| Autor: |
Jerrell A. Nardiello, Reginald Vachon, Gregory Lee Hovis, Robert D. Fidnarick, William Ranson, Robert J. Christ |
| Rok vydání: |
2007 |
| Předmět: |
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| Zdroj: |
Volume 13: Processing and Engineering Applications of Novel Materials. |
| Popis: |
Results are presented for crack initiation detection and crack growth monitoring using DMI SR-1 Strain Gages and DMI SR-2 Reader in two Northrop Grumman aluminum test coupons subjected to cyclic loading. Results demonstrate the utility of the technology to detect cracks and crack growth in holes. The DMI SR-1 strain gage is applied so that it frames the hole in the test coupon. This results in strain measurements at tangents to hole and associated shear strains. A differential strain reading between gage lengths on parallel and opposing sides of a hole, resulting from discontinuities in the material surrounding a hole, indicates crack initiation and as the crack grows the differential reading increases. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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