3D DEM simulations of basic geotechnical tests with early detection of shear localization

• Autorzy: Grabowski Aleksander , Nitka Michał

Identyfikatory

DOI

10.2478/sgem-2020-0010

• Języki publikacji: EN

Abstrakty

EN

This paper deals with elementary geotechnical tests: triaxial and direct shear of cohesionless sand using the discrete element method (DEM). The capabilities of the numerical DEM code are shown, with a special focus on the early phenomena appearance in localization zones. The numerical tests were performed in 3D conditions with spherical grains. Contact moments law was introduced due to simulate not perfectly round sand grains. The influence of different physical parameters was studied, e.g. initial density or confining pressure. The sieve curve corresponded to the Karlsruhe sand [1]; however, in some tests, it was linearly scaled. Special attention was laid on the behaviour of the sand grains inside localization, e.g. rotation, porosity, fluctuations, etc. and forces redistribution. Emphasis was given on the pre-failure regime and early localization predictors.

Słowa kluczowe

EN

direct shear; granular material; discrete element method; localization; grain level

• Wydawca: De Gruyter
• Czasopismo: Studia Geotechnica et Mechanica
• Rocznik: 2021
• Tom: Vol. 43, nr 1
• Strony: 48--64
• Opis fizyczny: Bibliogr. 56 poz., rys., tab.

Twórcy

autor

Grabowski Aleksander

• Faculty of Civil and Environmental Engineering, Gdańsk University of Technology, Gdańsk, Poland

autor

Nitka Michał

• Faculty of Civil and Environmental Engineering, Gdańsk University of Technology, Gdańsk, Poland

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).