Simulation of fiber arrangement in slub strands and twisting on the slub yarn with the finite element method

Abstract

Slub yarn is a popular yarn because of its distinctive appearance. In this paper, the simulation of the fiber arrangement in the slub strand is proposed. After twisting, the slub strand is converted into slub yarn. A cylinder with a large length–diameter ratio is used to simulate the fiber, and the random arrangement of the fibers forms the slub strand. Spring-damper-mass models are established to prevent cross-embedding among fibers and gather fibers along the slub strand axis. The slub strand is twisted by the roller-collet twisting model in ABAQUS software. By comparing the twisting effect, it can be seen that the twist distribution of the slub yarn simulated by the finite element method is consistent with the real slub yarn spun on a ring-spinning frame. The work can predict the twist change of slub yarn by the established model. The established model provides the basis for future research work on the properties of slub yarn.