Abstract
Abstract A unified constitutive law, which is capable of modelling the behaviour of both cohesive material and frictional material, is formulated based on the concept of “Extended Spatially Mobilized Plane (Extended SMP)” with a parameter of “bonding stress σo”. The “Extended SMP” includes the SMP applicable to frictional materials such as granular materials (σo=0) and the octahedral plane applicable to cohesive materials such as metals (σo→∞) at the two extremities. This corresponds to the fact that the two extremities of frictional and cohesive materials are granular material and metal. The constitutive law is quantitatively verified by experimental data of triaxial compression and extension tests on a cement-treated sand.
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