CAD/CAE for stress–strain properties of multifilament twisted yarns
CAD/CAE for stress–strain properties of multifilament twisted yarns
复制标题
复丝加捻纱应力应变特性的 CAD/CAE
DOI：
--
复制
发表时间：
2017
期刊：
影响因子：
--
通讯作者：
E. Bohez
中科院分区：
文献类型：
--
作者：
K. Sriprateep;E. Bohez
提出了一种模拟复丝加捻纱线拉伸行为的方法。提出了用于拉伸分析的灯丝组装模型和计算机辅助设计/计算机辅助工程（CAD/CAE）方法。考虑了加捻纱线的几何形状和非线性长丝特性。有限元法（FEM）和大变形效应被应用于应力-延伸曲线的计算。模拟了具有不同捻角的五层理想纱线结构，以预测每根长丝和每层的拉伸行为。纱线延伸后作用在长丝上的应力可以通过有限元法直接分析。长丝中的应力分布表明，最高应力区域位于纱线中心的长丝处，并向纱线表面略有下降。长丝的应力伸长被转换为纱线拉伸行为，以最大和平均应力伸长曲线显示。该预测模型的结果与高强力人造丝的应力-应变曲线和能量法进行了比较。最大应力-延伸曲线与实验结果非常吻合，并且比以前的方法获得的结果更准确。
A method is presented for modeling the tensile behavior of multifilament twisted yarns. A filament assembly model and a computer-aided design/computer-aided engineering (CAD/CAE) approach are proposed for the tensile analysis. The geometry of the twisted yarn and the nonlinear filament properties were considered. The finite element method (FEM) and large deformation effects were applied for computation of the stress–extension curves. Ideal yarn structures of five layers with different twist angles were simulated to predict the tensile behavior of each filament and each layer. The stress acting on the filaments after yarn extension could be directly analyzed by the FEM. The stress distribution in the filaments showed that the highest stress regions were located at the filament in the center of the yarn and decreased slightly to the yarn surface. The stress–extensions of the filaments were converted to yarn tensile behavior that is shown in terms of the maximum and average stress–extension curves. The results of this prediction model were compared with the stress–strain curves of high-tenacity rayon yarn and the energy method. The maximum stress–extension curves showed very good agreement with experimental results and are more accurate than those obtained by previous methods.