Investigation of the transferability of the fatigue behaviour of fibre-reinforced plastics from coupon samples to optimised higher-level components for the development of a design guideline

有效和可靠的纤维增强塑料复合材料（FRP）产品开发方法允许高度开发轻量化设计潜力，因为安全因素可以减少，因为更好地了解相互作用和影响因素分布的精确知识。在目前的研究项目中，考虑FRP在高层构件设计中的疲劳行为的方法将通过两个例子进行构思、实施和评估，这两个例子一方面考虑了优化层结构的特殊特征，另一方面考虑了材料和结构不确定性对疲劳行为的影响。该方法考虑了影响因素的分散性，使产品开发人员能够创建稳健的设计。它基于对不同测试金字塔水平的详细实验调查，从中得出确定FRP疲劳行为的合适设计极限的结论，并量化各个影响参数的发生分布。从券样开始，考虑到可能发生的任何不确定性，结果依次转移到半成品水平。进一步的重点在于力引入点的优化。综合评估后，结果将转移到软件工具中，这将增加用户对轻型FKV施工方法的接受度。最后，根据开发的方法和知识库，两个申请人将共同推导、制造和测试两个不同的演示概念。基于这些结果，将对该方法进行评估，并显示出进一步的潜力。

Effective and reliable product development methods for fibre reinforced plastic composites (FRP) allow a high degree of exploitation of lightweight design potential, as safety factors can be reduced due to a better understanding of the interactions and a precise knowledge of the distribution of influencing factors. In the present research project, a method for the consideration of the fatigue behaviour of FRP in the design of high-level components is to be conceived, implemented and evaluated on two examples, which on the one hand considers the special features of optimised layer structures and on the other hand the influence of material and structural uncertainties on the fatigue behaviour. The method considers the scatter of the influencing factors and enables the product developer to create robust designs. It is based on detailed experimental investigations on different levels of the test pyramid, from which conclusions are drawn about suitable design limits for the determination of the FRP fatigue behaviour, and also quantifies occurring distributions of individual influencing parameters. Starting with coupon samples, the results are successively transferred to the semi-finished product level, considering any uncertainties that may occur. A further focus lies on the optimisation of the force introduction points. After comprehensive evaluation, the findings will be transferred to software tools, which should increase the acceptance of lightweight FKV construction methods among users. Finally, two different demonstrator concepts will be derived, manufactured and tested jointly by the two applicants based on the developed method and knowledge base. Based on these results, the method will be evaluated and further potentials will be shown.