Amino-silane coupling agents are used to improve adhesion to polyamide-based composites. This paper aims to study the influence of polyamide 6 moisture content on the interfacial strength between the polyamide and amino-silane-coated aluminum. A coupled experimental and simulative approach is applied that enables the interfacial strength to be taken separately from the moisture-dependent mechanical behavior of polyamide 6. Lap joints of polyamide 6 and aluminum, functionalized by 3-(2-aminoethylamino)propyl trimethoxy silane, are tested at three different polyamide moisture conditions. Afterwards, numerical simulations of the lap shear experiments are carried out to identify the parameters for a mechanical model of the interface. Subsequently, the dependence of polymer's properties on the moisture content is investigated by different sets of parameters of an applied inelastic material model. Finally, an analysis of the interfacial parameters proves and characterizes the dependence of the joint strength on polyamide moisture content. It is found that the lower the moisture content of the polyamide, the higher the interfacial strength.

氨基硅烷偶联剂用于提高对聚酰胺基复合材料的附着力。本文旨在研究聚酰胺6水分含量对聚酰胺与氨基硅烷包覆铝的界面强度的影响。应用了一种耦合的实验和模拟方法，使界面强度能够与聚酰胺 6 的湿度相关机械行为分开。 聚酰胺 6 和铝的搭接接头，由 3-（2-氨基乙基氨基）丙基三甲氧基硅烷功能化，是在三种不同的聚酰胺湿度条件下进行测试。然后，进行搭接剪切实验的数值模拟，以确定界面力学模型的参数。随后，聚合物的依赖性 通过应用非弹性材料模型的不同参数集来研究水分含量的特性。最后，界面参数的分析证明并表征了接头强度对聚酰胺水分含量的依赖性。发现聚酰胺的含水量越低，界面强度越高。