Comparison of Single and Double Surface Work Hardening Models for Granular Soil

Among various constitutive models proposed thus far in order to predict the behavior of granular soils with different stress paths, Lade's two models, one with a single yield surface and the other with two intersecting yield surfaces which have been evaluated to be of high applicability, are compared. As a series of stress path test results for granular soils showed that plastic deformation, let alone elastic one developed on yield surface and the direction of stress had an influence on the direction of plastic deformation increment. Lade's double surface work-hardening model presented better accordence to test results than single surface one. Also the behavior of actual foundation was more accurately by double surface model.