イソブチレン・スチレン系のブロック共重合体からなる粘弾性材料の構成則 : その1 小歪領域における温度・振動数依存のモデル化

概要

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This paper proposes a constitutive rule for the viscoelastic materials combining iso-butylene and stylene polymers. The materials exhibit an elliptical hysteresis loop under small deformation, and a bi-linear hysteresis loop under large deformation. The so-called temperature-frequency equivalency principle is found applicable to this type of co-polymer, and it is utilized for efficient analytical modeling of three distinct viscoelastic materials. The constitutive rule involves fractional time-derivatives of stress and strain, and a new algorithm is proposed for numerical integration. The model shows excellent accuracy over a wide range of temperature and frequency of the sinusoidal loading, as well as random loading that simulates the effects of different earthquakes and building vibration periods.
社団法人日本建築学会の論文
2003-07-30