Computer Simulation of Creep of Clay

by Roland Pusch, Prof.; Div. Soil Mech., Univ. of Lulea, 951 87 Lulea, Sweden,
Paul Feltham, Prof.; Dept. of Physics. Brunel Univ., Middlesex, England,

Serial Information: Journal of the Geotechnical Engineering Division, 1981, Vol. 107, Issue 1, Pg. 95-104

Document Type: Journal Paper


The variable character of the particle contacts in natural illitic clay implies a spectrum of bond strengths. When a sufficiently high external shear stress is applied some weaker interlinking particle groups are transformed to domains which act as slip units. In creep induced by a constant deviatoric stress, the number and heights of thermally activable barriers to slip will vary in space and time. This is encompassed by a stochastic model, a simple version of which was used in a computer simulation. The dependence of the strain on time was found to be logarithmic, in good agreement with experiments.

Subject Headings: Shear stress | Computer models | Creep | Clays | Particles | Soil strength | Bonding | Thermal effects

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