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An experimental and numerical study of the dynamic Brazilian disc test on Kuru granite

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

Details

Original languageEnglish
Title of host publicationProceedings of the XII Finnish Mechanics Day
Pages210-215
Number of pages6
ISBN (Electronic)978-952-93-5609-6
Publication statusPublished - 2015
Publication typeB3 Non-refereed article in conference proceedings
EventFinnish Mechanics Days -
Duration: 1 Jan 1900 → …

Conference

ConferenceFinnish Mechanics Days
Period1/01/00 → …

Abstract

This paper deals with numerical modeling of the dynamic tensile strength of Kuru granite and corresponding experiments with the dynamic Brazilian Disc (BD) tests using the Split Hopkinson Pressure Bar apparatus (SHPB). It was found that the indirect tensile strength of the Kuru granite increased from the static value of 13 MPa to 36 MPa when the impact velocity reached 20 m/s. A numerical method was developed for simulations of these tests. The method includes a material model based on the rate-dependent isotropic compliance damage and embedded discontinuity concepts for rock and an FEM based explicit time marching technique for simulating the dynamics of the SHPB apparatus. Simulation results are in decent agreement with the experiments.

Keywords

  • Dynamic Brazilian Disc test, Split Hopkinson Pressure Bar, FEM, rock fracture

Publication forum classification

Field of science, Statistics Finland