Experimental and Numerical Study of Sewing Seams of Automobile Seat Covers Under Unidirectional and Multiaxial Loading

Abstract

In industrial textiles, knowing the exact characteristics and behaviour of materials is important. For car seats, industrial textiles not just cover the underlying foam but also increase rigidity of the seat cushion and influence viscoelastic behaviours of foams. Moreover, strength of sewn seams is one of the main quality parameters. Herein, four polyester and polyamide threads were sewn on a material used for car seat covers through lockstitch sewing. Combinations of these materials were studied using static tests in the unidirectional and multiaxial variants. The experimental measurements recorded using a high-speed camera and computer tomography were used to create CAD models. Numerical simulations were conducted using these models and the obtained material models. These model studies help predict and describe the stresses emerging within various types of textile and the threads in their connections. The simulation results agree well with the experimental results.

Effects of Different Stitch Types and Stitch Combinations on the Seam Bursting Strength and Seam Strength of Workwear

“…In one of the related studies, effects of different seam types (sewn with stitch type ISO 401) on the multiaxial strength of selected woven and knitted fabrics were determined [27]. In another study, the multiaxial seam strength of sewn automobile seat covers (sewn with lock stitch) was determined by a self-developed bursting apparatus [28]. Rajput et al studied the effects of 3 stitch types, 3 fabric types and sewing yarn fineness on the hydraulic bursting strength of knitted fabrics [29].…”

Investigating the Effect of Fabric and Lamination-Foam Properties on the Air Permeability of Laminated Headrest Fabrics

“…Automotive textiles have a large share in the global technical textiles market, which is comprised of seat upholstery, floor covering, headliners, door coverings, pillar coverings, safety belts, side panel coverings, airbags, tires, sound, and thermal insulators [1,2]. Automotive interior textiles are usually made of woven, warp knitted, weft knitted, laminated and nonwoven fabrics [3,4].…”