Experimental Investigation of Fatigue Strength in Adhesive Bonds

– In this study, AISI 1040 carbon steel plate and cylindrical parts used as brackets in wind turbine towers were bonded with 3M acrylic adhesive. The static strength values (shear stress, bending stress and equivalent stress) of the adhesion bond were determined by mechanical test setup. Also; since fatigue occurs inside the tower by thermal stresses and pressures, S-N curves are obtained depending on the equivalent stress varying at R=0 stress ratio of the bonded parts under repeated stress. As a result of the experiments, it was found that the adhesion bond has an infinite life under 35 MPa fluctuating equivalent stress.