- Title
- Numerical Implementation of a Critical State Model for Soft Rocks
- Creator
- Lloret-Cabot, Martí; Pineda, Jubert A.; Sheng, Daichao
- Relation
- Second Pan-American Conference on Unsaturated Soils. Proceedings of the Second Pan-American Conference on Unsaturated Soils (Dallas, TX 12-15 November, 2017) p. 236-246
- Publisher Link
- http://dx.doi.org/10.1061/9780784481684.025
- Publisher
- ASCE
- Resource Type
- conference paper
- Date
- 2017
- Description
- This paper details the basic tasks for the numerical implementation of a simple elasto-plastic critical state model for bonded materials (i.e., soft rocks-hard soils) into the finite element program SNAC developed at the University of Newcastle in Australia. The first task described focusses on the derivation of the incremental constitutive relationships used to represent the mechanical response of a bonded/cemented material under saturated conditions. The second task presents how these stress-strain relations can be numerically integrated using an explicit substepping scheme with automatic error control. The third task concentrates on the verification of the substepping algorithm proposed. The model used to represent the saturated mechanical response of a bonded material combines the modified Cam clay with the constitutive relationships for cemented materials proposed in Gens and Nova (1993), but incorporates some flexibility on the degradation law adopted. The role of suction and other relevant aspects of unsaturated behaviour are also discussed at the end of the paper.
- Subject
- soft rocks; hard soils; numerical implementation
- Identifier
- http://hdl.handle.net/1959.13/1451464
- Identifier
- uon:44196
- Identifier
- ISBN:9780784481684
- Language
- eng
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