Abstract

Due to the complex microstructure of textile composites, the modeling of physical properties is challenging. The mechanical properties of textiles depend on different geometrical parameters such as the yarn's geometrical properties, undulation, geometrical cross-section, gap between two adjacent yarns, and other parameters. In this paper, a geometrical modeling of 2D and 3D woven composites is presented. The novelty of this paper is related to a more realistic modeling of yarn's cross-section. The presented modeling technique takes into account that yarns constituting 2D or 3D woven composite do not have the same cross-section shape and undulated part as usually considered with an ideal unit cell modeling. The proposed technique leads to calculate the fiber volume fraction of yarns, then the fiber volume fraction of the unit cell of the studied composite. It was applied to different kinds of woven composites where the modeled unit cell converged to a more realistic shape.

摘要

由于纺织品复合材料的微观结构复杂，因此物理特性的建模具有挑战性。纺织品的机械性能取决于不同的几何参数，例如纱线的几何特性，起伏，几何横截面，两条相邻纱线之间的间隙以及其他参数。在本文中，提出了2D和3D编织复合材料的几何建模。本文的新颖性与更真实的纱线横截面建模有关。提出的建模技术考虑到了构成2D或3D编织复合材料的纱线不具有通常理想单元建模所考虑的相同的横截面形状和起伏部分。所提出的技术可以计算出纱线的纤维体积分数，然后是所研究复合材料的晶胞的纤维体积分数。它被应用于不同种类的机织复合材料，其中已建模的晶胞会聚为更逼真的形状。