Nikolić Ružica R, Djoković Jelena M, Hadzima Branislav, Ulewicz Robert
Research Center; University of Žilina, 010 26 Žilina, Slovakia.
Department for Chemistry and Chemical Technology, Technical Faculty in Bor, University of Belgrade, 19210 Bor, Serbia.
Materials (Basel). 2020 Jul 3;13(13):2976. doi: 10.3390/ma13132976.
In the automotive industry, spot-welding is the most common method of joining components. Thus, determining the service life of spot-welds is of great importance in designing assemblies or structures. It is well-known that lately there has been a trend in the industry toward reducing the fuel consumption and harmful gasses emissions, as well as the weight of structures with the application of the lightweight materials, like aluminum alloys. In this paper, research is presented on the behavior of a spot-weld between the plates made of the two dissimilar materials-aluminum alloy and steel. In addition, the influence of the plates' thickness and the weld nugget's diameter on welds' service life is presented. In this analysis, a concept of the interface crack between the two linear elastic materials was applied. Obtained results show that the plates' thickness and the nugget's size, as well as the working load, impose significant influences on the service life of a spot-weld between the two dissimilar materials.
在汽车工业中，点焊是连接部件最常用的方法。因此，确定点焊的使用寿命对于设计组件或结构至关重要。众所周知，最近该行业出现了一种趋势，即通过应用铝合金等轻质材料来降低燃油消耗和有害气体排放，以及减轻结构重量。本文介绍了对由铝合金和钢这两种不同材料制成的板材之间点焊行为的研究。此外，还介绍了板材厚度和焊核直径对焊缝使用寿命的影响。在该分析中，应用了两种线弹性材料之间界面裂纹的概念。所得结果表明，板材厚度、焊核尺寸以及工作载荷对两种不同材料之间点焊的使用寿命有重大影响。
