Study of mechanical properties and cracking extension resistance behavior of C/SiC composites by single edge notched beam and digital image correlation techniques
| Autor: | Qingsong Ma, M.S. Si, W.G. Mao, Daining Fang, R.F. Zhang, Cuiying Dai, J. Chen, Z.B. Peng |
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| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Toughness Digital image correlation Materials science Mechanical Engineering 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Cracking chemistry.chemical_compound Fracture toughness Flexural strength chemistry Mechanics of Materials 0103 physical sciences Silicon carbide General Materials Science Composite material 0210 nano-technology Beam (structure) Stress intensity factor |
| Zdroj: | Materials Science and Engineering: A. 649:222-228 |
| ISSN: | 0921-5093 |
| DOI: | 10.1016/j.msea.2015.09.101 |
| Popis: | The carbon fiber reinforced silicon carbide matrix (C/SiC) composites were prepared by using precursor infiltration and pyrolysis method. Fracture characteristics of C/SiC materials were studied by single edge notched beam with the aid of digital image correlation (DIC) technique. It was found that DIC played an important role in in-situ monitoring full/local strain evolution and cracking growth during bending tests, which was useful for revealing potential failure micro-mechanisms of C/SiC composites. The results showed that the average fracture toughness KIC and fracture strength of C/SiC were estimated as 7.81±0.12 MPa m1/2 and 223.23±3.5 MPa, respectively. Moreover, the crack extension resistance curves (R-curve) in terms of stress intensity (KR-curves) were determined on the basis of the crack initiation toughness KIC. The values varied from 4.68 MPa m1/2 to 16.83 MPa m1/2 during the R-curve tests. |
| Databáze: | OpenAIRE |
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