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Old 25th June 2013, 15:27
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Re: Whitley test "produced a failure at 98% of the design load" is that good?

Bill - I don't doubt that there was a reference to bending analysis of asymmetric loads in text, but curious how the aero loads would have been simulated accurately.

It is relatively straight forward to calculate the sectional moments of inertia for the fuselage/tail station by station but quite a bit more to look at a moment by moment load/fuselage response with no finite element/relaxation methods applied via computer simulation in the 30's (or 40's or 50's or early 60's)...

having said that my practical experience didn't start until late 60's so my comments are to be taken with grain of salt about WWII methodology-

Ditto on the presumed reaction of airframe structures chief when confronted with 2% above design load structural integrity.

And ditto on Limit Load @ 100% Design Gross Weight for the configuration/condition analyzed with 150%. for Ultimate.. Simple rules for steel/aluminum with homogeneous metals - with departure when stress/strain curves were not linear in elastic range.
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