Dependence of Dynamic Properties of Rubber Vibration-Absorber on Initial Strain

Abstract

The vibration test of the rubber samples is performed with a forced resonance vibrator. The sample is circular cylinder (10φ×60), both edge planes of which are cemented to the platens. The variations of dynamic modulus E_d (appearent value) and internal friction ηω with the initial strain (0∼30% in tension side) are investigated under constant temperature, frequency and impressed force. The following results are obtained. 1. Both E_d and ηω decrease with the increase of initial strain. 2. However, the ratio ηω/E_d remains unaffected with the change in initial strain. 3. The ratio of the static modulus to E_d is independent of the initial strain. 4. The larger the stiffness of the sample, the larger the rate of the decrease of E_d to the increase of initial strain.