Experimental investigation on Mode-I fracture toughness of Carbon-Carbon composites fabricated by preformed yarn method
| Autor: | M. Anilas, B.V. Sunil Kumar, A.O. Surendranathan, V. Neelakantha Londe, M. Lokesha |
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| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Toughness Materials science Reinforced carbon–carbon 02 engineering and technology Yarn 021001 nanoscience & nanotechnology 01 natural sciences Fracture toughness visual_art 0103 physical sciences visual_art.visual_art_medium Fracture (geology) Ceramic Composite material 0210 nano-technology Brittle fracture |
| Zdroj: | Materials Today: Proceedings. 46:2431-2435 |
| ISSN: | 2214-7853 |
| Popis: | Carbon-Carbon composites are one such material that gives designers significant importance for advanced applications over conventional materials. They are applied in applications at very high temperatures (up to 3000 °C), and under extreme conditions. They have a density which is much less than metals and ceramics and thus, make low part weight a significant factor for aerospace applications. Fracturing toughness is a measurable way to express a substance's resistance to fracture in the case of a break. This paper describes the experimental studies done to investigate the Mode-1 fracture toughness of carbon–carbon composites which was fabricated via the preformed yarn method. Fracture toughness was determined for four different (a/w) ratios i.e. 0.45, 0.47, 0.50 and 0.52 respectively. The results showed that with only two cycles of pitch impregnation, HIP and graphitizing, carbon–carbon composites were successfully produced. The specimen having an (a/w) ratio of 0.45 had a higher fracture toughness value in comparison with all values. As the (a/w) ratio was increasing, the fracture toughness value decreased and the fractured surface clearly shows a brittle fracture behavior. |
| Databáze: | OpenAIRE |
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