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Material Microstructure Effects in Thermo-Hydro-Mechanical Modelling of Bentonite

机译：膨润土热水机械造型中的材料微观结构效应

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This paper discusses the introduction of effects related to the bentonite microstructure into a new fully coupled thermo-hydro-mechanical (THM) finite element code. After a brief review of the governing balance equations and their implementation, the paper discusses in greater details the material microstructure effect on the hydraulic behaviour of bentonite and how to incorporate it in the modelling framework. Based on the experimental data for the MX-80 bentonite, the parameters needed for the new formulation are calibrated and employed in modelling of a constant volume infiltration experiment. The obtained swelling pressure from the numerical simulation is in good agreement with experimental results and improved when compared to the simulation which does not take into account bentonite microstructure. The framework enhancement allows also for a better understanding of the microstructure role in the macroscopically observed bentonite behaviour.
机译：本文讨论了与膨润土微观结构相关的效果引入新的完全耦合的热水 - 机械（THM）有限元码。在简要审查管理余额方程及其实施之后，本文更详细地讨论了对膨润土的液压行为的材料微观结构效应以及如何将其纳入建模框架中。基于MX-80膨润土的实验数据，校准了新配方所需的参数，并采用恒定体积渗透实验的建模。从数值模拟中获得的溶胀压力与实验结果吻合良好，与试验结果相比，不考虑膨润土微观结构的模拟。框架增强还可以更好地理解宏观观察到的膨润土行为中的微观结构作用。

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