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Testing and modeling of the mechanical behavior of dolomite in the Wudongde hydropower plant
- Source :
- Geomechanics and Geoengineering. 11:270-280
- Publication Year :
- 2016
- Publisher :
- Informa UK Limited, 2016.
-
Abstract
- In order to understand the mechanical behaviours of the surrounding rocks in the underground caverns of the Wudongde hydropower plant, triaxial tests are performed on a type of dolomite. It is revealed that damage induced by crack development is the main factor controlling the nonlinear plastic deformation and failure behaviour of the dolomite in both pre- and post-peak regimes. Based on this understanding, a coupled elastoplastic damage model is developed for capturing the dolomite’s mechanical behaviours. In the model, the effects of plasticity and damage on rocks is described by introducing plastic hardening and damage softening commonly in the plastic yield surface. Which are both derived from a suitable Helmholtz free energy function. The model is used to simulate the triaxial tests. Comparisons between test results and the numerical modelling show that the developed model is capable of describing the macro mechanical behaviours of the Wudongde dolomite.
- Subjects :
- business.industry
Yield surface
Constitutive equation
Dolomite
02 engineering and technology
Structural engineering
Plasticity
Geotechnical Engineering and Engineering Geology
Triaxial shear test
020501 mining & metallurgy
symbols.namesake
0205 materials engineering
Helmholtz free energy
symbols
Hardening (metallurgy)
Geotechnical engineering
business
Softening
Geology
Subjects
Details
- ISSN :
- 17486033 and 17486025
- Volume :
- 11
- Database :
- OpenAIRE
- Journal :
- Geomechanics and Geoengineering
- Accession number :
- edsair.doi...........f734a5835751f39972441ded65d4ccac