- Title
- Elastic or elasto-plastic: examination of certain strain increments in the Barcelona Basic Model
- Creator
- Solowski, Wojciech T.; Sloan, Scott W.
- Relation
- Second European Conference on Unsaturated Soils. Unsaturated Soils: Research and Applications, Volume 2 (Napoli, Italy 20-22 June, 2012) p. 85-91
- Publisher Link
- http://dx.doi.org/10.1007/978-3-642-31343-1_11
- Publisher
- Springer Berlin Heidelberg
- Resource Type
- conference paper
- Date
- 2012
- Description
- The Barcelona Basic Model (Alonso et al. 1990) yield locus has been proven to be non-convex for certain set of parameters (see Wheeler at al. 2002). This paper shows that as this model is formulated in the semi-logarithmic space, the elastic stress path corresponding to a given strain increment is not a straight line. Therefore, the simple assumption that the stress increment is elastic when the stress state is elastic at the beginning and the end of the stress path is no longer correct. The paper examines some strain increments leading to elasto-plastic stress paths which may be easily mistaken for being fully elastic. Some of the stress paths described in the paper can only occur when certain sets of parameters of the Barcelona Basic Model are selected, but others are not dependent on the model parameter set. In the latter case the described mechanism may be relevant to great many other constitutive models which assume a constant shear modulus G and are formulated in the semi-logarithmic space.
- Subject
- Barcelona Basic Model; non-linear elastic law; stress integration; non-convex yield surface
- Identifier
- http://hdl.handle.net/1959.13/1328025
- Identifier
- uon:25802
- Identifier
- ISBN:9783642313424
- Language
- eng
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