Joining High Thickness Materials by Sewing – first Modelling Steps of the Stitched Place

Abstract

Many textile products are using materials with higher thickness like foams, spacer fabrics and nonwoven materials in order to provide comfortable softness of the contact surface to the body. Such materials are often joint to another external layer who have to provide optical and mechanical stability of the system, and are joined together into a 3-dimensional geometry. This paper analyses some steps of joining such materials by sewing. The forces in the sewing threads are analyzed analytically. A numerical model based on finite element method (FEM) is implemented in LS-Dyna and the process of compaction of the sewing line, based on the thread force is simulated. The thread force propagation is numerically analyzed in the time, at different friction coefficients and for different foam stiffness. All simulations demonstrate logical results and can be used as a fundament for more complex investigations and optimizations of such products.

The Effect of Selected Factors on the Strength of Stitches of Upholstery Faux Leather

“…The finite element method was used for stitch analysis [ 22 ]. The analysis of the thread tension demonstrates that the upper and bottom thread tension mainly influences the formation of the current stitch, and the force cannot cause redistribution or slippage of the previous, already build stitches.…”

Simulation and prediction of seam puckering in the layers of woven fabrics using a yarn-level model

“…The fabric was modeled as a continuous shell, and the force resulting from the contraction of the sewing threads was applied to the fabric as a compressive force from the seam side. Kyosev and Kuhn (2022) evaluated some steps of sewing materials with higher thickness like foams and spacer fabrics by implementing a numerical model based on finite element method.…”