LATERAL CONFINEMENT EFFECT IN SHPB TEST OF THE SAP CONCRETE MATERIAL

Zhenqun Sang, Zhiping Deng, Jianglin Xi, Huibin Yao, Jiang Wu
2018 Bull., Series B   unpublished
The lateral inertia confinement effect and end face friction effect in Split Hopkinson Pressure Bar (SHPB) test of the Super Absorbent Polymers (SAP) concrete has been numerically studied based on the platform of ABAQUS. The numerical calculation of the lateral confinement effect in SHPB test for this SAP concrete revealed that lateral inertia confinement effect and end face friction effect both increase with the increase of the strain rate and decrease with the increase of porosity. At the
more » ... orosity. At the same time, the reconstructed compressive strength just induced by lateral inertia confinement and end face friction effect can be obtained based on the numerical method, which lead to departure of the strain-rate effect of the material itself from the SHPB test.
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