Abstract:

A modified mass-spring model was proposed in order to improve the structural deformation simulation of double jacquard warp-knitted fabrics. Geometrical loops models, including stitch, fall-plate and inlay, were built first based on analyzing influencing factors and features of deformation. By modifying the traditional mass-spring model, root of the loop model was referred as a mass particle, and underlaps between stitches were regarded as different kinds of springs. According to characters of double jacquard fabrics, two sets of spring systems were built with an additional set of hypothetical mass particles, correspondingly for fall-plate and inlay jacquard structures. Particles’ resultant force, motion state and deformation were calculated with Newton Second law and explicit Euler method. With the present mass-spring models and mechanical analysis method, two-dimensional deformation simulation was realized via VC++, and then was proven by comparing real sample and simulation effect.

Key words: warp-knitting, jacquard fabric, fall-plate jacquard, inlay jacquard, mass-spring system, simulation