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

碳纤维增强聚合物(CFRP)是一种复合材料，生产成本可能很高。然而，它们通常用于需要高强度重量比和高刚性的地方，如航空航天[1]、汽车和土木工程以及越来越多的其他应用。FRPS的使用和第一个可应用的FRPS可以追溯到1967年，当时它们被德国的Bölkow(Bo 209 Monsun)用作直升机上的滚轮叶片支架。从那时起，它们的用途被扩展到帆船工业(索具系统)以及结构工程(塔式起重机、电梯等)。层合CFRP张拉带承受较高的拉伸疲劳载荷，值得进一步探讨的是它们在这种载荷下的行为。这些皮带被用于在瑞士Empa进行的研究，以检查销负载皮带的微动疲劳行为[2]。这类研究将对作为桥梁吊索的CFRP受拉构件产生巨大的影响[3]。本文的研究主要集中在销压带[4]、[5]，他们的研究成果是对其疲劳性能和行为的更好的理解和进一步的改进。还需要确定残余性能和表征微动疲劳行为的成分，如温度进程、磨损行为和位移/时间。这项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来验证它们。

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.