Braided thermoplastic composite rivets for composite structures

现代飞机结构的一个重要部分是使用复合材料制造的。这些材料坚硬而坚固，同时比传统航空航天制造中常用的铝、钛或钢等金属材料更轻。复合材料部件必须使用重型钛紧固件组装，因为结构边界不能由政府当局认证。此外，钻孔精度要求比金属结构紧固高得多。本研究计画将开发一种复合材料结构用铆钉。铆钉毛坯将采用脉冲制造技术生产。纸浆必须适应先进的材料，如PEEK聚合物和编织碳纤维。利用双轴向编织物的可变形性的铆钉设置操作将

A significant part of modern aircraft structures are fabricated using composites materials. These materials are stiff and strong while being lighter than metallic materials such as aluminum, titanium or steel commonly used in traditional aerospace manufacturing. Composite material components must be assembled using heavy titanium fasteners since structural bounding is not certifiable by governmental authorities. Moreover, the drilling precision requirements are much greater than for metallic structure fastening. This research project will develop a composite rivet for composite structures. Rivet blanks will be produced using the pultrusion manufacturing technique. Pultrusion must be adapted to advanced materials such as PEEK polymers and braided carbon fibres. The rivet setting operation, taking advantage of the deformability of bi-axial braids, will