Simulation of residual thermal stresses in high-porous fibrous silicon nitride ceramics
| Autor: | L.N. Rabinsky, E.L. Kuznetsova |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Metals and Alloys 02 engineering and technology Condensed Matter Physics Residual 030226 pharmacology & pharmacy 03 medical and health sciences chemistry.chemical_compound 020303 mechanical engineering & transports 0302 clinical medicine Thermoelastic damping 0203 mechanical engineering Silicon nitride chemistry Mechanics of Materials Residual stress Ultimate tensile strength Materials Chemistry Ceramics and Composites Silicon carbide Composite material Porous medium Porosity |
| Zdroj: | Powder Metallurgy and Metal Ceramics. 57:663-669 |
| ISSN: | 1573-9066 1068-1302 |
| DOI: | 10.1007/s11106-019-00029-4 |
| Popis: | The residual thermal stresses induced in high-porous fibrous silicon nitride ceramics with fine reinforcement inclusions have been computed within numerical experiment. The computations have been performed employing a coupled transient linear thermoelastic problem. The initial state characterized by zero internal stresses is observed when the material is synthesized at high temperatures. Three-dimensional representative fragments of fibrous structures generated with stochastic algorithms accounting for the set microstructural parameters have been used for the simulation. The effect of the volume content and size of reinforcement as silicon carbide spherical inclusions on residual thermal stresses has been demonstrated. The simulations show that the residual stresses are commonly higher than the ultimate strength of the porous materials under study. |
| Databáze: | OpenAIRE |
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