| タイトル | Simulation of Fatigue Crack Initiation at Corrosion Pits With EDM Notches |
| 本文（外部サイト） | http://hdl.handle.net/2060/20030032270 |
| 著者（英） | Piascik, Robert S.; Newman, John A.; Smith, Stephen W. |
| 著者所属（英） | Army Research Lab.; NASA Langley Research Center |
| 発行日 | 2003-03-01 |
| 言語 | eng |
| 内容記述 | Uniaxial fatigue tests were conducted to compare the fatigue life of laboratory produced corrosion pits, similar to those observed in the shuttle main landing gear wheel bolt-hole, and an electro-discharged-machined (EDM) flaw. EDM Jaws are used to simulate corrosion pits during shuttle wheel (dynamometer) testing. The aluminum alloy, (AA 7050) laboratory fatigue tests were conducted to simulate the local stress level contained in the wheel bolt-hole. Under this high local stress condition, the EDM notch produced a fatigue life similar to test specimens containing corrosion pits of similar size. Based on the laboratory fatigue test results, the EDM Jaw (semi-circular disc shaped) produces a local stress state similar to corrosion pits and can be used to simulate a corrosion pit during the shuttle wheel dynamometer tests. |
| NASA分類 | Quality Assurance and Reliability |
| レポートNO | L-18262
AFL-TR-2927
NASA/TM-2003-212166
NAS 1.15:212166 |
| 権利 | No Copyright |
