SANISAND-H: A sand bounding surface model for high pressures

0578850 - ÚT 2024 RIV GB eng J - Článek v odborném periodiku
Zhang, A. - Dafalias, Yannis F. - Wang, D.
SANISAND-H: A sand bounding surface model for high pressures.
Computers and Geotechnics. Roč. 161, September (2023), č. článku 105579. ISSN 0266-352X. E-ISSN 1873-7633
Grant CEP: GA ČR GA23-05338S
Institucionální podpora: RVO:61388998
Klíčová slova: constitutive model * plasticity * critical state * high pressure * bounding surface * sand
Obor OECD: Civil engineering
Impakt faktor: 5.3, rok: 2022
Způsob publikování: Omezený přístup
https://www.sciencedirect.com/science/article/pii/S0266352X23003361

This paper presents a new bounding surface constitutive model for sand, named SANISAND-H, capable of predicting the shear and volumetric behavior of the material under extra-high range of pressures, in addition to normal pressures. The model is an extension of the SANISAND08 model (Taiebat and Dafalias, 2008) with a closed cone-type yield surface that obeys rotational and isotropic hardening. The critical state line and the limiting isotropic compression curve of the SANISAND08 model are modified to accommodate a wide range of pressures. A new constitutive ingredient is the definition of a reference compression curve that serves as bounding surface for establishing the isotropic hardening rule of the yield surface. The kinematic hardening rule and stress-dilatancy relationship of the SANISAND08 model are significantly modified, to better capture the response of sands under high pressure. The value of the back stress ratio at the initiation of a new loading process is re-introduced, ensuring a smooth elastic-plastic transition necessary for accurate simulation of the response under loading reversals. The SANISAND-H model simulations are in very good agreement with test data for Toyoura and Cambria sands under various drained and undrained monotonic stress loading paths in a wide range of densities and pressures.
Trvalý link: https://hdl.handle.net/11104/0348038