ABSTRACT
Rock dynamic damage which is important in a variety of rock mechanics and rock engineering is carried out using Split Hopkinson Pressure Bar (SHPB) technique in this study. To decouple the rate dependency and inertia effect of the material for ensuring the specimen being under a dynamic equilibrium state, several techniques (e.g. end friction eliminating, dispersion effects eliminating and damping technique) are proposed using GBDEM. Calibrations with laboratory uniaxial compression test and direct tension test were conducted to obtain proper micro-parameters. The effect of rate dependency behaved in the form of σ d = 114 e 0.0011 ε ˙ https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781351181327/d72dac68-c9c2-4f83-9ada-2424a078d94a/content/eq371.tif"/> was compared with A.H. Xahyκaeb model and Lankford model in a strain rate range from 133 /s to 1100 /s.
