粘弾性材料の力学モデル構築におけるひずみ振幅の影響

抄録

This paper studies the dynamic characteristics of a viscoelastic material experimentally and the construction of equivalent stiffness models for the material numerically. For this purpose, the vibration tests for the viscoelastic material are carried out under the different strain amplitudes in vibration, and the master curve, which indicates the dynamic characteristics of the material for wider range of frequency, is obtained numerically by applying the W.L.F. rule. Fractional derivative models for the stress-strain relationship are then assumed for the material, and the parameters of the model are identified for each master curve, respectively. In minimizing the sum of differences between master curve’s values and the estimated values given by the assumed model is minimized numerically by using the Solver Procedure of the Microsoft EXCEL in the present study. Finally, the applicability of the fractional derivative models is discussed by comparing the numerical results.