TITLE

Important aspects in the formulation of solid�fluid debris-flow models. Part I. Thermodynamic implications

AUTHOR(S)
Hutter, Kolumban; Schneider, Lukas
PUB. DATE
June 2010
SOURCE
Continuum Mechanics & Thermodynamics;Jun2010, Vol. 22 Issue 5, p363
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
This article points at some critical issues which are connected with the theoretical formulation of the thermodynamics of solid�fluid mixtures of frictional materials. It is our view that a complete thermodynamic exploitation of the second law of thermodynamics is necessary to obtain the proper parameterizations of the constitutive quantities in such theories. These issues are explained in detail in a recently published book by Schneider and Hutter (Solid�Fluid Mixtures of Frictional Materials in Geophysical and Geotechnical Context, 2009), which we wish to advertize with these notes. The model is a saturated mixture of an arbitrary number of solid and fluid constituents which may be compressible or density preserving, which exhibit visco-frictional (visco-hypoplastic) behavior, but are all subject to the same temperature. Mass exchange between the constituents may account for particle size separation and phase changes due to fragmentation and abrasion. Destabilization of a saturated soil mass from the pre- and the post-critical phases of a catastrophic motion from initiation to deposition is modeled by symmetric tensorial variables which are related to the rate independent parts of the constituent stress tensors.
ACCESSION #
52691617

 

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