Theoretical model of characteristic temperature and continuous fracture mechanism of brittle material in the process of turning fluorophlogopite ceramics
| Autor: | Lianjie Ma, Hang Deng, Tao Liu, Yunguang Zhou, Yanqing Tan, He Pei |
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| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Materials science Process Chemistry and Technology Fracture mechanics 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Quantization (physics) Brittleness Volume (thermodynamics) visual_art 0103 physical sciences Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Cemented carbide Fracture (geology) Ceramic Composite material 0210 nano-technology Microscale chemistry |
| Zdroj: | Ceramics International. 45:12521-12527 |
| ISSN: | 0272-8842 |
| Popis: | By analysing the variational patterns of the cutting temperature for brittle materials, the concept of characteristic temperature was proposed to evaluate the changes in effective thermal characteristics and macro temperature during the cutting process of engineering ceramics. The quantization method of the characteristic temperature was also presented. As isolated cracks could only reflect single microscale fracture behaviour, and was incompatible with the continuous cutting process, the continuous facture mechanism of brittle materials was proposed. The quantization methods for the fracture number and volume of the cutting heat receptor were improved. Based on the principle of energy conservation and fracture mechanics, the theoretical model of characteristic temperature for brittle materials was established. Verification experiments of the turning process were carried out by cutting fluorophlogopite ceramics with a cemented carbide tool. The experimental results show that the variations in cutting temperature caused by changes in process parameters can be characterized by the characteristic temperature. The model of cutting temperature for brittle materials was demonstrated to be practical. |
| Databáze: | OpenAIRE |
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