Solved The above stress can be approximated by a sinusoidal
The above stress can be approximated by a sinusoidal function (i.e. sine wave) with an average 2, 199 kPa, amplitude 220 kPa, and a frequency of 6 Hz. At a second flight condition, the stress had an additional sinusoidal component (i.e., in addition to the first sine wave above) that has three times the above freque magnitudes, and 90 degrees ...
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