Abstract: In this paper, the finite element model of fibers in the spinning triangle based on the mechanical properties of fiber is built. Then, the deformation of fibers at spinning triangle is simulated using ANSYS13.0 software. Next, the effect of deformation of fibers on yarn properties is analyzed combining with the experimental spinning .Under the same conditions, the difference of fibers deformation is presented and the performance indexes are tested between JC14.6tex ring spun yarn and Sirospun yarn. The results indicate that the deformation of fibers at spinning triangle is symmetric along the center line of triangle; the relationship is closely between the deformation of fibers and the shape of spinning triangle; compared with the ring spinning, the deformation of fiber at the Sirospun spinning triangle is apparently smaller and the consistency of deformation of fibers is fine ; the influence of deformation of fibers on yarn hairiness and yarn strength is important.

Key words: spinning triangle, finite element, ring spun yarn, Sirospun yarn, deformation of fiber