缠绕张力对T800级碳纤维力学性能转化率的影响
Effect of winding tension on conversion rate for mechanical property of T800 grade carbon fiber
吴俊勇 1顾轶卓 1杨中甲 2刘新宇 1曾慧 3王绍凯 4李敏4
作者信息
- 1. 北京航空航天大学 前沿科学技术创新研究院,北京 100191
- 2. 北京航空航天大学 化学学院,北京 100191;四川玄武岩纤维新材料研究院(创新中心),广安 611138
- 3. 四川玄武岩纤维新材料研究院(创新中心),广安 611138
- 4. 北京航空航天大学 材料科学与工程学院,北京 100191
- 折叠
摘要
为探究碳纤维在缠绕工艺中纤维性能转化率的影响因素,对3种T800级碳纤维进行了 NOL环性能测试,研究了缠绕张力对环氧树脂基复合材料力学性能及纤维性能转化率的影响,进一步测试了缠绕损伤纤维的力学性能及微结构参数.结果表明:缠绕张力变化引起了 NOL环纤维含量、孔隙率、拉伸性能及破坏模式的变化;采用X射线衍射、拉曼光谱、小角X射线散射表征了纤维的结晶结构、石墨结构完整程度及微观缺陷,发现缠绕损伤纤维微晶结构参数未发生明显变化,故纤维拉伸模量下降较少;张力增大,损伤纤维孔洞缺陷增多,导致纤维和复合材料拉伸强度下降;进口纤维较国产纤维有更高的性能转化率,在相同张力水平下纤维损伤较小.
Abstract
In order to explore the influencing factors of conversion rate for mechanical property of carbon fiber using winding process,NOL ring properties with three kinds of T800 grade carbon fibers were tested.The effects of winding tension on the mechanical properties of epoxy resin matrix composites and conversion rate of fiber were studied.Moreover,mechanical property and microstructure parameters of damaged fibers after winding process were measured.The results show that winding tension changes fiber content,porosity,tensile property and failure mode of NOL ring.Crystalline structure,completeness of graphite structure and micro-defect of carbon fiber were characterized by means of X-ray diffraction,Raman spectrum and small angle X-ray scattering.The results demon-strate that the microcrystalline structure parameters of the damaged fibers don't change significantly,so the tensile modulus of the damaged fibers decreases negligibly.Pore defect of the damaged fibers increases with increasing tension,resulting in the decreases of tensile strength for fiber and the composite.The conversion rate of imported fiber is higher than those of domestic fibers,and the damage of fiber is weaker under the same tension level.
关键词
碳纤维/环氧树脂基复合材料/缠绕成型/NOL环/微结构Key words
carbon fiber/epoxy resin matrix composite/winding molding/NOL ring/microstructure引用本文复制引用
出版年
2025
NETL
NSTL
万方数据