The Dynamic Fracture Toughness of Carbon-Carbon Composites
- 1 July 1973
- journal article
- research article
- Published by SAGE Publications in Journal of Composite Materials
- Vol. 7 (3) , 334-346
- https://doi.org/10.1177/002199837300700305
Abstract
The dynamic fracture toughness of two types of carbon-carbon com posites (filament wound and felt substrate) and ATJ-S graphite was deter mined from instrumented Charpy impact tests. The resistance to crack initiation from a pre-existing flaw (notch) was examined by investigating the dynamic fracture toughness, KD, a linear elastic fracture mechanics parameter. The resistance to crack initiation and propagation was deter mined using the dynamic work-of-fracture parameter, γ fD. Testing was conducted over a range of impact velocities (4.0-202.8 in/sec), and the parameters KD and γ fD were found to be strongly sensitive to impact velocity for all three materials. As expected, the dynamic fracture tough ness of the highly anisotropic filament wound carbon-carbon composite was dependent on filament orientation.Keywords
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- Review of Developments in Plane Strain Fracture Toughness TestingPublished by ASTM International ,1970
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