3D机织预制体准纤维尺度建模方法
Quasi-fiber scale modelling of 3D woven preforms
朱琬清 1谢军波 1吴兰芳 2陈利 1杨林 1刘静妍1
作者信息
- 1. 天津工业大学 复合材料研究院,纺织复合材料教育部重点实验室,天津 300387;天津工业大学纺织科学与工程学院,天津 300387
- 2. 中国运载火箭技术研究院物流中心,北京 100076
- 折叠
摘要
3D机织复合材料在航空航天领域有着广泛应用,作为复合材料的增强结构,纤维预制体的几何构造对复合材料的力学性能有着决定性影响.但预制体是一种柔性结构,在成型过程中容易发生显著的几何结构变异,包括纱线路径的变化和截面的挤压变形.实现预制体的精细化、高保真度建模是对复合材料进行性能预测和结构设计的重要前提.针对碳纤维 3D机织预制体的复杂纤维结构,基于虚拟纤维的概念提出了准纤维尺度建模方法,模拟了织造过程中纱线的运动和变形,实现了预制体的精确重构.利用Micro-CT技术表征了预制体样件的内部单胞结构,验证了模型的可靠性.
Abstract
3D woven composites are widely used in the aerospace field.As a reinforcement structure,the geometry of fiber preform has a decisive influence on the mechanical properties of composites.However,a preform is a flex-ible structure that is prone to significant geometric variation during the molding process,including yarn path changes and compressive deformations of cross-sections.Achieving refined and high-fidelity modeling of preforms is an important prerequisite for performance prediction and structural design of composite materials.Aiming at modeling of the complex fiber structure for carbon fiber 3D woven preforms,a quasi-fiber scale modeling method based on the concept of virtual fiber was proposed.Movements and deformations of yarn in the weaving process were simulated,and high precision model of 3D woven preform was constructed.The Micro-CT technology was used to analyze the unit cell structure inside the preform sample,which verified the reliability of the model.
关键词
3D机织预制体/虚拟纤维/机织复合材料/Micro-CT技术/纤维结构/建模Key words
3D woven preform/virtual fiber/woven composites/Micro-CT technology/fiber structure/model-ling引用本文复制引用
基金项目
国家科技重大专项(Y2019-I-0018-0017)
天津市海河实验室科学研究项目(22HHXCJC00007)
出版年
2024
NETL
NSTL
万方数据