Effect of radial inertia on dynamic compressive strength of cement mortar

The distributions of radial stresses induced by axial strain acceleration along the radius of solid and tubular specimens were obtained by using elasticity mechanics analysis, the radial stress distribution of the solid specimen was compared with that of the tubular one under the same conditions. Using the tubular SHPB test method, the changes of the stress distribution during dynamic compression were obtained; the relationship among the strain, strain rate and strain acceleration in the dynamic compressive damage were analyzed; the lateral confinement level during the dynamic process was estimated. The influence of the radial inertia on the dynamic compressive strength of cement mortar was analyzed by comparing the calculated with the experimented. The investigated results can provide reference for large diameter SHPB test design, data processing method and application of DIF of concrete material.