Mechanical response of adhesively bonded composite joints subjected to vibration load and axial impact

摘要

In the present work, the effects of vibration and impact on the mechanical performance of adhesively bonded joint of fiber-reinforced plastic (FRP) composite structures were investigated experimentally, and the main failure modes were discussed. For this purpose, eight layered fiberglass composite plates were produced using vacuum assisted resin infusion technique. DP-460 adhesive was used for the joining of composite plates. In order to study the joint performance, the tensile test was carried out on adhesively bonded specimens subjected to vibration and impact. The changing parameters for this investigation are the number of vibration cycles and level of axial impact energy. Experimental results indicate that the vibration and impact have a great effect on joint strength. However, this effect is not always negative in contrary to the expected behavior. Certain values of impact load and vibration cycles applied to the joint improve the tensile strength of the adhesively bonded joint. This result shows a complex interaction between the composite plate and adhesive through the dynamic loading. This work provided a new approach to increase the mechanical properties of adhesively bonded joints applying the dynamic loads.