Prediction and Detection of Fatigue Damage.
Final rept. 14 Jan 74-30 Jun 75,
MARTIN MARIETTA AEROSPACE DENVER COLO DENVER DIV
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Changes in the surface layer stress of 2014-T6 aluminum alloy were determined as incremental and decremental stress changes were made with increased cycling, up to the point of failure. A methematical relationship was derived and tested for prediction of cumulative damage. This relation takes into account the prior fatigue history when considering multiple stress cyclic tests. The predicted and experimental values for failure of 2014-T6 were in excellent agreement.
- Metallurgy and Metallography