The aim of the present article is to compare the strength of the adhesive lap joints of the selected materials used in aviation. The joints were made in the similar and dissimilar systems with the use of three epoxy adhesives. Three different adherends were used: the EN AW-7075 aluminium alloy, the aramid-epoxy composite and the carbon-epoxy composite. Three adhesive compounds based on the Epidian 53 epoxy resin and three types of curing agents: two amine curing agents—Z1 (triethylenetetramine curing agent) and IDA, and one polyamide curing agent—PAC (polyaminoamide C) were used to make the adhesive joints. Three variants of similar joints and two variants of dissimilar joints were prepared for the tests. The shear strength was defined according to the ISO 4587 standard, with the use of Zwick/Roell 150 testing machine. In addition, the joined materials’ surface roughness was measured. Based on the strength test’s results, it was observed that the highest strength was obtained by the adhesive joints made with the Epidian 53/PAC/100:80 adhesive compound and that, in the majority of cases; similar joints show higher strength.

中文翻译：

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金属合金/聚合物复合材料的相似和相异体系的粘接接头强度比较

本文的目的是比较航空中所选材料的搭接搭接接头的强度。接头是使用三种环氧粘合剂在相似和不相似的系统中制成的。使用了三种不同的被粘物：EN AW-7075铝合金，芳族聚酰胺-环氧复合材料和碳-环氧复合材料。三种基于Epidian 53环氧树脂的粘合剂化合物和三种类型的固化剂：两种胺固化剂Z1（三亚乙基四胺固化剂）和IDA，以及一种聚酰胺固化剂PAC（聚氨基酰胺C）用于制作粘合剂接头。准备了类似关节的三个变体和不相似关节的两个变体进行测试。剪切强度是根据ISO 4587标准使用Zwick / Roell 150试验机定义的。此外，测量接合材料的表面粗糙度。根据强度测试的结果，可以发现，使用Epidian 53 / PAC / 100：80胶粘剂化合物制成的胶粘接头可获得最高的强度，并且在大多数情况下是这样；相似的接头显示出更高的强度。