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

Tutkimustuotos

Yksityiskohdat

AlkuperäiskieliEnglanti
OtsikkoProceedings of the XII Finnish Mechanics Day
Sivut210-215
Sivumäärä6
ISBN (elektroninen)978-952-93-5609-6
TilaJulkaistu - 2015
OKM-julkaisutyyppiB3 Artikkeli konferenssijulkaisussa
TapahtumaFINNISH MECHANICS DAYS -
Kesto: 1 tammikuuta 1900 → …

Conference

ConferenceFINNISH MECHANICS DAYS
Ajanjakso1/01/00 → …

Tiivistelmä

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.

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