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Real-time observation of damage nucleation in three-dimensionally reinforced carbon/carbon composites and role of bundle/matrix interface.
- Source :
-
Advanced Composite Materials . Jun2013, Vol. 22 Issue 3, p165-174. 10p. 3 Black and White Photographs, 2 Diagrams, 1 Chart, 2 Graphs. - Publication Year :
- 2013
-
Abstract
- Carbon/carbon composites (C/Cs) are widely used as thermal protection materials in aviation and aerospace field. Most of the fracture processes of C/Cs have been found to be profoundly affected by their interfacial properties. Specially arranged fiber bundle push-out test was utilized to determine the fiber bundle/matrix interface shear strength of one three-dimensionally reinforced C/Cs. In order to reveal the link between the interfacial properties and the failure behavior, the micromechanisms of damage initiation at the notch tip on the C/Cs was investigated in real-time during the flexural fracture tests through scanning elec-tion microscopy. Real-time fracture observation revealed that the damage was nucleated in the fiber bundle/matrix interfaces around the notch tip and the failure crack was success-fully observed along the fiber bundle/matrix interface. Fiber yarns acted as an obstacle to crack propagation hence it was necessary to increase the load to propagate the crack through the next fiber yarn. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09243046
- Volume :
- 22
- Issue :
- 3
- Database :
- Academic Search Index
- Journal :
- Advanced Composite Materials
- Publication Type :
- Academic Journal
- Accession number :
- 88239435
- Full Text :
- https://doi.org/10.1080/09243046.2013.791238