Galińska Anna
Institute of Aeronautics and Applied Mechanics, Faculty of Power and Aeronautical Engineering, Warsaw University of Technology, Nowowiejska 24, 00-665 Warsaw, Poland.
Polymers (Basel). 2020 Sep 30;12(10):2252. doi: 10.3390/polym12102252.
As the fibre reinforced plastic composites gain larger and larger share in industry, the problem of joining them with metal elements becomes significant. The current paper is the first part of the literature review, which gathers and evaluates knowledge about methods suitable for mechanical joining of composite and metal elements. This paper concerns bolted joining, because this method of mechanical joining is widely used for joining composite materials. The paper describes failure modes of bolted joints in composite materials, the influence of the bolt clamping torque, the clearance between the bolt and the hole and aging on the performance of the joint, drilling techniques used in composite materials in order to minimize damages, different fastener types, inspection techniques, and finally, the techniques that have been developed in order to improve the strength of the bolted joints in composites. Since the hole drilled in a composite material in order to perform bolted joining is a weak point of the structure, those techniques: bonded inserts, titanium foil internal inserts, fibre steering, additional reinforcement, and moulded holes, mainly aim to improve the strength of the hole in the composite. The techniques have been discussed in details and compared with each other in the summary section.
随着纤维增强塑料复合材料在工业中所占份额越来越大，将它们与金属部件连接的问题变得愈发重要。本文是文献综述的第一部分，收集并评估了适用于复合材料与金属部件机械连接方法的相关知识。本文关注螺栓连接，因为这种机械连接方法在复合材料连接中被广泛应用。本文描述了复合材料中螺栓连接的失效模式、螺栓夹紧扭矩、螺栓与孔之间的间隙以及老化对接头性能的影响，介绍了用于复合材料的钻孔技术以尽量减少损伤，不同的紧固件类型、检测技术，最后还介绍了为提高复合材料螺栓连接强度而开发的技术。由于为进行螺栓连接而在复合材料中钻出的孔是结构的薄弱点，那些技术：粘结衬套、钛箔内衬套、纤维转向、额外增强和模制孔，主要旨在提高复合材料中孔的强度。在总结部分对这些技术进行了详细讨论并相互比较。
