State boundary surface of a hypoplastic model for clays
1.
SYSNO ASEP
0026642
Document Type
J - Journal Article
R&D Document Type
Journal Article
Subsidiary J
Ostatní články
Title
State boundary surface of a hypoplastic model for clays
Title
Mezní plocha hypoplastického modelu pro jíly
Author(s)
Mašín, David (UTAM-F) Herle, Ivo (UTAM-F)
Source Title
Computers and Geotechnics. - : Elsevier
- ISSN 0266-352X
Roč. 32, č. 6 (2005), s. 400-410
Number of pages
11 s.
Language
eng - English
Country
GB - United Kingdom
Keywords
hypoplasticity ; clay ; limit state
Subject RIV
JM - Building Engineering
R&D Projects
GA103/04/0672 GA ČR - Czech Science Foundation (CSF)
CEZ
AV0Z20710524 - UTAM-F (2005-2011)
Annotation
The paper studies some consequences of the mathematical formulation of the recently proposed hypoplastic model for clays. Particular attention is paid to the question if the hypoplastic model predicts existence of the state boundary surface, defined as a boundary of all admissible states in the stress-void ratio space. It is shown that the model enables us to derive an explicit formulation of asymptotic (swept-out-memory) states in the stress-void ratio space, which constitute so-called swept-out-memory surface. Further it is demonstrated that the swept-out-memory surface is a close approximation of the state boundary surface although, in general, they do not coincide. Finally, the influence of constitutive parameters on the shape of the swept-out-memory surface is studied. For parameters reasonable for fine-grained soils its shape is similar to the state boundary surface of the Modified Cam clay model.
