Re: LS1 midspan hinge repair
One Sky Dog
Vern,toggle quoted message Show quoted text
These center hinges have failed before. Steel is a lot better in fatigue than Al but if the inflight stress levels are close to the limit it is an insidious problem. It is obviously not a shear failure of they would be breaking upon loading.
Reducing stress is the only answer. This is a materials problem. Either increase cross section, increase load transfer points, or redesign like Jay has done.
Fatigue = repeated cyclic loading below the yield point internal material flaws move to high stress areas over time resulting in cracks and final failure at loads below the design point.
My $0.02 worth of armchair analysis.
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On Monday, May 9, 2022, 4:47 AM, Frankenbird Vern <smeshno1@...> wrote: