An energy approach to Modified Cam-Clay plasticity and damage modeling of cohesive soils
| Autor: | Kane C. Bennett |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Yield (engineering) 010102 general mathematics 0211 other engineering and technologies 02 engineering and technology Mechanics Plasticity Geotechnical Engineering and Engineering Geology Compression (physics) 01 natural sciences Stress (mechanics) Consistency (statistics) Solid mechanics Earth and Planetary Sciences (miscellaneous) Boulder clay 0101 mathematics Porosity 021101 geological & geomatics engineering |
| Zdroj: | Acta Geotechnica. 15:165-177 |
| ISSN: | 1861-1133 1861-1125 |
| Popis: | An alternative approach to Modified Cam-Clay (MCC) critical state plasticity coupled with damage is proposed. The provided hyper-elastoplastic/damage framework is motivated by a desire to ensure thermodynamic consistency of model predictions, and is shown to satisfy the principle of maximum plastic dissipation, enabling enforcement of the plastic dissipation (and Clausius–Planck) inequality. A small strain Eshelby-like stress is derived as being energy-conjugate to the plastic strain rate, and relation to the damage-energy release rate is exploited to pose a coupled damage/yield MCC criteria (MCC-D). Relations between volumetric damage and porosity changes are examined, along with a method for estimating the damage state from bulk moduli measurements. The model is shown to simulate well existing high pressure compression measurements of Boulder clay, and connections between damage-related model parameters and behavior exemplifying different microstructural states is examined through numerical experiments. |
| Databáze: | OpenAIRE |
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