Mixed-Mode and Mode-II Fatigue Crack Growth in Woven Composites
- Northwestern Univ., Evanston, IL (United States)
In this work, a woven carbon/epoxy composite was subjected to fatigue crack growth under mixed Mode-I/Mode-II loading to obtain crack growth behavior at different cyclic strain energies. Owing to the woven structure of the material, pure Mode-II fracture is usually a difficult proposition because of friction, interference, and interlock of woven tows in adjacent plies at an interlaminar crack. These limitations were overcome by the use of a novel form of mixed Mode-I/Mode-II specimen, which imposes sufficient crack surface opening (Mode-I) to alleviate ply-ply interactions, but not so much as to obscure the sliding (Mode-II) response. Finally, comparison with pure Mode-I fatigue crack growth data, in conjunction with a fracture interaction criterion, provided a means to extract the Mode-II behavior.
- Research Organization:
- Ford Motor Company, Detroit, MI (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
- Grant/Contract Number:
- EE0006867
- OSTI ID:
- 1504729
- Journal Information:
- Proceedings of the Society for Experimental Mechanics Series, Vol. 8; Related Information: Fracture, Fatigue, Failure and Damage Evolution; ISBN 978-3-319-42194-0; ISSN 2191-5644
- Publisher:
- Society for Experimental Mechanics - SpringerCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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