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A study of damage zones or characteristic lengths as related to the fracture behavior of graphite/epoxy laminates
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Yeow, Y. T. Brinson, H. F. |
| Copyright Year | 1977 |
| Description | Uniaxial tensile tests conducted on a variety of graphite/epoxy laminates, containing narrow rectangular slits, square or circular holes with various aspect ratios are discussed. The techniques used to study stable crack or damage zone growth--namely, birefringence coatings, COD gages, and microscopic observations are discussed. Initial and final fracture modes are discussed as well as the effect of notch size and shape, and laminate type on the fracture process. Characteristic lengths are calculated and compared to each other using the point, average and inherent flaw theories. Fracture toughnesses are calculated by the same theories and compared to a boundary integral equation technique. Finite width K-calibration factors are also discussed. |
| File Size | 1295260 |
| Page Count | 45 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19770018307 |
| Archival Resource Key | ark:/13960/t2v45hp2h |
| Language | English |
| Publisher Date | 1977-05-01 |
| Access Restriction | Open |
| Subject Keyword | Composite Materials Toughness Epoxy Compounds Tensile Tests Graphite Fracture Strength Laminates Aspect Ratio Crack Initiation Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
