碳纤维复合材料板与钢板胶-螺混合双搭接接头拉伸性能试验研究

对双层搭接的碳纤维复合材料板与钢板胶-螺混合连接在单调受拉伸荷载下的拉伸性能展开试验研究;考察其极限承载力、应变分布以及破坏模式;并与螺栓连接、纯胶连接方式比较;同时还考虑制作工艺对混合连接的影响。结果表明,混合连接承载力稳定。两种工艺制作的固定尺寸的混合节点中,先胶结再钻孔的节点在一定数量范围内增加螺栓数会使承载力上升,但过多使用螺栓承载力反而下降;先钻孔再涂胶的节点螺栓和胶层协同工作性能好,但制作工艺要求更高。

EXPERIMENTAL STUDY ON TENSILE BEHAVIORS OF HYBRID CFRP-STEE DOUBLE-LAP JOINTS USING BOLTS AND ADHESIVE

Tensile behavior of hybrid CFRP-steel double-lap joints using adhesive and bolts was studied through monotonic loading to failure. Their ultimate bearing capacity,strain distribution and failure modes were investigated with comparison to the joints with bolts and adhesive. Meanwhile,influences of fabrication processes were also studied. The results show that hybrid joints have a relatively stable bearing capacity. With regard to fabrication methods,it was found that for specimens which are bonded before being drilled and bolted,more bolts can lead higher bearing capacity to some extent. But too many bolts result in less loading bearing capacity. Specimens that were drilled before bonding and bolting can work together very well. Which requires strict fabrication process.