Kałuża Marta, Hulimka Jacek, Kubica Jan, Tekieli Marcin
Department of Structural Engineering, Faculty of Civil Engineering, Silesian University of Technology, Akademicka 5 St., 44-100 Gliwice, Poland.
Institute for Computational Civil Engineering, Department of Civil Engineering, Cracow University of Technology, Warszawska 24 St., 31-155 Kraków, Poland.
Materials (Basel). 2019 Jan 1;12(1):120. doi: 10.3390/ma12010120.
In typical technical applications, steel components are usually connected by welding or with mechanical connectors. An alternative solution, typical in the aviation and automotive industry, but not widespread in engineering structures, is to join thin sheet metal using adhesives. The article presents an experimental study of adhesive joints used in overlap connections subjected to static tension. A methacrylate adhesive, selected experimentally from a range of adhesives, which combines the optimum strength and strain properties, was tested. The laboratory tests were carried out on double-lap specimens made of high-strength Domex 700 steel. On the basis of the experimental results, the behavior of the specimens and their failure mechanism, depending on the anchorage lengths used (200, 300 and 400 mm), are described. The tests confirmed the effectiveness of the selected methacrylate adhesive in a practical application. It was shown that with the appropriate anchorage length (adequate to the type of steel components and the joint geometry) between 300 and 400 mm, the capacity of the adhesive joint is higher than the capacity of a single steel component. Two types of specimen behavior were recognized: Quasi-brittle, which occurs at the anchorage length of 200 mm, and ductile, observed for 300 mm and 400 mm anchoring. In addition, thanks to the optical measurement method used, a detailed strain distribution on the specimen surface was determined. The data will be used for subsequent validation of an analytical and numerical model.
在典型的技术应用中，钢构件通常通过焊接或使用机械连接件进行连接。一种在航空和汽车工业中较为典型但在工程结构中并不普遍的替代解决方案是使用粘合剂连接薄金属板。本文介绍了在承受静态拉力的搭接连接中使用的粘合剂接头的实验研究。对从一系列粘合剂中通过实验选定的一种甲基丙烯酸酯粘合剂进行了测试，该粘合剂兼具最佳强度和应变性能。实验室测试在由高强度Domex 700钢制成的双搭接试件上进行。根据实验结果，描述了试件的行为及其失效机制，这些行为和机制取决于所使用的锚固长度（200、300和400毫米）。测试证实了所选甲基丙烯酸酯粘合剂在实际应用中的有效性。结果表明，在300至400毫米之间的适当锚固长度（适合钢构件类型和接头几何形状）下，粘合剂接头的承载能力高于单个钢构件的承载能力。识别出了两种类型的试件行为：准脆性，发生在锚固长度为200毫米时；延性，在锚固长度为300毫米和400毫米时观察到。此外，由于使用了光学测量方法，确定了试件表面详细的应变分布。这些数据将用于后续分析和数值模型的验证。
