Abstract

A model able to reproduce the tensile response of single continuous-filament yarns based on parameters derived from geometrical descriptors is presented in this paper. Samples of yarns made of polyester and aramid fibres were scanned at rest using X-ray microtomography, allowing a detailed identification of their fibre orientation distributions for different twists. The variation of the fibre packing density along with yarn extension was characterized by means of additional scans carried out during tensile tests. An analytical model of the tensile response of these yarns, based on the orientation distribution function and the evolution of the packing density identified from microtomography is proposed and validated against experimental results, with good agreements.

摘要

本文提出了一个模型，该模型能够基于从几何描述符导出的参数来再现单根连续丝纱线的拉伸响应。静止时使用X射线显微断层扫描技术扫描由聚酯纤维和芳纶纤维制成的纱线样品，以便详细识别不同捻度的纤维取向分布。纤维填充密度随纱线延伸的变化通过拉伸试验期间进行的附加扫描来表征。提出了一种基于取向分布函数和由显微断层扫描确定的堆积密度演变的纱线拉伸响应的分析模型，并与实验结果进行了验证，吻合良好。