Modelling creep in clay using the framework of hyper-viscoplasticity. Issue 3 (17th September 2020)

• Record Type: Journal Article
• Authors: Grimstad, Gustav; Dadrasajirlou, Davood; Ghoreishian Amiri, Seyed Ali
• Is Part Of: Géotechnique letters. Volume 10:Issue 3(2020)
• Page Start: 404
• Page End: 408
• Publication Date: 2020-09-17
• Subjects: clays -- compressibility -- constitutive relations; Geotechnical engineering -- Periodicals; Engineering geology -- Periodicals; 624.151
• DOI: 10.1680/jgele.20.00004
• Languages: English
• ISSNs: 2045-2543

Abstract

Abstract : 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.