  In this work we study the dynamical buckling process of a thin filament
immersed in a high viscous medium. We perform an experimental study to track
the shape evolution of the filament during a constant velocity compression.
Numerical simulations reproduce the dynamical features observed for the
experimental data and allow quantifying the filament's load.
  We observe that both the filament's load and the wavenumber evolve in a
step-wise manner. To achieve a physical insight of the process we apply a
theoretical model to describe the buckling of a filament in a viscous medium.
We solve a hydrodynamic equation in terms of normal modes for clamped-clamped
boundary conditions and applied constant load. We find a good agreement with
experimental data and simulations, suggesting that the proposed mechanistic
model captures the essential features underlying the dynamical buckling
process.
