Figure 2.
Circumferential stretch as a function of the radii ratio ρ=R1/R2 for the straightening of blocks by end-couples only: (a) Varga and neo-Hookean materials; (b) Fung–Demiray materials with stiffening parameters c=5.5, c=1.0 and
(neo-Hookean limit) and (c) Gent materials with stiffening parameters Jm=0.4, Jm=2.3, Jm=20.0 and
(neo-Hookean limit). (Online version in colour.)