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why bad
* flutter is cyclic deformation
* cyclic deformation can lead to 'work-hardening'
* work-hardening can lead to embrittlement of the panel
* embrittlement can lead to fracture
* fracture leads to panel failure
* Panel failure alters pressure distribution in the vicinity of the failed panel
* the altered pressure distribution can affect aerodynamic stability.
* Flutter-induced aerodynamic instability has killed a number of people. Aircraft and record cars.
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