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Thermoelastic and thermoplastic response of a porous space submitted to a decaying heat source
Author(s) -
Giraud A.,
Rousset G.
Publication year - 1995
Publication title -
international journal for numerical and analytical methods in geomechanics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.419
H-Index - 91
eISSN - 1096-9853
pISSN - 0363-9061
DOI - 10.1002/nag.1610190703
Subject(s) - thermoelastic damping , materials science , thermal diffusivity , porosity , pore water pressure , porous medium , isothermal process , poromechanics , mechanics , permeability (electromagnetism) , compressibility , consolidation (business) , effective stress , geotechnical engineering , thermal , thermodynamics , composite material , geology , physics , chemistry , biochemistry , accounting , membrane , business
A general solution scheme is developed for one‐dimensional and non‐isothermal consolidation problems for fluid‐saturated, porous, thermoelastic media. Two fundamental parameters which describe the coupling effects between thermal, hydraulic and mechanical behaviour are: ratio of thermal and hydraulic diffusivity and ratio of thermomechanical deformabilities in drained and undrained conditions. The solution scheme has been applied to the nuclear waste disposal problem. A solution for a thermoporoelastic rock mass containing a decaying heat source is presented. Numerical results show that coupling effects are most pronounced for low permeability and high porosity media such as deep compressible clays. This corresponds to a low value of the ratio of hydraulic and thermal diffusivities and a high value of the ratio of deformabilities in drained and undrained conditions. Comparison with numerical simulations taking into account the non‐linear and non‐reversible behaviour of the rock mass is presented. It shows that the thermoelastic model is quite correct for temperature and displacement fields, and gives maxima of the pore pressure and stress elevations.