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) 制成的轴由于密度低、刚度高，在某些行业（例如造纸机和印刷机）成功取代了钢轴。玻璃钢轴的机械和热性能主要由纤维角度决定，从而使设计者能够控制这些性能。目前，玻璃钢轴的力传输元件由金属制成，并利用结构粘合剂或压配合进行安装。这些解决方案是不可拆卸的，并且通常占总重量的很大一部分，因此限制了玻璃钢轴在特定应用中的使用。该项目的目标是研究轻量化、优化、可拆卸的力传递元件，以使玻璃钢轴的优点为更广泛的行业所利用。电机主轴代表了需要具有可拆卸力传输的轴的示例应用。特别是机加工螺纹及其优化将成为本次调查的主题。将进行静态和疲劳强度测试，以研究旋转玻璃钢轴上的缺口效应。

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.