MPM simulations of granular column collapse with a new constitutive model for the solid-fluid transition
Visualitza/Obre
Estadístiques de LA Referencia / Recolecta
Inclou dades d'ús des de 2022
Cita com:
hdl:2117/187322
Tipus de documentText en actes de congrés
Data publicació2017
EditorCIMNE
Condicions d'accésAccés obert
Tots els drets reservats. Aquesta obra està protegida pels drets de propietat intel·lectual i
industrial corresponents. Sense perjudici de les exempcions legals existents, queda prohibida la seva
reproducció, distribució, comunicació pública o transformació sense l'autorització del titular dels drets
Abstract
Dry granular flows are very common both in many natural phenomena (flow-like landslides) as well as in industrial processes. To model granular flows in the framework of continuum mechanics, a key issue is the formulation of a suitable constitutive model, capable of capturing the complex rheological behaviour of the granular material in a wide range of strain rates. In this contribution, a physically based model capable of reproducing the behaviour of granular materials in different flow regimes is briefly summarized. Both the stress tensor and the dissipated energy are calculated as the sum of a quasi-static and a collisional contribution: the former one is modelled by employing an elasto-plastic model incorporating the critical state concept, whereas the latter stems from the kinetic theory of granular gases. The constitutive model has been implemented in the MPM research code Anura3D and applied to the simulation of the collapse of a dry granular column. The results show that the model can deal with the phase transition between the solid- and the fluid-like behaviour. The evolution of the state variables, the state of stress and the energy contributions is investigated in details.
ISBN978-84-946909-7-6
Fitxers | Descripció | Mida | Format | Visualitza |
---|---|---|---|---|
Particles_2017-48_MPM Simulations of granular.pdf | 2,381Mb | Visualitza/Obre |