Numerical analysis of desiccation, shrinkage and cracking in low plasticity clayey soils

Conference item


Prat, P, Levatti, HU and Ledesma, A (2017). Numerical analysis of desiccation, shrinkage and cracking in low plasticity clayey soils. XIV International Conference on Computational Plasticity. Fundamentals and Applications. Barcelona, Spain 05 - 07 Sep 2017 London South Bank University.
AuthorsPrat, P, Levatti, HU and Ledesma, A
Abstract

This paper presents a numerical study of the desiccation processes of low-plasticity clayey soils that usually result in shrinkage and often in cracking. For the theoretical development of the numerical model, concepts of Unsaturated Soils Mechanics and of classical Strength of Materials are used as a framework for formulating phenomena such as water flow in deformable porous media and cracking. The mathematical formulation of the problem and its implementation in a hydro-mechanical coupled model is presented, in order to simulate fluid flow and cracking in soils, for which the FEM and the node release technique is combined. The code developed has been used to perform several numerical analyses on radial sections of cylindrical soil specimens subjected to a drying process for which experimental laboratory data was available. The objective of these simulations is to determine the mechanisms by which the soil shrinks and cracks during desiccation. The results show the capabilities of the approach to reproduce the main features of the problem, with desiccation, shrinkage, and cracking being reproduced consistently during a desiccation cycle. The model also highlights the key role of the displacement and suction boundary conditions in the development of cracks as a consequence of tensile stress fields. Finally, the model has revealed the necessity of further research in the study of the soil-container and soil-atmosphere interaction in order to reproduce with more accuracy the changes in the main variables.

Keywordscracking; desiccation; shrinkage; fracture; simulation
Year2017
PublisherLondon South Bank University
Accepted author manuscript
License
CC BY 4.0
Publication dates
Print05 Sep 2017
Publication process dates
Deposited12 Oct 2017
Accepted03 Mar 2017
Permalink -

https://openresearch.lsbu.ac.uk/item/86xz6

  • 3
    total views
  • 0
    total downloads
  • 1
    views this month
  • 0
    downloads this month

Related outputs

Numerical and experimental study of initiation and propagation of desiccation cracks in clayey soils
Levatti, HU, Prat, PC and Ledesma, A (2019). Numerical and experimental study of initiation and propagation of desiccation cracks in clayey soils. Computers and Geotechnics. 105, pp. 155-167.
Influence of Sewage Sludge Biochar on the Microbial Environment, Chinese Cabbage Growth, and Heavy Metals Availability of Soil
Levatti Lopez, H. and Yu, G (2018). Influence of Sewage Sludge Biochar on the Microbial Environment, Chinese Cabbage Growth, and Heavy Metals Availability of Soil. in: Lazinica, A and Kordic, V (ed.) Biochar - An Imperative Amendment for Soil and the Environment IntechOpen.
Numerical modelling of formation and propagation of drying cracks in soils
Levatti, HU, Prat, P and Ledesma, A (2007). Numerical modelling of formation and propagation of drying cracks in soils. IX International Conference on Computational Plasticity (COMPLAS 2007). Barcelona 05 - 07 Sep 2007 London South Bank University.
Fracture mechanics for crack propagation in drying soils
Prat, P, Ledesma, A, Lakshmikhanta, MR, Levatti, HU and Tapia, J (2008). Fracture mechanics for crack propagation in drying soils. 12th International Conference on Computer Methods and Advances in Geomechanics 2008. Goa, India 01 - 06 Oct 2008 London South Bank University.
Numerical Modelling of desiccation processes in clayey soils
Levatti, HU, Prat, P and Ledesma, A (2009). Numerical Modelling of desiccation processes in clayey soils. 1st International Symposium on Computational Geomechanics (ComGeo I). Juan-les-Pins, France 29 Apr - 01 May 2009 London South Bank University.
Desecación y deformación de suelos arcillosos
Levatti, HU, Ledesma, A and Prat, P (2009). Desecación y deformación de suelos arcillosos. Congreso de Métodos Numéricos en Ingeniería 2009. Barcelona, Spain 29 Jun - 02 Jul 2009 London South Bank University.
Influence of cracking in the desiccation process of clay soils
Levatti, HU, Prat, P and Ledesma, A (2009). Influence of cracking in the desiccation process of clay soils. X International Conference on Computational Plasticity (COMPLAS X). Barcelona, Spain 02 - 04 Sep 2009 London South Bank University.
GE Jet Engine Bracket Challenge: A Case Study in Sustainable Design
Levatti, HU and Morgan, HD (2016). GE Jet Engine Bracket Challenge: A Case Study in Sustainable Design. InImpact: The Journal of Innovation Impact. 7 (2), pp. 95-107.
Computational Methodology for Optimal Design of Additive Layer Manufactured Turbine Bracket
Levatti, HU, Innocente, MS, Morgan, HD, Cherry, J, Lavery, NP, Mehmood, S, Cameron, I and Sienz, J (2016). Computational Methodology for Optimal Design of Additive Layer Manufactured Turbine Bracket. InImpact: The Journal of Innovation Impact. 7 (2), pp. 641-652.
Ground penetrating radar system for detection of desiccation cracks in soils
Levatti, HU, Prat, P, Ledesma, A and Cuadrado, A (2013). Ground penetrating radar system for detection of desiccation cracks in soils. Third International Symposium on Computational Geomechanics (COMGEO III). Krakow, Poland 21 - 23 Aug 2013 London South Bank University.
GE Jet Engine Bracket Challenge: A Case Study in Sustainable Design
Levatti, HU, Morgan, HD, Bould, D, Gil, A and Sienz, J (2014). GE Jet Engine Bracket Challenge: A Case Study in Sustainable Design. First International Conference on Sustainable Design and Manufacturing (SDM-14). Cardiff, UK 28 - 30 Apr 2014 London South Bank University.
Computational Methodology for Optimal Design of Additive Layer Manufactured Turbine Bracket
Levatti, HU, Innocente, MS, Morgan, HD, Cherry, J, Lavery, NP, Mehmood, S, Cameron, I and Sienz, J (2014). Computational Methodology for Optimal Design of Additive Layer Manufactured Turbine Bracket. First International Conference on Sustainable Design and Manufacturing (SDM-14). Swansea, UK 28 - 30 Apr 2014 London South Bank University.
Numerical Investigation into Dynamic Loading of Rubber Compound
Levatti, HU, Belblidia, F, Mehmood, S, Lee, CH, Sienz, J, Gethin, DT and Arnold, C (2015). Numerical Investigation into Dynamic Loading of Rubber Compound. 23rd UK Conference of the Association for Computational Mechanics in Engineering. Swansea, UK 08 - 10 Apr 2015 London South Bank University.
Experimental analysis of 3D cracking in drying soils using Ground Penetrating Radar
Levatti, HU (2017). Experimental analysis of 3D cracking in drying soils using Ground Penetrating Radar. Geotechnical Testing Journal. 40 (2).