Figure 1.

Various snapshots of the elastic relaxation of fibre of $N=20$ beads towards equilibrium along time (grey levels). ($x_{\mathrm{c}},y_{\mathrm{c}}$) corresponds to the centre of mass of the fibre and a the radius of the beads. In this case, without noise, measuring the generalized velocity $\mathcal{V}$ permits the exact evaluation of elastic properties along the fibre ${\mathit{\Theta }}_{\mathrm{e}}$ using (3.5).