Numerical Implementation of a Critical State Model for Soft Rocks

Lloret-Cabot, M. , Pineda, J. A. and Sheng, D. (2018) Numerical Implementation of a Critical State Model for Soft Rocks. In: 2nd Pan-American Conference on Unsaturated Soils (PANAM-UNSAT 2017), Dallas, TX, USA, 12-15 Nov 2017, pp. 236-246. ISBN 9780784481684 (doi:10.1061/9780784481684.025)

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Abstract

This paper details the basic tasks for the numerical implementation of a simple elasto-plastic critical state model for bonded materials (i.e. soft rocks-hard soils) into the finite element program SNAC developed at the University of Newcastle in Australia. The first task described focusses on the derivation of the incremental constitutive relationships used to represent the mechanical response of a bonded/cemented material under saturated conditions. The second task presents how these stress-strain relations can be numerically integrated using an explicit substepping scheme with automatic error control. The third task concentrates on the verification of the substepping algorithm proposed. The model used to represent the saturated mechanical response of a bonded material combines the modified Cam clay with the constitutive relationships for cemented materials proposed in Gens & Nova (1993), but incorporates some flexibility on the degradation law adopted. The role of suction and other relevant aspects of unsaturated behaviour are also discussed at the end of the paper.

Item Type:Conference Proceedings
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Lloret-Cabot, Dr Marti
Authors: Lloret-Cabot, M., Pineda, J. A., and Sheng, D.
College/School:College of Science and Engineering > School of Engineering > Infrastructure and Environment
ISSN:0895-0563
ISBN:9780784481684
Published Online:20 June 2018
Copyright Holders:Copyright © 2018 ASCE
First Published:First published in 2nd Pan-American Conference on Unsaturated Soils (PANAM-UNSAT 2017): 236-246
Publisher Policy:Reproduced in accordance with the publisher copyright policy
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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
717661COUPLEDSimon Wheeler & Marti Lloret-CabotEuropean Commission (EC)706712ENG - ENGINEERING INFRASTRUCTURE & ENVIR