Figure 3.

Dimensionless level sets of the displacement components c₂₂u₁ and c₂₂u₂ due to a concentrated unit force acting at the origin of the axes and aligned with the x₂-axis of orthotropy. (a) Couple-stress material at the failure of (E) (α=0.5, ε=0.5, δ=0.2, β=0) where folding is clearly visible. (b) The underlying classical Cauchy material (α=0.5, ε=0.5, δ=0.2) far from (E) loss where localization is not observed. (Online version in colour.)