三维机织复合材料纱线束截面变形研究

基金项目: 天津市自然科学基金（033602611）

详细信息

Study on tow cross-ection deformation in three-imensional woven composites

摘要

摘要: 基于经典的双凸模型，采用正负预重叠法，结合可视化技术，研究了三维机织复合材料纱线截面的变形规律，提出了“凹凸交变模型”，导出了截面变形函数。研究结果表明，纱线束截面沿纱线长度方向按凹凸交变的规律呈周期性变化。这一研究成果修正了一直以来的恒定截面假设，使截面研究有了新的进展。
- 3D机织复合材料 /
- 纤维束截面变形 /
- 凹凸交变模型 /
- 体重建 /
- 正负预重叠法 /
- 有限元分析 /
- 纱态
Abstract: Based on the classical lenticular model，with a positive-negative-pre-overlap method，combined with visualization technology，the cross-section deformation rule is studied in this paper. “Concave convex alternate model” is presented and its mathematical function is deduced. The research shows that the tow‘s concave cross-section alternates with the convex one periodically in length. The classical “invariant cross-section assumption” is amended，which has dominated the academic world for many years. A breakthrough has been made in the cross-section research.
- 3D woven composites /
- tow cross-section deformation /
- concave convex alternate model (CCAM) /
- volume reconstruction /
- positive-negative-pre-overlap (PNPO) /
- finite element analysis /
- yarn pattern