Modeling the process of unsteady one-dimensional diffusion of an aggressive medium

Lokoshchenko, A.; Dalinkevich, A.; Fomin, L.

Информация о цитировании статьи получена из Web of Science, Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 6 декабря 2018 г.

Авторы: Lokoshchenko A., Dalinkevich A., Fomin L.
Журнал: Mechanics of Composite Materials
Том: 54
Номер: 4
Год издания: 2018
Издательство: Springer Nature
Местоположение издательства: Switzerland
Первая страница: 463
Последняя страница: 472
DOI: 10.1007/s11029-018-9756-2
Аннотация: Keywords: corrosive medium, unsteady one-dimensional diffusion, Lagrange interpolation polynomial, integrally average concentration, prediction, numerical calculation, long-term properties, time to fractureThe unsteady one-dimensional diffusion of a corrosive medium across the thickness of a long cylindrical shell is investigated. Data on the concentration of the medium on the outer surface of the shell and the diffusion coefficient are given in the form of piecewise-constant functions of time. The distribution of concentration of the medium across the thickness of the shell and the time-dependent integrally average concentration for shells 1 and 0.5 cm thick are obtained. The concentration of the corrosive medium in the shell is calculated up to a period of five years. The results obtained are compared with calculations for a continuous concentration of the medium at the boundary and the diffusion coefficient as functions of time. Based on the Rabotnov kinetic theory of creep and long-term strength, a way to predict the long-term properties of structural elements in a corrosive medium is shown.
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