Abstract
We describe the large strain implementation of an elasto-plastic model for structured soils into G-PFEM, a code developed for geotechnical simulations using the Particle Finite Element Method. The constitutive model is appropriate for naturally structured clays, cement-improved soils and soft rocks. Structure may result in brittle behavior even in contractive paths; as a result, localized failure modes are expected in most applications. To avoid the pathological mesh-dependence that may accompany strain localization, a nonlocal reformulation of the model is employed. The resulting constitutive model is incorporated into a numerical code by means of a local explicit stress integration technique. To ensure computability this is hosted within a more general Implicit-Explicit integration scheme (IMPLEX). The good performance of these techniques is illustrated by means of element tests and boundary value problems.
Original language | English |
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Article number | 103215 |
Pages (from-to) | 1-13 |
Number of pages | 13 |
Journal | Computers and Geotechnics |
Volume | 116 |
Early online date | 30 Aug 2019 |
DOIs | |
Publication status | Published - Dec 2019 |
Keywords
- PFEM
- structured soils
- nonlocal elasto-plasticity
- constitutive modeling