Instability of helices


  • Stable helix:
    Case 1) curvature =1.0, twist=0.5 pi


  • Unstable helix: buckling behavior
    Case 1) curvature=0, twist=3.4 pi
    Case 2) curvature=0, twist=3.5 pi


  • When the bottom end is tethered
    Case 1) curvature=0, twist=5.2 pi
    Case 2) curvature=0, twist=6 pi