Abstract
This paper presents a new rate-dependent hypoplastic constitutive model for overconsolidated clays. The model is developed based on a basic hypoplastic model proposed recently for sand. New density and stiffness factors are introduced to account for history dependence. The Matsuoka-Nakai failure surface is incorporated for the limit stress criterion. With six constitutive parameters, the model is capable of predicting the hardening/softening, shear dilation/contraction, and asymptotic state for overconsolidated clays. Comparison between numerical predictions and experimental results shows this model can properly describe the main features of both reconstituted and undisturbed clays with different overconsolidation ratios.
| Original language | English |
|---|---|
| Article number | 103486 |
| Journal | Computers and Geotechnics |
| Volume | 123 |
| DOIs | |
| Publication status | Published - Jul 2020 |
Keywords
- Asymptotic state boundary surface
- Critical state
- Hypoplastic model
- Overconsolidation ratio
- Response envelope
ASJC Scopus subject areas
- Geotechnical Engineering and Engineering Geology
- Computer Science Applications
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Cite this
Wang, S., Wu, W., Zhang, D., & Kim, J. R. (2020). Extension of a basic hypoplastic model for overconsolidated clays. Computers and Geotechnics, 123, [103486]. https://doi.org/10.1016/j.compgeo.2020.103486