Supplementary Material to 'Mechanical instabilities and snapping phenomena in helical rods with perversion'

This repository contains videos, data, and coding notebooks associated with the publication 'Mechanical instabilities and snapping phenomena in helical rods with perversion' by Dilly et al.CONTENTS:Biphasic model calculation: Biphasic numerical data, as well as a 360° view of the double-well energy surface is provided in the two attached Mathematica notebooks and the two text data files. The first Mathematica notebook also details the analytical derivation of the h(Gamma,z0) function.Shooting calculation: Shooting method, the Python code.Supplemental video 1: Video illustrating a chirality inversion in the biphasic model, with plots in both the (z,n) and (kappa,tau) planes.Supplemental video 2: Video shows the experiment with writhing transition.Supplemental video 3: Video shows the 3D reconstruction of the experiment with writhing transition.Supplemental video 4: Continuous generation of a perversion in the system: small number of turns n0 and z0 close to zero.Supplemental video 5: Continuous generation of a perversion in the system at z0 and n0 corresponding to the case discussed in text.Supplemental video 6: Snapping to self-contact and demonstration of hysteresis.Data from figures: The file contains data presented in figures.