Rao Yunfei, Zhang Chen, Yi Miao
College of Textile Science and Engineering, International Institute of Silk, Zhejiang Sci-Tech University, Hangzhou 310018, China.
College of Textiles, Donghua University, Shanghai 201620, China.
Materials (Basel). 2025 Jul 3;18(13):3154. doi: 10.3390/ma18133154.
The manufacturing methodologies for carbon fiber triaxial woven fabric composites demonstrate significant variability, resulting in the failure mechanisms under tensile loading conditions, and the fundamental role of interweaving points remains unclear. Moreover, the mechanisms of destruction under tensile loads have not been sufficiently studied. In this study, the resin transfer molding and resin film infusion were selected to fabricate carbon fiber triaxial woven fabric composites, with a specific focus on their effects on the tensile properties of carbon fiber triaxial woven composites. Compared with ordinary materials, the tensile load of carbon fiber triaxial woven fabric composites after yarn spreading has increased by more than 30%. The strength can reach 1133 MPa after yarn spreading of 3k carbon fiber, which was 39% higher than the original. Furthermore, acoustic emission monitoring shows that the counts of acoustic signals in the first half dropped from 10,000 to around 3000, mostly due to the reduction of resin and fiber/matrix debonding. The digital image correlation provided full-field strain analysis, which proved that the strain of the fibers at the interweaving points decreased significantly during the stretching process after yarn spreading.
碳纤维三轴编织织物复合材料的制造方法存在显著差异，这导致了拉伸载荷条件下的失效机制，并且交织点的基本作用仍不明确。此外，拉伸载荷下的破坏机制尚未得到充分研究。在本研究中，选择树脂传递模塑和树脂膜灌注来制造碳纤维三轴编织织物复合材料，特别关注它们对碳纤维三轴编织复合材料拉伸性能的影响。与普通材料相比，碳纤维三轴编织织物复合材料在纱线铺展后的拉伸载荷增加了30%以上。3k碳纤维纱线铺展后强度可达1133MPa，比原来提高了39%。此外，声发射监测表明，前半段声信号计数从10000次降至约3000次，主要是由于树脂减少和纤维/基体脱粘。数字图像相关提供了全场应变分析，证明了纱线铺展后拉伸过程中交织点处纤维的应变显著降低。
