首页|Stress assessment and fracture surface analysis in a foreign object damaged 7075-T6 specimen under rotating bending
Stress assessment and fracture surface analysis in a foreign object damaged 7075-T6 specimen under rotating bending
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NSTL
Elsevier
? 2022 Elsevier LtdThe damage caused by impact of hard particles on aircraft components is called Foreign object damage (FOD) and it may cause premature failure. 7075-T6 is one of the alloys frequently used for manufacturing aircraft parts and components. In this paper, the failure mechanism of a damaged 7075-T6 specimen subject to rotating bending was explained from a phenomenological point of view using the Finite Element (FE) method and the fracture surface observation. The results showed that the crack initiation occurred in the locations of the highest residual tensile axial stresses after the impact, where also the tensile axial stresses in the simulated fatigue cycle are the highest, and at the surface of the FOD dent. A discontinuity was observed under the dent, in the area subject to compression after the impact and in the fatigue cycle. The damage induces a 30 ± 10% reduction in fatigue strength compared to undamaged specimens.
7075-T6FatigueFinite element methodForeign object damageFracture surface analysis
Arcieri E.V.、Baragetti S.、Bozic
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Department of Management Information and Production Engineering University of Bergamo
Faculty of Mechanical Engineering and Naval Architecture University of Zagreb
NSTL
Elsevier
