Chemo-elasto-plastic model

The chemo-elasto-plastic model described above requires the determination of eight constants five mechanical constants and three constants describing the influence of contaminant... 

The purpose of this section is to compare the predictions of the chemo-elasto-plastic model with experimental data showing the chemical effects of organic liquids on clay. For this exercise, the permeation experiments conducted by Fernandez and Quigley (1985,1991) on specimens of Sarnia clay are considered, with the focus on the results obtained for permeation of ethanol. A simplified representation of these experiments can only be considered at this time, as the data available are not... 

Using the chemo-elasto-plastic model implemented in the finite elements program LAGAMINE, and the material parameters listed in Table 1, the volumetric strains due to changes in effective stress and concentration are predicted. The value of X was estimated from the volumetric response measured by Fernandez and Quigley (1991) for the application of external vertical effective stress, with the assumption that A o=0.5. The constant k was taken as X/5, which is typical for clays. Values typical for clays were selected for the elastic shear modulus G and the critical state constant M. 

A chemo-elasto-plastic model for the behaviour of clays in contact with a single contaminant has been presented. The model has been implemented in the finite elements program LAGAMB JE providing an efficient tool for solving problems involving clay-contaminant interaction. Comparison of model predictions with available... 

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