Dynamic Compression Properties and Constitutive Model with Strain Rate Effect of Rubber Material

This paper presents experimental study on the quasi-static and dynamic impact response for three kinds of rubbers: carbon black rubber, silicone rubber and foam rubber by using Instron machine and SHPB device. Experimental strain rate covers a wide range from 0.002 s-1 to 15 000 s-1. The strain rate effects on mechanical properties of rubber materials are discussed. The results show that the quasi-static and dynamic engineering strain-stress curves exhibite different strain hardening forms. Under dynamic loading, the significant rate sensitivities are observed i.e. with strain rate increasing the hardening effect is enhanced. With quasi-static and high strain rate (12 000－15 000 s-1) loading, the mechanical properties of foam rubbers show typical three stages: elastic deformation, plastic deformation and collapse portion. A constitutive model with strain rate effect is presented based on Rivilin strain energy function, which shows good agreement with experimental data.