Validation of a three-dimensional Finite-Discrete Element Method using experimental results of the Split Hopkinson Pressure Bar test

• Published in: International journal of rock mechanics and mining sciences (Oxford, England : 1997) Vol. 70; pp. 101 - 108
• Main Authors: Rougier, E., Knight, E.E., Broome, S.T., Sussman, A.J., Munjiza, A.
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01-09-2014; Elsevier
• Subjects: Applied sciences; Bars; Breakage; Buildings. Public works; Computer simulation; Exact sciences and technology; FDEM; Geotechnics; Granite; High strain rate; Simulation; Softening; Soil investigations. Testing; Soil mechanics. Rocks mechanics; Strength of materials (elasticity, plasticity, buckling, etc.); Structural analysis. Stresses; Three dimensional; Three dimensional models; Two dimensional; Simulation; FDEM; High strain rate; Granite; Stress analysis; High strain; Rock mechanics; Experimental device; Discrete element method; Rock mass; Modeling; Finite element method; Three dimensional model; Experimental result; Failure analysis; Hopkinson bar; Numerical simulation; Strain rate
• ISSN: 1365-1609; 1873-4545
• DOI: 10.1016/j.ijrmms.2014.03.011

A full-scale 3D analysis of a Split Hopkinson Pressure Bar experiment on granite material using a 3D combined Finite-Discrete Element Method (FDEM) is shown. Previous efforts to simulate Split Hopkinson Pressure Bar experiments using the 2D FDEM had obtained a very good match for the loading portion of the experiment. This work extends those efforts by modeling the entire 3D Split Hopkinson Pressure Bar experimental setup, and reproducing the softening behavior of the sample after breakage. This modeling effort introduces the effect of a compliant interface between the bars and the sample.
•3D analysis of Split Hopkinson Pressure Bar (SHPB) experiment on granite via FDEM.•The modeling work simulates a compliant interface between the bars and the sample.•Modeling of the entire 3D SHPB experimental setup.•Modeling of the sample׳s softening behavior after breakage.•Experimental material analyzed was weathered granite.