FibreCast - material singularities and multidimensional connections in FFRP (filled fibre reinfoced polymer)

该项目的目的是继续对一种新型的、可拆卸和不可拆卸的技术进行一般性研究，用于由FRP空心型材或木杆制成的细长杆结构的高效连接。一个重要的创新将是首次对填充纤维增强聚合物（FFRP）制成的铸造连接接头进行全面研究。申请人之前的研究结果表明，铸造FFRP接头的性能足够大，可以产生与连接的FRP或木材构件具有相同承载能力的连接区域。由于采用冷铸技术，FFRP可以直接与木材或纤维增强塑料连接。这些积极的材料特性，以及FFRP的自由成型性，使高效，但仍然没有充分研究的连接概念。目前的研究主要集中在几何复杂度较低的节点和旋转对称或平面连接的节点上，为了充分发挥FFRP节点的巨大潜力，还需要进一步的深入研究。本申请的主题包括FFRP材料研究的继续和连接区域微增强的新概念的进一步发展，以及通过热处理工艺优化FFRP机械性能。这项工作将与FFRP空间形式闭合的钢筋可拆卸连接节点的原型开发相结合。为此，在以前的研究项目中开发的计算机辅助工具环境和制造过程将被利用和扩展。鉴于FFRP连接技术也承诺不可拆卸的杆连接的优点，调查领域也将扩展到不可拆卸的，几何形状复杂的三维节点。材料合适的压实连接几何形状的调查应显着增加的connections.Previous研究的鲁棒性强调了制造公差的形式拟合FFRP化合物的承载能力的影响的基础研究的必要性。因此，拟议的项目将为非接触式测量提供新的可能性，以确定FFRP节点的制造公差，并随后控制或减少它们。目前的应用建立在迄今为止进行的研究基础上。该项目将继续研究建筑中基于纤维的细长梁单元的新型FFRP连接技术领域的基本问题。

The aim of the projekt is to continue generic research into a novel, detachable and non-detachable technology for highly efficient connections in slender bar structures made of FRP hollow sections or wooden bars. An important innovation will be the first-ever comprehensive research on cast connection joints made of filled fibre-reinforced polymer (FFRP).The previous research results of the applicants demonstrated that the performance of cast FFRP joints is large enough to generate connection areas with the same load bearing capacity as the connected FRP or timber components. Due to the cold casting technique, it is possible to connect FFRP directly with timber or fibre-reinforced plastics. These positive material properties, and the free formability of FFRP, enable highly efficient, though still insufficiently researched connection concepts. Current research focusses on nodes with geometrically low complexity and a rotationally symmetric or planar connection geometry.In order to exploit the enormous potential of FFRP joints, further in-depth research is required. The subject of this application includes the continuation of FFRP material investigations and the further development of novel concepts for micro-reinforcement in the connection area as well as the optimization of FFRP mechanical properties by heat treatment processes. This work will be combined with the continuation of the prototypical development of reinforced, detachable connection nodes with spatial form closure from FFRP. For this purpose, the computer-aided tool environment and manufacturing processes developed in the previous research project will be utilized and expanded.Given FFRP joint technology also promises advantages for non-detachable bar connections, the field of investigation will also be extended into non-detachable, geometrically complex three-dimensional nodes. The investigation into material-suitably compacted connection geometries should significantly increase the robustness of the connections.Previous research has highlighted the need for a fundamental study of the influence of manufacturing tolerances on the load-bearing capacity of form-fitting FFRP compounds. The proposed project will therefore present new possibilities for non-contact measurement in order to determine the manufacturing tolerances of FFRP nodes, and subsequently control or reduce them.The present application builds on the research conducted so far. The project continues research focused on essential questions in the field of a novel FFRP connection technology for fibre-based, slender, beam elements in construction.