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A linearized porous brittle damage material model with distributed frictional-cohesive faults

De Bellis, M. L. and Della Vecchia, G. and Ortiz, M. and Pandolfi, A. (2016) A linearized porous brittle damage material model with distributed frictional-cohesive faults. Engineering Geology, 215 . pp. 10-24. ISSN 0013-7952. http://resolver.caltech.edu/CaltechAUTHORS:20170119-123323401

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Abstract

We present a simplified model of damaging porous material, obtained through consistent linearization from a recursive-faulting material model described in (Pandolfi et al. 2016). The brittle damage material model is characterized by special planar micro-structures, consisting of nested families of equi-spaced frictional-cohesive faults in an otherwise elastic matrix material. The linear kinematics model preserves the main microstructural features of the finite kinematics one but offers a far better computational performance. Unlike models commonly employed in geo-mechanical applications, the proposed model contains a small number of parameters, to wit, two elastic moduli, three frictional-cohesive parameters, and three hydraulic response parameters, all of which having clear physical meanings and amenable to direct experimental measurement through standard material tests. The model is validated by comparison to triaxial hydro-mechanical experimental data. Despite the paucity of material constants, the salient aspects of the observed behavior are well captured by the model, qualitatively and quantitatively. As an example of application of the model, we simulate the excavation of a borehole in a rocky embankment.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1016/j.enggeo.2016.10.010DOIArticle
http://www.sciencedirect.com/science/article/pii/S001379521630494XPublisherArticle
ORCID:
AuthorORCID
Pandolfi, A.0000-0002-7084-7456
Additional Information:© 2016 Elsevier B.V. Received 26 May 2016, Revised 2 October 2016, Accepted 12 October 2016, Available online 21 October 2016.
Group:GALCIT
Subject Keywords:Brittle damage; Multiscale modelling; Recursive faulting; Porous media; Hydraulic conductivity
Record Number:CaltechAUTHORS:20170119-123323401
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20170119-123323401
Official Citation:M.L. De Bellis, G. Della Vecchia, M. Ortiz, A. Pandolfi, A linearized porous brittle damage material model with distributed frictional-cohesive faults, Engineering Geology, Volume 215, 19 December 2016, Pages 10-24, ISSN 0013-7952, http://dx.doi.org/10.1016/j.enggeo.2016.10.010. (http://www.sciencedirect.com/science/article/pii/S001379521630494X)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:73551
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:19 Jan 2017 21:15
Last Modified:25 May 2017 21:08

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