The Role of Phase Transition in Slope Stability Analyses
The paper presents a thermodynamically consistent analysis of rainfall induced landslides in partly saturated porous materials. The thermodynamic framework is based on non-equilibrium thermodynamics and the theorem of minimum entropy production. The model is implemented in the FE software Abaqus and it is applied in the analysis of an ideal problem in which the role of water condensation is modeled. The analysis is performed in plane strain conditions and it shows as associative plasticity is able to capture the initialization of the mud flow. The numerical algorithm for the constitutive law is derived by the thermodynamics and it is able to describe the collapse induced by wetting. The presented mathematical framework is able to explain the mechanical instability of hill slopes during a coupled strain-diffusion analysis.
KeywordsDebris Flow Entropy Production Slope Stability Analysis Entropy Inequality Rainfall Infiltration
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