【2017-1000】GFRP管-铝合金管纤维缠绕齿连接接头拉伸试验

《复合材料学报》优先在线发表论文。

摘要：为了实现复合材料-铝合金连接，提出了一种新型GFRP管-铝合金管纤维缠绕齿连接接头，对2组GFRP管-铝合金管缠绕齿连接接头试件进行了拉伸试验，观察了试件的受力方钉文库过程和破坏形态，获得了荷载-位移曲线和荷载-轴向应变曲线，同时利用有限元模型分析了GFRP管-铝合金管缠绕齿连接接头拉伸作用下的破坏机制。结果表明：接头试件的破坏模式为GFRP管齿的逐齿剪切破坏，破坏方钉文库过程表现出延性特征并产生较大的轴向位移，试件对应GFRP管的平均极限拉应力为213.22MPa；接头依靠齿的层间抗剪传递轴力，GFRP管齿是接头受力的薄弱部位，且各齿承受不均的荷载分配；齿的破坏始于齿方钉文库根的角点处。

关键词：复合材料-铝合金连接；纤维缠绕；齿连接；破坏模式；破坏机制

Abstract:In order to obtain a new way of connection between c方钉文库omposite material and aluminum-alloy, the tooth connection between GFRP tube and aluminum-alloy tube方钉文库 with filament winding was proposed. The tensile experiments on two-group specimens of the tooth con方钉文库nect between GFRP tube and aluminum-alloy tubes were conducted. The failure model, load-displacement方钉文库 relationship and load- axial strain relationship were documented during the loading process. The fa方钉文库ilure mechanism of the tooth connection between GFRP tube and aluminum-alloy tube subject to tension方钉文库 was numerically explored. The results showed that the failure model for specimen of the connection 方钉文库was one-by-one shear failure of GFRP tube teeth, the failure process appeared the ductility feature 方钉文库and larger axial displacement, and the average ultimate tensile stress of GFRP tube was 213.22MPa; t方钉文库he connection carried the axial force through interlaminar shear of the teeth, the teeth of GFRP tub方钉文库e was the weak part when the connection was stressed; and different teeth endured different load dis方钉文库tribution; the failure of teeth originated from the angular point of the root of teeth.