Applications and developments of Barodesy
Fabian Schranz
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Fabian Schranz, Applications and developments of Barodesy (2018), Logos Verlag, Berlin, ISBN: 9783832589059
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Beschreibung / Abstract
Barodesy is a constitutive model for granular materials such as sand and clay. It is based on the asymptotic behaviour of granular media at a constant deformation rate.
In this work the existing sand version of Barodesy is improved. For this purpose, the underlying scalar equations are simplified using different concepts from soil mechanics.
The improved version is also compared with laboratory tests and different elastoplastic and hypoplastic constitutive relations. Also the stability of slopes and advanced stress paths such as the rotation of the princple stresses are investigated with these models.
In this work the existing sand version of Barodesy is improved. For this purpose, the underlying scalar equations are simplified using different concepts from soil mechanics.
The improved version is also compared with laboratory tests and different elastoplastic and hypoplastic constitutive relations. Also the stability of slopes and advanced stress paths such as the rotation of the princple stresses are investigated with these models.
Inhaltsverzeichnis
- BEGINN
- Introduction, overview and basic notation
- Overview
- Basic notation
- The role of constitutive models
- About the Failure
- Validations of numerical simulations
- Influence of constitutive model
- When do material models mater?
- Barodesy
- Notations used in Barodesy
- Soil behaviour and Barodesy
- Barodesy for clay
- Barodesy for sand
- Further developments for Barodesy
- New formulation for the R-function
- Implementing Ohde's compression law
- Summary of material parameters and constants
- Numerical experiments
- Principal stress rotations
- Introduction
- Models
- Kinematic analysis of the deformations
- Calculation of the stress and strain rates
- Tests with a 12 apparatus
- Tests with a hollow cylinder apparatus
- Conclusions
- Stability of infinite slopes
- Friction angle and angle of dilatancy of soil
- Mohr-Coulomb – elastoplastic
- Limit state function
- Matsuoka-Nakai – elastoplastic
- Matsuoka-Nakai – kinematic
- Hypoplasticity
- Barodesy
- Triaxial test versus simple and direct shear test
- Impact on limit state analyses
- Conclusion
- Conclusion
- Summary
- Limitations
- Outlook
- Glossary
- Recalculation of a triaxial test
- Constitutive Models
- Barodesy
- Hypoplasticity
- Sanisand
- Matlab Code for Constitutive models
- Barodesy
- Hypoplasticity
- Sanisand
- Matlab Code for Stress rotation
- Stress dependant
- Strain dependant