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A virtual testing strategy to determine effective yield criteria for porous pressure sensitive solids / Mahshid Ranjbar; Djordje Peric

International Journal of Rock Mechanics and Mining Sciences, Volume: 138, Start page: 104625

Swansea University Author: Djordje, Peric

  • Accepted Manuscript under embargo until: 12th January 2022

Abstract

The aim of this work is to determine an effective yield criteria for porous pressure sensitive solids by employing a virtual testing strategy. The focus is on the pressure sensitivity typically displayed by geomaterials, such as sandstone. Virtual testing strategy is based on computational homogenis...

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Published in: International Journal of Rock Mechanics and Mining Sciences
ISSN: 1365-1609
Published: Elsevier BV 2021
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa56030
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Abstract: The aim of this work is to determine an effective yield criteria for porous pressure sensitive solids by employing a virtual testing strategy. The focus is on the pressure sensitivity typically displayed by geomaterials, such as sandstone. Virtual testing strategy is based on computational homogenisation approach following a unified variational formulation, which provides bounds on the effective material properties for a given choice of the Representative Volume Element (RVE). In order to estimate the effective properties of porous solid, the constitutive behaviour of continuum matrix is assumed to follow the standard Drucker–Prager elasto-plastic model. The computationally generated effective yield criteria for porous solids are obtained for various RVE choices and compared against the recently proposed analytical estimates for Drucker–Prager type solids and the SR4 constitutive model for soft rocks. The developed virtual testing strategy is applied to estimate the effective properties of a realistic rock sample, thus illustrating a wide range of potential applications.
Keywords: Multi-scale, Yield criterion, Computational homogenisation, Virtual testing, Porous elasto-plastic materials
College: College of Engineering
Start Page: 104625