Abstract Adhesively bonded joints are frequently used in the aviation and automotive industries. Bending appears in the bonded materials as a result of eccentric loading when tensile loading is applied to an adhesively bonded single-lap joint (SLJ) geometry. As a result of this bending, moment effect occurs in the overlap region in the joints joined with the adhesive. This moment effect causes peel stresses at the edges of the overlap region of the joint such that these stresses are the main reasons of the damage in the joint. Obviously, reductions in these stresses should result in higher joint strength and increased load capacity. In this study, support patches were added at a varying distances from the overlap region to decrease the bending effect occurring in adhesively bonded single-lap joints. In the study, adhesive bonded single-lap joints were produced by using DP460 liquid structural epoxy as the adhesive, AA2024-T3 aluminum alloy as the adherend and flat or curved AA2024-T3 aluminum alloy and AISI 304 steel with different thickness as the support patches. As a result, when the failure load obtained from the experiments was examined, the use of support patches in single-lap joints increased the damage load of the joint between approximately 16% and 94%. However, such increases in the damage load are highly dependent on the type, thickness, geometry (flat or curved) and positioning of the support patches.

中文翻译：

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胶粘单搭接接头不同支撑补片的断裂载荷分析

摘要 粘接接头经常用于航空和汽车工业。当拉伸载荷施加到粘合粘合的单搭接接头 (SLJ) 几何结构时，由于偏心载荷，粘合材料中会出现弯曲。由于这种弯曲，在用粘合剂连接的接头的重叠区域中会出现力矩效应。这种力矩效应会在接头重叠区域的边缘产生剥离应力，因此这些应力是接头损坏的主要原因。显然，这些应力的降低会导致更高的接头强度和更高的负载能力。在这项研究中，在距重叠区域不同距离处添加支撑补片，以减少胶粘单搭接接头中发生的弯曲效应。在研究中，以DP460液态结构环氧树脂为胶粘剂，AA2024-T3铝合金为被粘物，AA2024-T3铝合金和AISI 304钢为不同厚度的平面或曲面支撑贴片，制作了胶粘单搭接接头。结果，当检查从实验中获得的破坏载荷时，在单搭接接头中使用支撑补片使接头的损坏载荷增加了大约 16% 到 94%。然而，损伤载荷的这种增加高度依赖于支撑片的类型、厚度、几何形状（平面或弯曲）和定位。当检查从实验中获得的破坏载荷时，在单搭接接头中使用支撑补片使接头的损坏载荷增加了大约 16% 到 94%。然而，损伤载荷的这种增加高度依赖于支撑片的类型、厚度、几何形状（平面或弯曲）和定位。当检查从实验中获得的破坏载荷时，在单搭接接头中使用支撑补片使接头的损坏载荷增加了大约 16% 到 94%。然而，损伤载荷的这种增加高度依赖于支撑片的类型、厚度、几何形状（平面或弯曲）和定位。