论文部分内容阅读
通过对3种不同针织方式碳纤维经编织物结构的分析和弯曲性能测试,研究了织物针织方式对NCFs复合材料力学性能的影响。采用链式缝编的[45°/-45°]织物与经平缝编的[0°/90°]织物相比,束缚效果更好,经编线引起的纤维变形区的宽度较小,因此[45°/-45°]织物增强的复合材料中的富树脂区和空洞相对较少,弯曲强度和模量均高于[0°/90°]复合材料。单向经编织物也采用经平缝编,纤维取向与双轴向织物相比更准确,由于缝编引起的纤维变形和损伤较少,复合材料的弯曲性能高于两种双轴向经编材料。
Through the analysis of three different knitted carbon fiber warp knit fabric structure and the bending performance test, the influence of fabric knitting method on the mechanical properties of NCFs composites was studied. [45 ° / -45 °] fabrics using chain stitching have a better restraint effect than warp stitch [0 ° / 90 °] fabrics, a smaller width of warp caused by warp knitting yarn, Thus, the relatively resin-rich regions and voids in the [45 ° / -45 °] fabric-reinforced composites are relatively small, with flexural strength and modulus higher than that of the [0 ° / 90 °] composite. Unidirectional warp knit fabrics are also stitched, the orientation of the fibers is more accurate than the biaxial fabrics, the flexural properties of the composites are higher than those of the two biaxial warp knit fabrics due to less fiber deformation and damage caused by stitchbonding material.