction of the maximum principal strain and deviated from the direction of the minimum principal strain.

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

“…Ref. [23] proposed the fiber orientation factor F to characterize the fiber orientation distribution in the Csf/Mg composites.…”

“…In this article, the principal strain driven fiber orientation mechanism [23] is used to determine the fiber orientation evolution in the extruded Csf/Mg composites and a new expression i.e. the fiber orientation variation factor V to characterize the fiber orientation variation in the extruded Csf/Mg composites is proposed.…”

“…The FolgarTucker (FT) model [22] was used for the prediction of the fiber orientation in injection molded parts, with varying degrees of success. In a recent work [23] of authors the principal strains driven fiber orientation evolution mechanism which stated that the orientation evolution of fibers was determined by the principal strains, was proposed to predict the fiber orientation evolution in the extruded Csf/Mg composites.…”