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The Entropy of Internal Stress Fields
Author(s) -
Schoeck G.
Publication year - 1980
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220970140
Subject(s) - internal stress , internal energy , statistical physics , entropy (arrow of time) , mathematics , perturbation (astronomy) , zener diode , stress field , elasticity (physics) , mathematical analysis , physics , classical mechanics , thermodynamics , quantum mechanics , materials science , voltage , finite element method , resistor , composite material
In the strictly linear elasticity theory (no third order terms in the expansion of the free energy) or in the harmonic approximation for a crystal, there is no entropy change when an internal stress field is introduced into a body. When higher order terms are considered it is shown that in the expressions given by Zener and DiMelfi et al. terms are missing which in the hierarchy of perturbation are of the same order however due to the magnitude of the material parameters generally make a small contribution. In addition there exists an entropy of interaction between two internal stress sources.