Matsui Takayoshi, Matsushita Yoshiyuki, Matsumoto Yukihiro
Department of Architecture and Civil Engineering, Toyohashi University of Technology, Aichi, Toyohashi 441-8580, Japan.
IO INDUSTRY CO., Ltd., Kosai, Shizuoka 431-0302, Japan.
Materials (Basel). 2020 Dec 22;14(1):7. doi: 10.3390/ma14010007.
In recent years, the application of fiber-reinforced plastics (FRPs) as structural members has been promoted. Metallic bolts and rivets are often used for the connection of FRP structures, but there are some problems caused by corrosion and stress concentration at the bearing position. Fiber-reinforced thermoplastics (FRTPs) have attracted attention in composite material fields because they can be remolded by heating and manufactured with excellent speed compared with thermosetting plastics. In this paper, we propose and evaluate the connection method using rivets produced of FRTPs for FRP members. It was confirmed through material tests that an FRTP rivet provides stable tensile, shear, and bending strength. Then, it was clarified that non-clearance connection could be achieved by the proposed connection method, so initial sliding was not observed, and connection strength linearly increased as the number of FRTP rivets increased through the double-lapped tensile shear tests. Furthermore, the joint strength of the beam using FRTP rivets could be calculated with high accuracy using the method for bolt joints in steel structures through a four-point beam bending test.
近年来，纤维增强塑料（FRP）作为结构构件的应用得到了推广。金属螺栓和铆钉常用于FRP结构的连接，但在轴承位置会因腐蚀和应力集中而产生一些问题。纤维增强热塑性塑料（FRTP）在复合材料领域引起了关注，因为它们可以通过加热进行重塑，并且与热固性塑料相比，具有优异的制造速度。在本文中，我们提出并评估了使用FRTP制成的铆钉对FRP构件进行连接的方法。通过材料试验证实，FRTP铆钉具有稳定的拉伸、剪切和弯曲强度。然后，通过双搭接拉伸剪切试验表明，所提出的连接方法可以实现无间隙连接，因此未观察到初始滑动，并且随着FRTP铆钉数量的增加，连接强度呈线性增加。此外，通过四点梁弯曲试验，使用钢结构螺栓连接的方法可以高精度地计算使用FRTP铆钉的梁的接头强度。
