A simple hypoplastic model with loading surface accounting for viscous and fabric effects of clays
- This paper presents a simple hypoplastic model capturing mostly all salient features of clays: rate dependency, time dependency and inherent and induced anisotropy without being restricted to only viscoplastic clays. Therefore, due to the strain rate decomposition into three parts, nonviscous clays, that is, rate-independent clays, can also be simulated. The incorporation of a loading surface allows to capture the behaviour of normal and overconsolidated clays. The model requires eight material parameters, which are simple to calibrate from standard laboratory tests. In total, 77 simulations of five different clayey-like soils are compared with experimental data. The simulations contain one oedometer test with loading–unloading–reloading cycles, creep and relaxation stages, both undrained and drained triaxial tests in compression and extension, as well as eight incremental response envelopes capturing also the directional response of Beaucaire Marl clay. Some limitations of the model such as the description of temperature effects on the behaviour of clays are also pointed out.
| Author: | Merita TafiliORCiDGND, Theodoros TriantafyllidisGND |
|---|---|
| URN: | urn:nbn:de:hbz:294-99270 |
| DOI: | https://doi.org/10.1002/nag.3122 |
| Parent Title (English): | International journal for numerical and analytical methods in geomechanics |
| Publisher: | Wiley |
| Place of publication: | Hoboken, New Jersey |
| Document Type: | Article |
| Language: | English |
| Date of Publication (online): | 2023/05/30 |
| Date of first Publication: | 2020/08/11 |
| Publishing Institution: | Ruhr-Universität Bochum, Universitätsbibliothek |
| Tag: | clays; directional response of clays; fabric (inherent) anisotropy; overconsolidated clays; rate dependence; viscosity |
| Volume: | 44 |
| Issue: | 16 |
| First Page: | 2189 |
| Last Page: | 2215 |
| Note: | Dieser Beitrag ist auf Grund des DEAL-Wiley-Vertrages frei zugänglich. |
| Institutes/Facilities: | Lehrstuhl für Bodenmechanik, Grundbau und Umweltgeotechnik |
| Dewey Decimal Classification: | Technik, Medizin, angewandte Wissenschaften / Ingenieurbau, Umwelttechnik |
| open_access (DINI-Set): | open_access |
| faculties: | Fakultät für Bau- und Umweltingenieurwissenschaften |
| Licence (English): |  Creative Commons - CC BY 4.0 - Attribution 4.0 International |
