Some Aspects of Structural Modeling of Damage Accumulation and Fracture Processes in Metal Structures at Low Temperature
The problem of brittle fracture of structures at low temperature conditions connected to damage accumulation and ductile-brittle transition in metals. The data for locomotive tire contact impact fatigue and spalling are presented. The results of experimental testing showed the impact toughness drop...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2016-01-01
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| Series: | Modelling and Simulation in Engineering |
| Online Access: | http://dx.doi.org/10.1155/2016/7178028 |
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| author | Valeriy Lepov Albert Grigoriev Valentina Achikasova Kyunna Lepova |
| author_facet | Valeriy Lepov Albert Grigoriev Valentina Achikasova Kyunna Lepova |
| author_sort | Valeriy Lepov |
| collection | DOAJ |
| description | The problem of brittle fracture of structures at low temperature conditions connected to damage accumulation and ductile-brittle transition in metals. The data for locomotive tire contact impact fatigue and spalling are presented. The results of experimental testing showed the impact toughness drop at low temperature. The internal friction method was applied to revealing of the mechanism of dislocation microstructure changes during the low temperature ductile-brittle transition. It has been shown for the first time that the transition is not connected to interatomic interactions but stipulated by thermofluctuation on nucleus such as microcracks and by their further growth and coalescence. From now on, the proposed mechanism would be used for theoretical and numerical modeling of damage accumulation and fracture in materials. |
| format | Article |
| id | doaj-art-6ef290727a264d918677fe9c561c93c0 |
| institution | Kabale University |
| issn | 1687-5591 1687-5605 |
| language | English |
| publishDate | 2016-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Modelling and Simulation in Engineering |
| spelling | doaj-art-6ef290727a264d918677fe9c561c93c02025-02-03T07:26:18ZengWileyModelling and Simulation in Engineering1687-55911687-56052016-01-01201610.1155/2016/71780287178028Some Aspects of Structural Modeling of Damage Accumulation and Fracture Processes in Metal Structures at Low TemperatureValeriy Lepov0Albert Grigoriev1Valentina Achikasova2Kyunna Lepova3V. P. Larionov’s Institute of Physical-Technical Problems of the North, SB RAS, Yakutsk 677980, RussiaV. P. Larionov’s Institute of Physical-Technical Problems of the North, SB RAS, Yakutsk 677980, RussiaV. P. Larionov’s Institute of Physical-Technical Problems of the North, SB RAS, Yakutsk 677980, RussiaV. P. Larionov’s Institute of Physical-Technical Problems of the North, SB RAS, Yakutsk 677980, RussiaThe problem of brittle fracture of structures at low temperature conditions connected to damage accumulation and ductile-brittle transition in metals. The data for locomotive tire contact impact fatigue and spalling are presented. The results of experimental testing showed the impact toughness drop at low temperature. The internal friction method was applied to revealing of the mechanism of dislocation microstructure changes during the low temperature ductile-brittle transition. It has been shown for the first time that the transition is not connected to interatomic interactions but stipulated by thermofluctuation on nucleus such as microcracks and by their further growth and coalescence. From now on, the proposed mechanism would be used for theoretical and numerical modeling of damage accumulation and fracture in materials.http://dx.doi.org/10.1155/2016/7178028 |
| spellingShingle | Valeriy Lepov Albert Grigoriev Valentina Achikasova Kyunna Lepova Some Aspects of Structural Modeling of Damage Accumulation and Fracture Processes in Metal Structures at Low Temperature Modelling and Simulation in Engineering |
| title | Some Aspects of Structural Modeling of Damage Accumulation and Fracture Processes in Metal Structures at Low Temperature |
| title_full | Some Aspects of Structural Modeling of Damage Accumulation and Fracture Processes in Metal Structures at Low Temperature |
| title_fullStr | Some Aspects of Structural Modeling of Damage Accumulation and Fracture Processes in Metal Structures at Low Temperature |
| title_full_unstemmed | Some Aspects of Structural Modeling of Damage Accumulation and Fracture Processes in Metal Structures at Low Temperature |
| title_short | Some Aspects of Structural Modeling of Damage Accumulation and Fracture Processes in Metal Structures at Low Temperature |
| title_sort | some aspects of structural modeling of damage accumulation and fracture processes in metal structures at low temperature |
| url | http://dx.doi.org/10.1155/2016/7178028 |
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