Validation of a new numerical weaving tool highlighting the influence of real yarn positions and shapes on their behaviour under impact
Résumé
In this study, a numerical simulation approach is used to measure the influence of yarn positions
inside a 3D warp interlock fabric submitted to impact. Four numerical results have been compared to one
experimental impact test.
A first simulation is made directly from the experimental tomographic view of the woven fabric to agree with
the real positions and sections of threads. A second simulation is made with an ideal finite element (FE)
model of the 3D woven architecture obtained by our automatic tool Ktex-Pattern©™. In order to improve the
volume rate of fibers, two other calculations are made by a modification of the woven structure. The maximal
displacement and the characteristic duration of the ball penetration enable us to compare the simulations
and experiments. Additionally, we focus on a genuine method to generate automatically the most realistic
and reliable FE model of a weave diagram.