In this study, the enhancement of the failure loads of adhesive double-strap joints improved by nano-silica added in different concentrations is investigated. An epoxy-based structural adhesive, Araldite 2011, improved by silica nanoparticles through a course of actions, is utilized to attach aluminum adherend. Nano-silica in different concentrations is added to the adhesive so as to find the optimum weight percentage and to provide a comparison with previous studies. Manufactured specimens are tested under tensile loading in order to find the failure load of the joints. Afterward, images taken by scanning electron microscope are utilized to survey the quality of nanoparticles dispersion as well as the cause of the augmentation in the failure load. The results reveal a maximum enhancement of 21% in the failure load when the weight percentage of the nano-silica is 2 wt%. In addition, the postponement of the crack propagation is found out as a key factor in improving the failure load.

在这项研究中，研究了通过添加不同浓度的纳米二氧化硅来改善胶粘剂双带接头的破坏载荷。环氧纳米结构粘合剂Araldite 2011（通过二氧化硅纳米粒子通过一系列操作改进）用于附着铝粘附体。将不同浓度的纳米二氧化硅添加到粘合剂中，以便找到最佳的重量百分比，并与以前的研究进行比较。制造的试样在拉伸载荷下进行测试，以找出接头的破坏载荷。之后，利用扫描电子显微镜拍摄的图像来调查纳米粒子分散的质量以及失效载荷增加的原因。结果表明，当纳米二氧化硅的重量百分比为2wt％时，失效载荷最大增加21％。另外，发现裂纹扩展的延迟是改善破坏载荷的关键因素。