Mechanical properties of the bare helix model without backbone stiffness.

(a) S/B depends on both D and AR while (b) C/B is insensitive to D. Shaded regions represent the range of experimental S/B and C/B values. (c) The bare helix model is not able to reproduce the positive, experimental ΔL_c values corresponding to the shaded region for the entire range of D and AR tested. Results are calculated using E_c = 668 MPa with the default helical parameters.