Damping in layered and jointed riveted structures with equal thickness

Abstract

Abstract

A common problem associated with many engineering structures is the low damping capacity making it unsuitable for use in aerospace and related structures requiring high dynamic stiffness. Attempts have been made by many researchers to design and fabricate structures, which can contribute substantial damping to the structures. One of the techniques used for this purpose is the layered structure jointed with rivets because of its superiority with respect to the requirements of high damping capacity and stiffness compared to a solid one. The presence of joints in such structures allows slip, thereby increasing the inherent damping of the structures due to interface friction. An attempt has been made in the present investigation to study, both numerically and experimentally, the damping mechanism and methodologies adopted in the structures jointed with rivets for enhancing their damping capacity. This is particularly important in applications such as bridges, pressure vessels, building, aircraft and aerospace structures, and frames and machine members, where damping capacity is of primary consideration.