Important aspects in the formulation of solid–fluid debris-flow models. Part II. Constitutive modelling |
| |
Authors: | Kolumban Hutter Lukas Schneider |
| |
Institution: | 1. Bergstrasse 5, 8044, Zürich, Switzerland 2. Heinrich-Fuhr-Str. 3, 64287, Darmstadt, Germany
|
| |
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. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|