Abstract
Even though high damping rubber (HDR) is used in various fields such as vibration isolation and seismic isolation, few studies have been conducted to investigate thermo-mechanical behaviors. Besides, modeling on thermo-mechanical coupling is not available. This paper presents experimental investigations of temperature dependency behavior of HDR material and its thermo-mechanical constitutive modeling. The use of infrared thermographs to measure temperature field in HDR under cyclic shear is presented. Changes of mechanical properties of HDR are investigated with respect to frequency of loading and rubber body temperature. Based on the results of rubber material tests, a temperature dependent constitutive model for HDR is proposed, which combines elasto-plastic body with strain dependent isotropic hardening law and hyperelastic body with damage model. Temperature dependent parameters, which can express rate dependent hardening, yielding and thermal softening are introduced to the model. The proposed constitutive model can express both temperature dependent and frequency dependent behavior of HDR. Finally, the energy balance equation is constructed to evaluate average surface temperature of the material. The modeling results agree well with the experimental ones.
