Comparative performance of some constitutive models in stress rotation

Abstract

The dilatancy/contractancy of soil is of particular importance for compaction, consolidation, liquefaction, etc. Interestingly, constitutive relations are often unsatisfactory in modelling volume changes in the sense that their predictions deviate considerably from each other. This scatter is pronounced in problems with stress rotation. Therefore, in this paper some selected constitutive relations are investigated with respect to their performance at stress rotation. The obtained numerical simulations are compared with each other and also with experimental results from the 1γ2ε and the hollow cylinder apparatuses.

Some remarks on the performance of three advanced soil constitutive models in the small-strain region

“…Although all these constitutive models were shown to successfully reproduce various aspects of soil small strain and cyclic behaviour, there is constant need for validation studies reporting limitations of advanced soil constitutive models (e.g. [34][35][36][37]). This short communication presents three advanced sand constitutive models, namely, the Dafalias-Manzari sand model [9], the hypoplastic sand model [10,11] and the Severn-Trent sand model [32] regarding their performance in capturing chosen aspects of the small strain behaviour relevant to shear wave propagation in earthquakes and cyclic loading in offshore and urban applications.…”