Compatibility and temperature effect on hybrid painted glass-aluminum bonded joints

The present work is based on an experimental campaign in which the mechanical properties of a set of adhesive painted aluminum-cloudy glass joint are investigated; the obtained results can be appropriately used for practical problems, since this particular junction is suitable in civil engineering applications. For the conducted experimental campaign, a commercial epoxy structural adhesive was selected. Since the performance of the adhesive depends on temperature, tensile test on dog bone specimens and double-lap joints were conducted at three different temperatures (representing laboratory conditions, work conditions and maximum service temperature). The work aims to verify the applicability and the compatibility of the tested junction on a building component, such as window frames, by reproducing the effective work conditions of both glass and aluminum. The obtained results show that the analyzed junction can be suitable used for practical applications up to work temperature, since a good performance in term of maximum load capacity and maximum displacement is maintained if compared with laboratory condition. Instead, a drastic reduction of mechanical properties is observed at maximum service temperature.