Imagine this scenario:
As the slenderness ratio (length-to-diameter ratio) of a rocket increases, its bending stiffness decreases. This makes the vehicle highly susceptible to aeroelastic phenomena. Aeroelasticity is the interaction between aerodynamic forces, elastic forces, and inertial forces. In flexible rockets, this interaction can lead to: dynamics and simulation of flexible rockets pdf
: Significant complexity arises from coupling between the flexible body and separate dynamic elements: In flexible rockets, this interaction can lead to:
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: A classic NASA report that examines the mathematical modeling of elastic bodies under longitudinal acceleration while accounting for rapid mass depletion NASA (.gov)