Abstract
CFRP (Carbon fiber reinforced plastics) have several advantages over conventional structural materials such as steel and aluminum alloy, as for instance, light-weight, high stiffness and strength and so on. But, generally speaking, CFRP laminates are said to have relatively low vibration damping. For solving this damping issue, damped CFRP laminates with damping sheets inserted at their interlamination have been proposed. If one wants to effectively utilize these kinds of CFRP technologies, precise identification of mechanical properties of CFRP lamina and damping sheet is necessary. In the present study, materials properties identification for damped CFRP laminates was conducted by combining the modal test with impulse hammering and finite element method (FEM) numerical analysis. From fitting FEM numerical results to the experimental ones for the first few modes of bending, some of the elastic and damping properties could be identified, leaving a few more unidentified materials properties which will need higher order modes.
