Original Cam-Clay Model
The Original Cam-Clay model is based on the assumption that the soil is isotropic, elasto-plastic, deforms as a continuum, and it is not affected by creep. The yield surface of the Cam clay model is described by the equation
where is the equivalent stress, is the pressure, is the pre-consolidation pressure, and is the slope of the critical state line in space.
The pre-consolidation pressure evolves as the void ratio (and therefore the specific volume ) of the soil changes. A commonly used relation is
where is the virgin compression index of the soil. A limitation of this model is the possibility of negative specific volumes at realistic values of stress.
An improvement to the above model for is the bilogarithmic form
where is the appropriate compressibility index of the soil.
Read more about this topic: Critical State Soil Mechanics
Famous quotes containing the words original and/or model:
“The echo is, to some extent, an original sound, and therein is the magic and charm of it. It is not merely a repetition of what was worth repeating in the bell, but partly the voice of the wood; the same trivial words and notes sung by a wood-nymph.”
—Henry David Thoreau (18171862)
“There are very many characteristics which go into making a model civil servant. Prominent among them are probity, industry, good sense, good habits, good temper, patience, order, courtesy, tact, self-reliance, many deference to superior officers, and many consideration for inferiors.”
—Chester A. Arthur (18291886)