Abstract
In this paper, the effects of the thicknesses of adherend and adhesive layer on plastic forming of adhesively bonded sheet metals were investigated by experiments and the corresponding numerical simulation. The adhesive employed in the present work was acrylic adhesive Af-372-20 Hardrock (Denki Kagaku Kogyo, Co., Ltd.). In order to investigate the effect of the adherend thickness, an aluminium alloy sheets A5052P of thickness 0.8 mm, 1.2 mm and 1.6 mm were used for adherends. Furthermore, for the investigation on the effect of the adhesive layer, an aluminium alloy sheet A5083P-0 of 1.0 mm thick was used for adherend. The V-bending experiment (three point bending) was conducted at 23℃, where the punch speed was 1 mm/min and punch travel was 8 mm for all the testings. The main results obtained are as follows: 1) when the thickness of the adherends increases. The gull-wing bend and the shear strain become larger, which in some cases causes the delamination; 2) when the thickness of adhesive layer increases, the gull-wing bend is becomes larger, but the shear strain becomes smaller.
