Modeling the Process of Unsteady One-Dimensional Diffusion of an Aggressive Medium
| Autor: | A.M. Lokoshchenko, A. A. Dalinkevich, L. Fomin |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Polymers and Plastics Period (periodic table) General Mathematics Shell (structure) Boundary (topology) 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics Biomaterials Integrally closed 020303 mechanical engineering & transports Distribution (mathematics) 0203 mechanical engineering Creep Mechanics of Materials Solid mechanics Ceramics and Composites Composite material Diffusion (business) 0210 nano-technology |
| Zdroj: | Mechanics of Composite Materials. 54:463-472 |
| ISSN: | 1573-8922 0191-5665 |
| DOI: | 10.1007/s11029-018-9756-2 |
| Popis: | The unsteady one-dimensional diffusion of an aggressive 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 aggressive 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 aggressive medium is shown. |
| Databáze: | OpenAIRE |
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