基于多层高克重四轴向碳纤维拉挤复合材料性能的研究
Study on Properties of Multilayer High-Gram Four-Axial Carbon Fiber Pultrusion Composites

本文以多层高克重四轴向碳纤维布为增强材料，改性环氧树脂(陶氏)为基体树脂，采用拉挤成型技术制备了较长(10米)异型碳纤维复合材料；对异型件不同部位厚度碳纤维复合材料力学性能进行了检测，对不同部位厚度型材的力学性能的变化进行了分析；研究了树脂粘度对拉挤工艺的影响，确认了环境温度为33℃时，拉挤异型碳纤维结构件树脂的最佳粘度：560 mPa？s；并通过超声相控阵研究了10米结构件内部缺陷，研究表明，10米结构件内部缺陷满足复合材料GJB2895中3.7条内部质量的A级使用要求。
Long (10 m) shaped carbon fiber composites were prepared by pultrusion with multi-layer high gram weight four axial carbon fiber cloth as reinforcement and modified epoxy resin (Dow) as matrix resin. The mechanical properties of carbon fiber composites with different thicknesses at different parts of profiled parts were tested, and the changes of mechanical properties of profiled parts with different thicknesses were analyzed; The effect of resin viscosity on the pultrusion process was studied. It was confirmed that the optimum viscosity of pultruded carbon fiber structural parts was 560 MPa？s when the ambient temperature was 33？C; The internal defects of 10m structural parts are studied by ultrasonic phased array. The results show that the internal defects of 10m structural parts meet the Class A requirements of 3.7 internal quality in composite material GJB 2895.