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Crack growth direction in unidirectional off-axis graphite epoxy
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Beuth Jr., J. L. Herakovich, C. T. Gregory, M. A. |
| Copyright Year | 1984 |
| Description | An anisotropic elasticity crack tip stress analysis is implemented using three crack extension direction criteria (the normal stress ratio, the tensor polynominal and the strain energy density) to predict the direction of crack extension in unidirectional off axis graphite-epoxy. The theoretical predictions of crack extension direction are then compared with experimental results for 15 deg off axis tensile coupons with center cracks. Specimens of various aspect ratios and crack orientations are analyzed. It is shown that only the normal stress ratio criterion predicts the correct direction of crack growth. |
| File Size | 1463196 |
| Page Count | 32 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19850017122 |
| Archival Resource Key | ark:/13960/t79s6m12k |
| Language | English |
| Publisher Date | 1984-12-01 |
| Access Restriction | Open |
| Subject Keyword | Composite Materials Stress Analysis Crack Tips Crack Geometry Graphite-epoxy Composites Polynomials Elastic Properties Aspect Ratio Prediction Analysis Techniques Crack Propagation 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 |
