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Normalized strain c22ℓε11 produced by a concentrated unit force acting at the origin of axes in the x1-direction. Similar compaction and dilation bands form near (E) loss (a) in the couple-stress material (α=10−4, ε=0.5, δ=0, β=0.5) and (b) in the underlying classical Cauchy material (α=10−4, ε=0.5, δ=0). (Online version in colour.)
