Numerical investigation of crack damage development and microfracturing in brittle rocks is a widely studied topic, given the number of applications involved. In the framework of the Discrete Element Method (DEM) formulation, the grain-based distinct element model with random polygonal blocks can represent an alternative to the Bonded-Particle Model (BPM) based on particles. Recently, a new engine called Neper has been made available for generating 3D Voronoi grains. The aim of this study is to investigate the applicability of a Neper-based 3D Voronoi tessellation technique for the simulation of the mechanical macro response of rocks. Simulation of unconfined compression tests on synthetic specimens is conducted and a calibration procedure tested. The issue related to scale effects is also addressed, with an application to the case study of a deep geothermal reservoir.

3D Voronoi Tessellation for the Study of Mechanical Behavior of Rocks at Different Scales / Insana, A.; Barla, M.. - 126:(2021), pp. 1010-1017. (Intervento presentato al convegno Iacmag 2021 tenutosi a Torino nel 5-8 May 2021) [10.1007/978-3-030-64518-2_120].

3D Voronoi Tessellation for the Study of Mechanical Behavior of Rocks at Different Scales

A. Insana;M. Barla
2021

Abstract

Numerical investigation of crack damage development and microfracturing in brittle rocks is a widely studied topic, given the number of applications involved. In the framework of the Discrete Element Method (DEM) formulation, the grain-based distinct element model with random polygonal blocks can represent an alternative to the Bonded-Particle Model (BPM) based on particles. Recently, a new engine called Neper has been made available for generating 3D Voronoi grains. The aim of this study is to investigate the applicability of a Neper-based 3D Voronoi tessellation technique for the simulation of the mechanical macro response of rocks. Simulation of unconfined compression tests on synthetic specimens is conducted and a calibration procedure tested. The issue related to scale effects is also addressed, with an application to the case study of a deep geothermal reservoir.
2021
978-3-030-64517-5
978-3-030-64518-2
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2859422