具有更高耐损伤性的新型高性能/金属混杂纱线复合材料

Concepts for novel high-performance/metal hybrid yarns for composites with improved damage tolerance

德累斯顿工业大学纺织机械与高性能材料技术研究所(ITM)正在致力于由高性能纤维(如玻璃纤维)和金属纤维(如不锈钢丝)组成的新型混杂纱线的项目的研究。为提高纤维的混合度和取向度,同时减小纤维的损伤,该项目在喷气复合技术的基础上,开发出了一种新型纤维混杂工艺。基于纤维混杂和喷气复合技术的发展,项目组利用流体模拟的方法考量了不同纤维的特性,如高性能纤维的高剪切敏感性及金属纤维的高弯曲刚度和高面密度。揭示了混杂纱线在耐损伤复合材料中应用潜力。

Currently,at the ITM extensive scientific research efforts are directed towards the development of novel hybrid yarns consisting of high-performance(e.g.glass)and metal fibers(e.g.stainless steel).Based on the air-jet technology,a new manufacturing technology is generated to realize these hybrid yarns with a high degree of mixing,minimal fiber damage and high fiber orientation.For the concept development in terms of hybridization technology and air-jet,the different material properties of processed fibers,such as high shear sensitivity of high-performance fibers as well as high bending stiffness and density of metal fibers,are taken into account using flow simulations.Based on the resulting concepts,the potential of the developed yarn constructions for use in composites with improved damage tolerance is revealed.