Modelling creep in clay using the framework of hyper-viscoplasticity
Peer reviewed, Journal article
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OriginalversjonGéotechnique Letters. 2020, 10 (3), 404-408. 10.1680/jgele.20.00004
This paper addresses the derivation of creep models using the framework of hyper-viscoplasticity. It demonstrates that the formulations widely used already can easily be obtained using the hyper-viscoplastic formalism. This means that existing formulations (i.e. of the flow potential) are thermodynamically sound. The key assumptions are that the free energy is only a function of elastic strains and that there is no dissipation under pure volumetric swelling (tension). The presented derivations, using the framework of hyper-viscoplasticity, allows for further model development along the same lines, as presented here, with only minor modifications.