The use of adhesive joints is now widely accepted as a good solution for assembling primary structures of both metallic and non-metallic materials. Hence, analyzing adhesively-bonded assemblies under combined loads is a critical aspect of the industry. Adhesively bonded joint, the joining of different materials using a polymer as adhesive, adds to the mentioned requirements more parameters, such as surface roughness, adhesive thickness, and different types of contributions to adhesively bonded joint strength. This work has the purpose of presenting a mechanical behavior characterization of adhesive-bonded joints, concerning their average stress at rupture. A modified Arcan device was used to obtain the average stress at rupture under different angles or loading conditions, such as pure shear 90° , pure tensile strength 0° , and combined conditions. The experimental results were applied to a theoretical model, which takes into consideration the hydrostatic contribution to the mechanical behavior, called Drucker-Prager Model, which was initially developed to characterize soils.