| Autor: |
Alla V. Usova, Natalia M. Bykova, Yana V. Sivacheva, Igor N. Sachkov, Victoria F. Turygina, Vitaly Ford |
| Rok vydání: |
2021 |
| Předmět: |
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| Zdroj: |
INTERNATIONAL CONFERENCE OF COMPUTATIONAL METHODS IN SCIENCES AND ENGINEERING ICCMSE 2020. |
| ISSN: |
0094-243X |
| DOI: |
10.1063/5.0047762 |
| Popis: |
Usage of FEM gives opportunity to notice new mechanism of electrical contact material degradation. Until this moment the reasons for the exponential dependence of the failure rate of electrical contacts on the time of their operation was not clear. The article announces new program FEM, which gives us opportunity to explore the occurrence of thermal crack systems that occur in two-phase electrically conductive materials. The paper considers the processes of Joule heat evolution in a two-phase system containing weakly conducting circular inclusions. We discovered the synergistic mechanism of nucleation and spontaneously accelerating crack growth. A number of process control parameters were presented: the contrast of the conductivity of the matrix and the inclusion, the heterogeneity of the location of the inclusions, the probability of inrush currents. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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