Effect of preformed angle on the stress distributed in adhesively bonded aluminum single lap joint

When the preformed angle of the lap zone was varied, the stresses distribution in mid-bondline, interface near adherend as well as in adhesive adjacent to the interface of the single-lap joint formed from epoxy adhesive and aluminum alloy adherend was investigated using elastic-plastic finite element method (FEM). The results from the numerical simulation showed that all the peak stresses in the mid-bondline decreased first and then increased again as the preformed increasing. The lowest value occurred when the preformed angle was in the extent of 80 to 100meanwhile the stress distributed more even in all kinds of stresses along the lap zone. It may be a suitable value when take the preformed angle as 100 for single lap joint.