Abstract
| Language | English |
|---|---|
| Title of host publication | Engineering in Chalk |
| Subtitle of host publication | Proceedings of the Chalk 2018 Conference |
| Editors | J. A. Lawrence, M. Preene, U. L. Lawrence, R. Buckley |
| Place of Publication | London |
| Publisher | ICE Publishing |
| Pages | 275-282 |
| Number of pages | 8 |
| ISBN (Electronic) | 9780727764089 |
| ISBN (Print) | 9780727764072 |
| DOIs | |
| Publication status | Published - 2018 |
| Event | Engineering in Chalk 2018 International Conference - Imperial College London, London, United Kingdom Duration: 17 Sep 2018 → 19 Sep 2018 https://www.chalk2018.org/about/committees |
Conference
| Conference | Engineering in Chalk 2018 International Conference |
|---|---|
| Country | United Kingdom |
| City | London |
| Period | 17/09/18 → 19/09/18 |
| Internet address |
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A constitutive model for the hydro-chemo-mechanical behaviour of chalk. / Ciantia, Matteo.
Engineering in Chalk: Proceedings of the Chalk 2018 Conference. ed. / J. A. Lawrence; M. Preene; U. L. Lawrence; R. Buckley. London : ICE Publishing, 2018. p. 275-282.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
TY - GEN
T1 - A constitutive model for the hydro-chemo-mechanical behaviour of chalk
AU - Ciantia, Matteo
PY - 2018
Y1 - 2018
N2 - The mechanical properties of soft, highly porous carbonate rocks are known to be significantly affected by water saturation: both stiffness and strength decrease for wetting in the short term and for chemical dissolution in the long term. Both processes mainly affect the bonds between the carbonate grains: immediately after inundation depositional bonds fall into suspension whereas diagenetic bonds dissolve more slowly. In this work a strain hardening hydro – chemo - mechanical coupled elasto-plastic constitutive model for soft carbonate rocks is presented. The concept of extended hardening rules is here enriched: weathering functions are determined by employing a micro to macro simple upscaling procedures. Chemical damage is introduced in the formulation by means of a scalar damage function and its temporal evolution is also described using a multiscale approach. A new term is added to the strain rate decomposition tensor in order to incorporate the dissolution induced chemical deformations developing once the soft rock is turned into a granular material. The reference material is chalk from Butser Hill in Hampshire. After calibration, the model is validated by performing finite element simulations of rigid footing experiments from literature.
AB - The mechanical properties of soft, highly porous carbonate rocks are known to be significantly affected by water saturation: both stiffness and strength decrease for wetting in the short term and for chemical dissolution in the long term. Both processes mainly affect the bonds between the carbonate grains: immediately after inundation depositional bonds fall into suspension whereas diagenetic bonds dissolve more slowly. In this work a strain hardening hydro – chemo - mechanical coupled elasto-plastic constitutive model for soft carbonate rocks is presented. The concept of extended hardening rules is here enriched: weathering functions are determined by employing a micro to macro simple upscaling procedures. Chemical damage is introduced in the formulation by means of a scalar damage function and its temporal evolution is also described using a multiscale approach. A new term is added to the strain rate decomposition tensor in order to incorporate the dissolution induced chemical deformations developing once the soft rock is turned into a granular material. The reference material is chalk from Butser Hill in Hampshire. After calibration, the model is validated by performing finite element simulations of rigid footing experiments from literature.
U2 - 10.1680/eiccf.64072.275
DO - 10.1680/eiccf.64072.275
M3 - Conference contribution
SN - 9780727764072
SP - 275
EP - 282
BT - Engineering in Chalk
A2 - Lawrence, J. A.
A2 - Preene, M.
A2 - Lawrence, U. L.
A2 - Buckley, R.
PB - ICE Publishing
CY - London
ER -