Experimental and computational investigation of the response of an elastomer at pressures up to 18 GPa and strain rates of 105 −106 s−1

Abstract

Pressure-shear plate impact (PSPI) experiments have been conducted to study the mechanical response of an elastomer (polyurea) at high pressures and high strain rate. The previously determined isentrope has been extended to 18 GPa. At this pressure, the high-strain-rate shearing resistance of polyurea is approximately 1 GPa. From the PSPI tests, it is evident that the shearing resistance of polyurea is quite sensitive to pressure. Based on the experimental results, a quasilinear viscoelasticity model is introduced and implemented in ABAQUS to simulate the response of polyurea P1000 under the impact conditions of the various PSPI experiments. Results of these simulations are compared with the experimental results to gain insight into the viability of the proposed model.