Table 1 Membrane response for different tensile loads as a function of the tensile stress: wrinkling compressive load, wrinkling wavenumber, size of the wrinkles when the compressive load is twice the wrinkling load

N _Y (N/mm)

${\mathbf{N}}_{\mathbf{X}}^{\mathit{wr}}$ (N/mm)

$\frac{{\mathbf{L}}_{\mathbf{X}}}{{\mathbf{\ell }}^{\mathit{wr}}}$

$\begin{array}{l}\frac{\mathbf{a}}{\mathbf{h}}\mathit{for}\\ {\mathbf{N}}_{\mathbf{X}}\mathbf{=}\mathbf{2}{\mathbf{N}}_{\mathbf{X}}^{\mathit{wr}}\end{array}$