Experimental and numerical investigation of the dynamic response of a ZrB2‐SiC ceramic under uniaxial compression

摘要

Abstract The dynamic experimental tests were performed on cylindrical zirconium diboride‐silicon carbide ceramic specimens under the uniaxial compression from 519 to 2861 s−1. The effect of the strain rate on the dynamic response of a ZrB2‐SiC ceramic was investigated using experimental and numerical methods. A significant increase on the dynamic compressive strength, elastic modulus, and the dynamic tensile strength was found with the increase of the strain rate. The damage process and fracture pattern of the ZrB2‐SiC ceramic exhibited a significant strain‐rate dependence under the dynamic compression. The strain rate‐dependent elastic modulus and tensile strength were introduced into Johnson–Holmquist (JH‐2) model to predict the dynamic compression behavior of the ZrB2‐SiC ceramic. The simulation results of the dynamic compressive strength, stress–strain relation, and fracture patterns were in good accordance with the dynamic experimental results.