Figure 6.

Dimensionless level sets of the displacement components c₂₂ℓu₁ and c₂₂ℓu₂ due to a concentrated unit moment acting at the origin of the axes. (a) A couple-stress material at the failure of (E) (α=0.5, ε=0.5, δ=0.2, β=0) evidences faulting. The vertical displacement becomes discontinuous along the line x₁=0. (b) A couple-stress material far from (E) loss (α=0.5, ε=0.5, δ=0.2, β=0.5). The displacement field remains continuous and no localization is observed. (Online version in colour.)