Investigation of innovative, high-strength threads in fiber reinforced plastic shafts and their notch-effect under rotating bending stress

纤维增强塑料（frp）制成的轴，由于其低密度和高刚度，在某些工业中成功地取代了钢轴，例如在造纸和印刷机中。frp轴的机械和热性能主要由纤维角度决定，因此设计师可以控制这些性能。目前frp轴的力传递元件由金属制成，并使用结构粘合剂或压合件进行安装。这些解决方案是不可拆卸的，通常占总重量的很大一部分，因此限制了玻璃钢轴的使用。该项目的目标是研究轻量化优化，可拆卸的力传递元件，以使frp轴的优势可用于更广泛的行业。电机主轴是需要可拆卸力传输轴的一个示例应用。特别是加工螺纹及其优化将是本研究的主题。将进行静态和疲劳强度测试，以研究缺口对旋转玻璃钢轴的影响。

Shafts made of fiber reinforced plastics (frp) have, due to their low density and high stiffness, suc-cessfully replaced steel shafts in certain industries, for example in paper and printing machines. The mechanical and thermal properties of frp shafts are predominantly determined by the fiber angle, thus giving the designer control over those properties. Currently force transmission elements for frp shafts are made of metal and are fitted utilizing struc-tural adhesives or press fits. These solutions are undetachable and often contribute a significant proportion of the overall weight, thus limiting the use of frp shafts to specific applications. Goal of this project is to investigate lightweight optimized, detachable force transmission elements, in order to make the advantages of frp shafts accessible for a wider range of industries. Motor spindles represent an example application where shafts with detachable force transmissions are needed. Especially machined threads and their optimization will be subject of this investigation. There will be static as well as fatigue strength testing to investigate the notch effect on rotating frp shafts.