Fretting Fatigue Performance of Laminated, Pin-loaded Carbon Fiber Reinforced Polymer Straps

碳纤维增强聚合物（CFRPs）是一种复合材料，生产成本很高。然而，它们通常用于需要高强度重量比和刚度的地方，如航空航天，汽车和土木工程以及越来越多的其他应用。使用和第一个适用frp追溯到1967年，在那里他们被用作滚轴叶片安装在直升机Bölkow （Bo 209 Monsun）在德国。从那时起，它们在帆船工业（索具系统）以及结构工程（塔式起重机，电梯等）中的应用得到了扩展。叠层CFRP拉伸带承受高强度疲劳载荷，值得进一步探讨的是其在这种载荷下的性能。在瑞士Empa进行的研究中使用了这种带，以检查针加载带[2]的微动疲劳行为。这一研究将对桥梁吊杆用CFRP受拉构件产生重大影响。这项研究主要集中在引脚加载带[4]，[5]上，他们的研究结果是更好地理解和进一步改进它们的疲劳性能和行为。还需要确定残余性能和表征微动疲劳行为的成分，如温度变化、磨损行为和位移/时间。该研究是实验和数值分析的结合，因为将进行实验和数值分析将验证它们和反向。

Carbon Fibre-Reinforced Polymers (CFRPs) are composite materials and can be expensive toproduce. Nevertheless, they are commonly used wherever high strength-to-weight ratio and rigidity are required like aerospace [1], automotive and civil engineering and a rising number of other applications. The use and the first applicable FRPs date back in 1967, where they were used as roler blade mountings in helicopters by Bölkow (Bo 209 Monsun) in Germany. Since then their use was extended in the sailing industry (rigging system) as well as the structural engineering (tower cranes, elevators, etc.). Laminated CFRP tensile straps undergo high tensile fatigue loads and what is worth further explore is their behaviour under such loads. These kind of straps were used in the study conducted at Empa, Switzerland in order to examine the fretting fatigue behaviour of pin-loaded straps [2]. This kind of research will have tremendous impact for CFRP tensile members used as suspenders for bridges [3].This research is mostly focused on pin-loaded straps [4], [5] and the outcome of their investigation is the better understanding and further improvement of their fatigue performance and behaviour. What is also expected is to determine the residual properties and the components that characterize the fretting fatigue behaviour, such as temperature progress, wear behaviour and displacement/time. The study is a combination of experiments and numerical analyses, as experiments will be carried out and numerical analyses will verify them and backwards.