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| Description
| - We deal with a modelling of bentonite behavior during the saturation process in a high level waste repository. Our work is motivated by a potential damage of the bentonite barrier due to non-uniform swelling and the model problems are formulated based on the configuration of the BRIE experiment modeled as Task 8 within the Task Force on Engineered Barrier System. The swelling problem is an extention of the original modelling task of the water transport only. The main challenge is how the gap between the rock and bentonite (often neglected in models) controls the swelling and the resulting stresses in bentonite. While in the fully confined case, the water inflow causes immediate build-up of the swelling pressure, in the real case the free swelling can occur in the first stage until the full contact between the bentonite and rock. Together with expected non-uniform water inflow (from a single fracture), the process can be quite complex. We developed a solution by means of a contact problem, i.e. non-linear solution of stress-deformation problem with swelling, in a solution-dependent computational domain and boundary condition (either free surface or continuous material allowing only compression). We solve coupled problem of non-linear diffusion (Börgesson, 1985), which is equivalent expression of Richards’ equation, and non-linear elasticity in standard multiphysics simulator ANSYS (Ansys, 2010). The swelling is defined as equivalent to heat expansion, with a coefficient dependent on water content according to literature data. The effective Youngʼs modulus is also dependent on water content, with the decrease close to zero corresponding to the plastic state.
- We deal with a modelling of bentonite behavior during the saturation process in a high level waste repository. Our work is motivated by a potential damage of the bentonite barrier due to non-uniform swelling and the model problems are formulated based on the configuration of the BRIE experiment modeled as Task 8 within the Task Force on Engineered Barrier System. The swelling problem is an extention of the original modelling task of the water transport only. The main challenge is how the gap between the rock and bentonite (often neglected in models) controls the swelling and the resulting stresses in bentonite. While in the fully confined case, the water inflow causes immediate build-up of the swelling pressure, in the real case the free swelling can occur in the first stage until the full contact between the bentonite and rock. Together with expected non-uniform water inflow (from a single fracture), the process can be quite complex. We developed a solution by means of a contact problem, i.e. non-linear solution of stress-deformation problem with swelling, in a solution-dependent computational domain and boundary condition (either free surface or continuous material allowing only compression). We solve coupled problem of non-linear diffusion (Börgesson, 1985), which is equivalent expression of Richards’ equation, and non-linear elasticity in standard multiphysics simulator ANSYS (Ansys, 2010). The swelling is defined as equivalent to heat expansion, with a coefficient dependent on water content according to literature data. The effective Youngʼs modulus is also dependent on water content, with the decrease close to zero corresponding to the plastic state. (en)
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| Title
| - Model of Bentonite Swelling Solved as a Contact Problem
- Model of Bentonite Swelling Solved as a Contact Problem (en)
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| skos:prefLabel
| - Model of Bentonite Swelling Solved as a Contact Problem
- Model of Bentonite Swelling Solved as a Contact Problem (en)
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| skos:notation
| - RIV/46747885:24220/14:00000099!RIV15-MSM-24220___
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| http://linked.open...avai/riv/aktivita
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| http://linked.open...avai/riv/aktivity
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| http://linked.open...vai/riv/dodaniDat
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| http://linked.open...aciTvurceVysledku
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| http://linked.open.../riv/druhVysledku
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| http://linked.open...iv/duvernostUdaju
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| http://linked.open...titaPredkladatele
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| http://linked.open...dnocenehoVysledku
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| http://linked.open...ai/riv/idVysledku
| - RIV/46747885:24220/14:00000099
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| http://linked.open...riv/jazykVysledku
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| http://linked.open.../riv/klicovaSlova
| - deep repository; modelling; swelling; bentonite (en)
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| http://linked.open.../riv/klicoveSlovo
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| http://linked.open...ontrolniKodProRIV
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| http://linked.open...in/vavai/riv/obor
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| http://linked.open...ichTvurcuVysledku
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| http://linked.open...cetTvurcuVysledku
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| http://linked.open...vavai/riv/projekt
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| http://linked.open...UplatneniVysledku
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| http://linked.open...iv/tvurceVysledku
| - Hokr, Milan
- Škarydová, Ilona
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| http://localhost/t...ganizacniJednotka
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