Studium vlivu adherentů na pevnost lepeného spoje pro konstrukci elektromobilů

Abstract

This dissertation thesis aims to study the influence of adherends on the strength of the bonded joints. The goal was to evaluate how laser surface treatment, laser shock peening, dimensions of the bonded area, adhesive thickness, and adherends thickness affect the maximum force the bonded joint can withstand. The experimental measurement showed that the biggest strength of the bonded joints for aluminium alloy EN AW 5754 was achieved with an average surface roughness of 2.62 µm. The different average surface roughness led to a decrease in the maximal force. Similar behaviour was achieved for adhesive thickness. Lower or higher thickness in comparison with the producer-advised thickness of 0.3 mm led to the same percentage decrease of the maximal force. The results show that increasing the stiffness of the adherends, mainly the shear stress of the joint can be achieved. This fact increases the force the bonded joint can withstand without failure. Simulations were carried out for the single lap joints and the material model of the adhesive was debugged. The results of the simulations correlated with the physical tests.