Technology Development for Direct Weaving of Complex 3D Nodal Structures
Technology Development for Direct Weaving of Complex 3D Nodal Structures
复制标题
复杂3D节点结构直接编织技术开发
DOI：
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发表时间：
2018
影响因子：
2.3
通讯作者：
C. Cherif
中科院分区：
文献类型：
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作者：
P. Schegner;M. Fazeli;C. Sennewald;G. Hoffmann;C. Cherif
在航空和车辆工程中，轻量化结构是节约有限能源的一个非常重要的解决方案。由于其广泛的应用，越来越有必要实现框架结构的轻量化施工概念，使得适应需求的节点结构对纤维增强塑料复合材料（FRPC）部件具有吸引力。虽然FRPC用于框架结构的使用现在已经很成熟，但是节点结构仍然主要由铝或钛制成，这导致额外的成本并且限制了可实现的质量减少。因此，必须开发FRPC节点结构的解决方案。这项工作的目的是开发和实施一种基于编织工艺的高效自动化制造技术，用于汽车和航空应用的碳纤维复杂节点结构。用于实现节点结构的编织概念的发展是基于单个子元素的碎片化。子元件实际上被展开到层中并且一个在另一个之上定位。经线浮在各个层次不接触的区域。节点结构是在传统的织机上通过将它们展平并编织成单件的多面机织物来生产的。管型材是无缝生产的，管之间的连接点是无缝的。通过拉动一个分支中的经纱穿过该结构，差距闭合并且形成3D几何形状。本出版物的主要内容是经纱的规定拉伸。这种新技术允许编织具有多方向空间分支的复杂集成节点结构，而无需后续组装要求。这些新开发的节点结构显示出巨大的潜力，轻型建筑应用。它们可以以良好的再现性和高度自动化的方式制造。这项工作的结果表明，一个巨大的潜力，编织技术的成本效益的整体设计，编织三维半成品FRPC的制造。节点结构的典型应用包括飞机中的纵梁和地板框架、机器部件、汽车框架部件，例如A柱、B柱或C柱。
Lightweight structures constitute an eminently important solution to the conservation of limited resources of energy in aeronautics and vehicle engineering. The increasing necessity to implement lightweight construction concepts for framework structures due to their vast application makes requirement-adapted node structures attractive for fiber-reinforced plastic composites (FRPC) components. Although the use of FRPC for framework structures is well-established by now, the node structures are still mostly made from aluminum or titanium, which results in additional costs and limits the achievable mass reduction. Hence solutions for FRPC node structures have to be developed. The aim of this work is the development and implementation of a productive, automated manufacturing technology based on the weaving process for complex node structures based on carbon fiber for automotive and aeronautics applications. The development of the woven concept for the realization of node structures is based on the fragmentation of the individual sub-elements. The sub-elements are virtually unwound into the layer and positioned one above the other. The warp threads are floated in the areas where the individual levels do not touch. The node structures are produced on the conventional weaving loom by flattening and weaving them as multi-surface woven fabrics in one piece. The tube profiles are produced seamlessly, and the connection points between the tubes are jointless. By pulling the warp yarns in one branch through the structure, the gap is closed and the 3D geometry is formed. The defined pulling of the warp yarns is the main component of this publication. This new technology allows for the weaving of complex, integrated node structures with multi-directional spatial branching without subsequent assembly requirements. These newly developed node structures show great potential for lightweight construction applications. They can be manufactured with good reproducibility and a high degree of automation. The results of this work indicate an enormous potential of the weaving technique for the cost effective manufacture of integrally designed, woven 3D semi-finished products for FRPC. Typical applications for node structures include stringers and floor frames in airplanes, machine components, car frame parts, such as A-, B-, or C-pillars.