Abstract
Based on the experimental fact that the test results of cemented sands under constant mean effective principal stresses (σm=const.) can be uniquely arranged on “Extended Spatially Mobilized Plane” (Extended SMP) which is modified from the original SMP by introducing “bonding stress σ0” (=c·cot φ), an elasto-plastic model for frictional and cohesive materials is derived from “tij-sand model” for frictional materials by taking the effect of cohesion (σ0) into consideration. The proposed model includes the Mises type model for metals (σ0→∞) and the tij-sand model for granular materials (σ0=0) at the both ends. It can predict the deformation characteristics of cemented sands under 3-D stress conditions. The overall good agreement between predictions and measurements indicates that the proposed model is able to predict the behaviour of frictional and cohesive materials under various kinds of 3-D stress paths.
