EXPERIMENTAL AND NUMERICAL STUDY OF SEWING SEAMS OF AUTOMOBILE SEAT COVERS UNDER UNIDIRECTIONAL AND MULTIAXIAL LOADING

Year 2019, Volume: 29 Issue: 4, 322 - 335, 31.12.2019

Natalia Kovalova

https://doi.org/10.32710/tekstilvekonfeksiyon.495322

Cited By: 2

Abstract

In industrial
textiles, knowing the exact characteristics and behaviour of materials is
important. A several precise studies and numerical models of material
structures of fabrics, foams, and threads have been developed, but the behaviours
of entire functional parts have been researched to a lesser extent. 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

Keywords

sewing seam, strength, 3D curves, parts contact, numerical model

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