Figure 3.

Universal functions $\mathrm{s}\left(\mathsf{ϵ}\right)$ (dashed blue curve) and $1/{\left[\mathrm{s}\left(\mathsf{\epsilon }\right)\right]}^2$ (red curve) describing the relative changes in the critical free-span length and material stress for varied compressive strain $\mathsf{\epsilon }$. The same vertical axis describes the values of both functions.