Figure 4. Effect of loading direction, θ, and dimples arrangement on .

(a) Evolution of as a function of θ for an elastic sheet with a square array of dimples dented to form a checkerboard (blues line) and a stripe (red line) pattern. For this set of simulations, we assume ψ = 75%, h/r = 0.5, t/r = 0.08 and ν = 0.35. (b) Evolution of as a function of θ for an elastic sheet with a triangular array of dimples dented on both sides. Here, we assume ψ = 86%, h/r = 0.5, t/r = 0.08 and ν = 0.35.