Murthy, BRS and Vatsala, A and Nagaraj, TS (1991) Revised Cam-Clay Model. In: Journal of Geotechnical and Geoenvironmental Engineering, 117 (6). pp. 851-871.
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The Cam-clay models, or any other plasticity-based models, do not make distinction between the mode of stress transfer in coarse- and fine-grained soils. An examination of behavior at micro level in fine-grained soils, from the consideration of load transfer through physico-chemical interactions, suggests that the plastic compressions result from the grouping of particles into larger clusters and that elastic compressions result from the decrease in the spacing between particles. During shearing, these clusters gradually get dismembered, releasing the locked-in energy. The effect of such dismembering of clusters can be easily incorporated into the original Cam-clay model, and better predictions can be obtained with the associated flow rule, itself, for both normally and over consolidated states. The method essentially defines the hardening of yield surfaces with internal changes in the spacing between particles, instead of changes in externally observed plastic strains. The approach describes the behavior of over consolidated soils as yielding along successfively hardening Roscoe surfaces with gradually varying plastic properties.
|Item Type:||Journal Article|
|Additional Information:||Copyright of this article belongs to American Society of Civil Engineers.|
|Department/Centre:||Division of Mechanical Sciences > Civil Engineering|
|Date Deposited:||30 Nov 2010 05:52|
|Last Modified:||30 Nov 2010 05:52|
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