An anisotropic hardening elastoplastic model for clays and sands and its application to FE analysis

作者：Sun DA^*; Matsuoka H; Yao YP; Ishii H

来源：Computers and Geotechnics, 2004, 31(1): 37-46.

DOI：10.1016/j.compgeo.2003.11.003

• anisotropic
• constitutive model
• clay
• sand

The Sekiguchi-Ohta model is extended to be a unified three-dimensional elastoplastic model for clays, silts and sands by introducing a transformed stress tensor (σ) over tilde (ij) and a new hardening parameter H. The model can describe the negative and positive dilatancy of soils with an initially stress-induced anisotropy in three-dimensional (3D) stress. An elastoplastic constitutive tensor is derived for the application of the proposed model to finite element (FE) analyses. A FE analysis example for a test embankment is given and the result demonstrates that the proposed model can predict reasonably the deformation of anisotropically consolidated clay and sand layers under embankment loading.

• 出版日期2004
• 单位北京航空航天大学