ABSTRACT
As highly dissipative and low thermal-conductive materials, rubbers may undergo high temperature rise due to mechanical energy conversion when subjected to cyclic loading, known as heat build-up. Exposed to hydrostatic stress, volume change occurs and invalidates most of incompressible assumptions. This work presents firstly comprehensive experiments to characterize mechanical properties of reinforced rubbers, especially the volume change due to hydrostatic stress. The time-dependence of bulk modulus at long term was also investigated by hydrostatic creep-recovery compression tests. A viscoelastic constitutive model will be introduced and the analytical time-dependent bulk modulus was calibrated and validated for the experimental data.
