Open AccessТермомеханика деформаций в ангармоническом твердом теле
Author(s) -
Н.Н. Горобей,
А.С. Лукьяненко
Publication year - 2019
Publication title -
fizika tverdogo tela
Language(s) - English
Resource type - Journals
eISSN - 1726-7498
pISSN - 0367-3294
DOI - 10.21883/ftt.2019.04.47427.295
Subject(s) - anharmonicity , degrees of freedom (physics and chemistry) , physics , perturbation theory (quantum mechanics) , internal energy , classical mechanics , perturbation (astronomy) , statistical physics , thermodynamics , quantum mechanics
The macroscopic laws determining the temperature and deformations of an anharmonic solid body in a given external temperature force field have been stated in the form of the first thermodynamics law supplemented by equations of state of the body. The internal and free energies necessary for it are found from the statistical sum in which some of degrees of freedom determining the body shape are discharged from statistical averaging. These functions of state have been calculated up to the first order of the perturbation theory in the anharmonicity for the microscopic dynamic model of the body with the interatomic interaction potential energy given as a series in powers of atom coordinates. The classical region of high temperatures is considered.