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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;齿的破坏始于齿根的角点处。
In order to achieve the composite - aluminum alloy connection, a new type of GFRP pipe - aluminum alloy tube fiber winding tooth joint was proposed. Tensile tests were carried out on two sets of GFRP pipe - aluminum alloy pipe wound tooth joint. And the load-displacement curve and load-axial strain curve were obtained. At the same time, the failure mechanism of GFRP pipe-aluminum alloy tube winding tooth joint under tension was analyzed by finite element model. The results show that the failure mode of the joint specimen is the tooth-to-tooth shear failure of the GFRP pipe teeth, the ductile process shows ductile characteristics and a large axial displacement, and the average ultimate tensile stress of the corresponding GFRP pipe is 213.22MPa. Depending on the axial shear resistance of the tooth, the GFRP tube teeth are the weakest part of the joint, and the teeth are subjected to uneven load distribution. The tooth damage begins at the corner of the tooth root.