2004 Volume 47 Issue 2 Pages 157-163
The damping characteristics of an adhesively bonded beam in which two steel strips are joined by an adhesive are investigated. In particular, we focused on the effect of temperature on the damping characteristics. In the analysis, vibration modes of the bonded beam and strain energies distributed in each strip and the adhesive in motion are analyzed by the finite element method. Then the damping capacity of the bonded beam is estimated using the strain energies and damping ratios of the steel strips and the adhesive, which were obtained independently beforehand by experiments. The temperature dependence of Young's modulus, Poisson's ratio and the damping ratio of the adhesive are considered in the analysis. The estimated values of the damping capacity are in good agreement with the experimental results. Thus, the effects of temperature, vibration modes and the thickness of the adhesive layer on the damping capacity of a bonded beam are clarified.